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Peterson Combination Trailer Tail Light - 7 Function - Incandescent - Square - Driver Side

Peterson Combination Trailer Tail Light - 7 Function - Incandescent - Square - Driver Side

Item # 432400
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Peterson Tail Lights - 432400
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4-3/4" x 4-1/2" Square. Incandescent trailer light serves 7 functions: stop, turn, tail, rear reflex, side reflex, side marker, and license plate light. Stud mount to trailer. Quick-connect wire inserts. (1) 1157 and (1) 1156 bulbs. Lowest Prices for the best trailer lights from Peterson. Peterson Combination Trailer Tail Light - 7 Function - Incandescent - Square - Driver Side part number 432400 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Peterson Trailer Lights - 432400

  • Tail Lights
  • Square
  • Incandescent Light
  • Red
  • Surface Mount
  • 5L x 4-1/2W Inch
  • Peterson
  • Non-Submersible Lights
  • Stop/Turn/Tail
  • Side Marker
  • Side Reflector
  • Rear Reflector
  • License Plate

4-3/4" x 4-1/2" Square. Incandescent trailer light serves 7 functions: stop, turn, tail, rear reflex, side reflex, side marker, and license plate light. Stud mount to trailer. Quick-connect wire inserts. (1) 1157 and (1) 1156 bulbs.


  • Combination trailer tail light serves 6 functions on trailers under 80" wide
    • Stop, turn, tail, rear reflex, side reflex, and side marker
    • License plate light illuminates your trailer's license plate
  • Built-in rear and side reflex reflectors removes the need for a separate reflector
  • Incandescent bulbs can be easily replaced
  • Durable molded housing with screw-on lens
  • Red lens and clear lens over incandescent bulbs
  • Compatible with 12V DC systems
  • Stud mount to trailer with included 1/4" mounting studs
  • Quick-connect wiring inserts allow for push-in connections
    • Grounds through mounting hardware
    • 2 Additional ports allow for extra lights
  • DOT compliant
  • Made in the USA


  • Configuration: driver side
    • Passenger side: 440 (sold separately)
  • Dimensions: 4-3/4" tall x 4-1/2" wide x 2-13/16" thick
  • Distance between mounting studs (center on center): 2"
  • Bulb type:
    • Stop/tail: 1157
    • Turn: 1156
  • Power draw at 12.8V: 2.2 amps
  • 1-Year limited warranty

Manufacturer Cross Reference

Light will work as an exact replacement for:

Grote # 52312

Truck Lite # 534D and 80324R

Optronics # ST9RB

Peterson 440L Under 80 Inch Trailer Combination Tail Light Dimensions

M440L Peterson Combination Tail Light for Trailers Under 80" Wide - 7 Function - Incandescent - Square - Red Lens - Stud Mount - Driver Side - Left Side

California residents: click here

Video of Peterson Combination Trailer Tail Light - 7 Function - Incandescent - Square - Driver Side

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Peterson Square Trailer Tail Light Review

Today we're going to be taking a look at the Peterson stop turn and tail lights for trailer configurations. The left side, we're going to be using a 7-way, which will include the license plate light. That part number is 432400. For the right side, we'll be using the 6-way light, one that doesn't have that. This is part number 432200. You can see our light. Good, clean, sturdy looking light.

That large ring that helps to get that light out. Again, that reflective area around the outside there, and also here on the side. They don't take up a lot of space. Looks like we're going to be just at 3 inches, or just under from the face of our mounting position there to the very backside of the light. Keep that in mind in case you need those measurements. The lights will have a lens.

It's about 4 and a half inches tall by about 4 and a half inches wide. The center section, the circular part, that's going to be a pass-through lens. For when our trailer's just sitting there without light, we've got a reflective ring all the way around the outside so we don't have any wasted space. We come here to the side, we're going to have the same situation on our lens here. It's going to be about 2 and three-quarters by about 2 inches.

This is going to allow our running lights or our blinkers to pass through their really well, but still give us some reflective properties when our trailer's just sitting. If we look here on the backside, we've got our studs. These are going to be pretty standard space. They're going to be 2 inches on center here. That's the way most trailers are going to be configured. It's going to tell us here our tail light wire, just going to poke it in one of the two holes here.

