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3rd Brake Light Logic Module

3rd Brake Light Logic Module

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Pacer Performance Vehicle Lights - PP20-702
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This light module filters out unwanted turn signal input from tail lights to ensure your 3rd brake light activates only when brakes are applied. Required when using a single light as a third brake light. 1-800-940-8924 to order Pacer Performance accessories and parts part number PP20-702 or order online at etrailer.com. Free expert support on all Pacer Performance products. Guaranteed Lowest Price and Fastest Shipping for 3rd Brake Light Logic Module. Accessories and Parts reviews from real customers.
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Pacer Performance Accessories and Parts

  • Vehicle Lights
  • Third Brake