Then, for stop and turn, we use one of the two holes here. The nuts themselves are going to have serrated lock washers attached to them, so we won't have to worry about washers and lock nuts. Just thread that right down on. This is actually going to create the ground, so we won't have to worry about an additional wire that could cause failure. Let's take the nuts off the back of our light for now. We need to get our wires. Now, our old light that we took off wasn't working. Actually, the colors on the wires we're appropriate. Yellow for the left side of the trailer here, and brown for our tail lights. Going to strip these back, and we really want to twist those up as solid as we can get them. The yellow wire acts as our turn signal, and also our brake signal. The brown wire acts as our tail light signal. Your wires might not correspond with that color, but they should have those signals. Really twist those up nice and solid, because the great thing about the light itself is it doesn't require the use of extra butt connectors or extra areas where we might ultimately have a source of failure. We've got the simple push-in connectors here on the back. They've got a weather resistant molded housing there. Just going to go in with our wires, slide them in. You can see now you can pull on them, and they're not going to be coming out of there. Just like that. Really easy, simple connection to make. Doesn't require any tools. You'll see there's a little pass way for those wires to tuck in, and right back into our original mounting location there. It's about as easy as it gets for installs. One socket, or one little wrench, and you'll have the job done. This is with the use of one socket or wrench, and a pair of wire strippers. You'll be able to change out your lights and have a good functioning equipment so you don't have any troubles heading down the highway. Now we can just head over to the right side of the trailer, do the same thing there. Then, we'll test them out. Now, let's test it out and make sure everything's working. Start with our blinkers, and brakes, and our running lights. With everything working properly, that completes our installation of the Peterson square trailer tail stop and turn signal. For the left hand side, part number 432400 and for the right, part number 432200.

Customer Reviews

Peterson Combination Trailer Tail Light - 7 Function - Incandescent - Square - Driver Side - 432400

Average Customer Rating:  4.8 out of 5 stars   (218 Customer Reviews)

4-3/4" x 4-1/2" Square. Incandescent trailer light serves 7 functions: stop, turn, tail, rear reflex, side reflex, side marker, and license plate light. Stud mount to trailer. Quick-connect wire inserts. (1) 1157 and (1) 1156 bulbs.

- 432400

The product matches my existing lights perfectly. The description, including dimensions made making a decision easy to purchase with confidence. 806732

- 432400

Everything worked out real good,and am very pleased. 801545

- 432400

Just like the one I replaced. Easy to reconnect the wiring. 795064

- 432400

This is a company that gets the job done. If you have a need for weird stuff, old stuff, broken stuff, this company will help you, and deliver what you want in just a few days. I love doing business with a company that makes ordering simple, and easy. I’m customer number 35,571, THANK YOU!! 790834

- 432400

Delivery was rapid and order was complete I will definitely use etrailer.com again. 785890

- 432400

Very easy to install and very economic really nice people to talk they’re excelente to guide in the right direction I got my order a day before the a pointed day highly recommend 774031

- 432400

Love it! Fast delivery. I backed utility trailer into a pole in our yard.....twice in one year. Had to replace before husband noticed. etrailer saved me both times. 772331

- 432400

Great price and easy install 771486

- 432400

I bought these for my bike trailer and they work fine. They were what they said they were and etrailer is a great place to buy things online. 757450

- 432400

Good product and good price. Would recommend to anyone 756870

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Solid product. Came as described, easy replacement of existing light and works flawlessly. 739637

- 432400

Everything came in as described and in great delivery time 735003

- 432400

This was delivered on time, packaging was great, your companies business policies are the greatest we have seen and we order online alot. We appreciate you asking so we can Express our gratitude. 734362

- 432400

I purchased these trailer lights while troubleshooting my utility trailer. I was pleased with the quality of the product, the reasonable cost and good customer service. Will order items from this company again. 720669

- 432400

Just rewired a cargo trailer I bought that the lights were always going out. Found 20 butt connectors the guy used no wonder they worked off & on. Now with two new tail lights & new wiring with a straight connection everything works like it should. Everything I have bought from etrailer has been good quality & fast shipping. Thanks 715876

- 432400

No wireing or connector 713418

This trailer tail light is designed to install with the trailer light wiring routed directly into the back of the light. I have attached a review video that shows that wire installation around the 3 minute mark.
-- Victoria B - 10/15/2019


- 432400

Item received very timely. Even got it a day early. I matched tail lights with the easy to view pictures & got what I needed. Very good descriptions. 713904

- 432400

An identical replacement for the original- still working well- no issues. 694483

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Perfect fit and function! Took ten minutes to install. Great buying experience with etrailer.com! 671852

- 432400

The product was just as described. It was securely packaged and arrived undamaged. I would have given 5 stars but delivery took over 7 days which I thought was too long. 658683

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Quick shipping, good price, easy site to navigate 651063

- 432400

I have used Peterson lights for many decades. I stick with them because they maintain a decent quality level. But, I ordered a driver side light and a passenger side light about two weeks apart in two separate orders. On both lights, 1 or both of the threads on the 1/4" X 20 mounting bolts were damaged right on the end of the bolt. This made starting the hex nut impossible. I happened to have a thread file which allowed me to clean the threads up and solve the problem. It just seemed odd to me that this issue occurred. I gave them a 5 star rating anyway because I know Peterson builds a good product and I have used these particular lights for many years without issue. 649424

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Haven’t installed yet but price was good and delivery was fast. 647928

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Great product, fast shipping, everything works! I love it. Also had good videos on the product! Would recommend this place to anyone. 613991

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Product appears to be very good match replaced broken taillight. Vehicle that tows trailer won’t be back till next week light and new connector will be tested then. Thanks 609338

Show More Reviews

Ask the Experts about this Peterson Trailer Lights

  • Single Wire ID Light Bar for a Boat Trailer Over 80 Inches Wide
    Your old ID bar must have grounded through its mounting hardware since it only had the one wire. ID bar # MCL97RB also has just one wire and grounds through the mounting hardware. This is an LED light so it will draw much less power than incandescent lights. If your boat trailer is aluminum though a jumper ground wire should be attached between the frame and mounting hardware and attached to a steel surface or the main trailer connector ground. A ground issue is why the other light was...
    view full answer...
  • Bulb Replacement Part Numbers for 432400 Peterson Square Trailer Tail Light
    The part numbers for replacement bulbs for the 432400 taillight lens are, A1157B for the stop, turn and taillights. The side marker lamp replacement is A194B.
    view full answer...
  • How To Install The Peterson Square Trailer Tail Light Part # 432400
    I am assuming you are referring to the Peterson Square Trailer Tail Light part # 432400. If this is the case, on the back of the taillight assembly, there are 4 wire holes for each function located at the top of the tail light assembly. The top two holes are designed for a larger gauge wire whereas the bottom two are designed for a smaller gauge wire. In order to remove the old wires, you will first need to unhook the trailer connector from the vehicle. You can then insert a small screwdriver...
    view full answer...
  • Replacing Bulb on Peterson Square Trailer Tail Light # 432400
    To change the bulbs in Peterson trailer tail light # 432400 you will first remove the main lens which is held on by 4 screws. The main bulb can be removed by pushing down and rotating the bulb counterclockwise. There is a diagram on the inside of the case that explains this and it says turn it 30 degrees then pull up. I had to turn it several more times when I played with the light so it probably varies slightly. To install a new 1157 bulb # 30-90-157 you will line up the lower nub...
    view full answer...
  • How Does Wiring Run to the Peterson Trailer Light part # 432400
    Essentially what you said is how you run wire to the part # 432400. It's a pretty strange method I will agree, but basically you just insert the wires into the holes on the back of the light assemblies and they socket grabs the wire. If you fast-forward to the 2:30 section of the video I attached you will see our installer use this method. It's really pretty nice since you don't have to splice anything or use any soldering. If you do pull hard enough you would be able to remove the wire,...
    view full answer...
  • How to Wire a Trailer Light with 1 Wire
    It sounds like the light on your trailer is either missing a wire or it was only designated for one tail light function. If the light does not look old or damaged, I would guess that it is just a clearance light and should be connected to the running light circuit. If this is the case, it should not function as a brake light as well because it was not designed to do so. The brake lights and tail lights run on different circuits and they were not designed to connect to the same wire on a...
    view full answer...
  • Choosing and Installing a Replacement Peterson 7-Function Square Trailer Tail Light
    The Peterson 7-Function Square Trailer Tail Light # 432400 shown in the linked photo uses press-to-release wire connectors. The arrows in the photo show the lower row of holes that need to be pressed with a pin, nail or similar item to release the wires from the upper holes. If the old light is badly corroded or if the release points do not work you can simply snip off the wires with wire cutters as close as possible to the light's housing in order to keep as much as possible of the trailer...
    view full answer...
  • Availability of Replacement Side Marker Lens for Peterson Square Trailer Tail Light # 432400
    Yes, we do have a replacement lens for the side marker portion of Peterson Square Trailer Tail Light, # 432400. You would need Peterson replacement lens # 55-15R. The lens for the main part of the light is replacement lens # 440-15R.
    view full answer...
  • Peterson Square Trailer Tail Light Comes with Bulbs
    Yes, the 432400, Peterson Square Trailer Tail Light comes with the bulbs. The side marker bulb is a #194 replacement bulb. Our order number for this bulb is A194B (see link below).
    view full answer...
  • Recommended Gauge Wire To Use With Peterson Combination Trailer Tail Light
    You won't need to re-wire the tail lights. The 440-15L has been replaced with the Peterson Combination Trailer Tail Light - 7 part # 432400 and part # 432400 which does work best with 18 gauge wire however if you having trouble getting the wires to catch in the sockets you can strip more coating away and fold up the ends of the wire to double them before sticking them in the holes on the back of the light. There are also 4 holes for each side of the tail light and you can use the smaller...
    view full answer...
  • What Side Marker Replacement Lens Fits the Peterson Square Trailer Tail Light # 432400
    I spoke with my contact at Peterson and the correct replacement lens for the Peterson Square Tail Light is the Peterson Replacement Side Marker # 55-15R. In the manufacturing process, when the lights are being assembled, the side lights are snapped in via machinery, however, when they need to be replaced, they do need to be screwed into place. There are actual entry points for the screws under the lens that you will see when you pop it out. Peterson does not make a snap-in replacement...
    view full answer...
  • Replacement Lens for Peterson Combination Trailer Light # 432400
    The correct replacement lens for your Peterson Combination Trailer Light # 432400 is the part # 440-15R. If you happen to also need the side marker lens you will use part # 55-15R. To order the parts simply click "Add To Cart" on the product page and proceed to the checkout process.
    view full answer...
  • Trailer Tail Light Recommendation that Needs Mounting Studs that are 2-1/2 inches Long
    None of the stud mounted trailer taillights are going to have studs that are 2-1/2 inches in length. What you could do is get a Aero Pro Submersible LED Trailer Tail and License Light # STL37RB and then swap out the carriage bolts that come with it for longer ones that would fit your trailer. The matching other right hand light would be # STL36RB.
    view full answer...
  • Difference Between Driver and Passenger Side Trailer Lights
    There are trailer lights that come in pairs such as the Miro-Flex LED Combination Trailer Tail Lights # TLL28RK although these lights also have a driver's side and passenger's side. It is actually pretty easy to tell the difference; if you take a look at the accompanying photo of the Miro-Flex you can see that the driver's side has a light underneath which is the license plate light that is going to illuminate your license plate. I have added a link to a video review of the Miro-Flex...
    view full answer...
  • Troubleshooting Peterson Tail Lights on Boat Trailer That Keep Burning Out
    It really all depends on what trailer light kit you have installed on your boat trailer. Some kits are designed to withstand submersion and other kits aren't. If you can let me know what kit is on your trailer (not just the type of bulbs you use) I can help you determine if it is submersible (granted we carry it). Another thing to note is that you need to make sure your trailer wiring is unplugged before backing the trailer into the water. Even if your lights are submersible, if you...
    view full answer...
  • Tow Dolly Replacement Lights
    For your old car dolly, you may be interested in the Replacement Driver's Side Fender for Roadmaster RM3477 Tow Dolly with Electric Brakes - Metal # RM-922004 and # RM-922005. For similar lights you can use the Peterson Square Trailer Tail Light, 7-Function, Left Hand # 432400 and # 432200. For light from the sides instead of reflectors, you can use the Over 80" Wide, Square LED Trailer Tail Light, 7-Function, 18 Diode, Right Hand # STL2RB and left hand # STL3RB.
    view full answer...
  • Bulb Replacement For a Peterson 440 Trailer Tail Light
    Both the Peterson Right Hand # 432200 and Left Hand # 432400 Square Trailer Tail Lights use either a 1157 # 30-90-157 or a 168 Incandescent Bulb. I confirmed this with my contact at Peterson.
    view full answer...
  • Replacement Tail Light Cover Needed for a Peterson 440 Trailer Tail Light
    The Peterson DOT AIST 90 that you referenced has to do with how the light was tested, but I do know what light you are talking about. It is commonly known as a Peterson 440 light and we have them listed as part # 432200 for the right hand (passenger) side and part # 432400 for the left hand (driver) side. The only real difference between these 2 parts is that the driver's side light has a clear piece below it that illuminates your license plate. The red lens cover for both lights is...
    view full answer...
  • Trailer Tail Light Protector and Matching Tail Lights
    The light guard # LG440NP is designed to fit Peterson square tail lights # 432200 for the right and # 432400 for the left. A license plate light is still a good idea because you never know where you might tow the trailer! You could also use submersible lights # ST7RB for the left and # ST6RB for the right. And you might be interested in aluminum tread plate light protector # CE26051A. Since it is aluminum it will not corrode like steel.
    view full answer...
  • Replacement Matching Tail Light for Peterson 440-15 Trailer Tail Lights
    The trailer tail light you are looking for is # 432200. I have included a link to some videos that might help with installation. The matching left hand side is # 432400.
    view full answer...
  • Tail Light Lens Needed for a Peterson 440-15 Trailer Tail Light
    It sounds like you actually need a square taillight lens like the Peterson Replacement Lens, item # 440-15R. If the original lens measures 4-5/8 by 4-5/8 inches then this lens will be the correct lens for your tail light. These lenses are replacements for both the Peterson Square Trailer Tail Light, 7-Function, Left Hand, item # 432400 and the Peterson Square Trailer Tail Light, 6-Function, Right Hand, item # 432200. If your light has different dimensions then let me know the measurements...
    view full answer...
  • Options to Replace Square Tail Lights with LED lights for Over 80 Inch and Under 80 Inch Trailers
    If your trailer came with the square Peterson lights then you can use the Submersible LED Trailer Light Kit, # TLL9RK. The Over 80 designation that you see is a federal guideline for trailers that are over 80 inches wide, and extra lighting is required for these trailers. You should check federal and state lighting guidelines if you are not sure that your trailer has the correct lighting installed on it. At this time we do not have an LED version of the Over 80 inch square tail light...
    view full answer...
  • Left and Right Hand Trailer Tail Light Recommendation
    For the matching left hand tail light to go along with the Peterson Square Trailer Taillight part # 432200 that you referenced you will want the Peterson Square Trailer Tail Light # 432400. The # 432400 has a light on the bottom of the assembly to illuminate the license plate. I attached a review video.
    view full answer...
  • Replacement Clip On Side Marker Lens for a Peterson 440 Trailer Tail Light
    The replacement side lens with the clips for the Peterson 440 light is not one that we carry. The replacement light, # 432200 for the right side or # 432400 for the left side, will not cost much more than a replacement lens would. I checked with Peterson and the 440 lights now have screws for that side lens so it would appear they have changed the design.
    view full answer...
  • Can Redline Light Guard be Used with Optronics ST8RB and ST9RB Tail Light Assemblies
    The Redline Light Guard # LG440NP referenced in your question is designed to fit the Peterson Square Trailer Tail Light # 432400 and # 432200, however it can also fit other tail light assemblies. The Optronics Tail Lights # ST8RB and # ST9RB that you also mentioned feature very similar dimensions to the above Peterson assemblies and will absolutely work with the Redline Light Guard. The guard itself has an inside dimension of 5-1/2 inches wide, 5 inches high and 3 inches deep. This will...
    view full answer...
  • How Do You Remove The Peterson Replacement Lens, # 440-15R, On The Taillight To Replace A Bulb
    The Peterson Replacement Lens, # 440-15R, is just the replacement lens, so it does not have any screws included. The screws that hold this lens to the taillight are on the taillight and use the holes that are in each corner of the replacement lens. It is a replacement lens for Peterson Square Trailer Tail Light Right Hand, # 432200, and the Peterson Square Trailer Tail Light Left Hand, # 432400. The taillights do come with bulbs.
    view full answer...
  • Compatibility of Light Guard and Trailer Lights
    The Light Guard # LG440NP would not be compatible with the ONE LED Trailer Tail Light # STL009RB; the guard is designed to work with similar lights, the Peterson Square Trailer Tail Light, 7-Function, Left Hand # 432400 and Right Hand # 432200. I've added links to video reviews of these parts for you to take a look at.
    view full answer...
  • Replacement Light For Peterson 440 151 Trailer Light
    The replacement lens for the 440-151 light you have is not a lens we carry. You may want to consider a replacement light. You would need part # 432200 for the right side or part # 432400 for the left side. The cost for these is not much more than a replacement lens. The Peterson 440 series lights now have screws for the lens so it looks like they have changed the design of the lights.
    view full answer...
  • Are The Optronics LED # STL8RB and # STL9RB Compatible With Light Guard # LG440NP?
    The Redline Light Guard - Unpainted Steel for 440 Tail Light, # LG440NP, has an inside dimension of 5-1/2 wide x 5 high x 3 inches deep. It is designed to fit the Peterson Square Trailer Tail Light, 6-Function, Right Hand, # 432200 and the Peterson Square Trailer Tail Light, 7-Function, Left Hand, # 432400, but it will fit other lights. The Trailer Tail Light - 6-Function - LED - Submersible - 11 Diodes - Red Lens - Passenger, # STL8RB and the Trailer Tail Light - 7-Function - LED -...
    view full answer...

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Info for this part was:

Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Lori W
Video Edited:
Jacob T
Updated by:
Adele M
Updated by:
Brian T
Video by:
Kathleen M
Installed by:
Cole B
Installed by:
Randy B

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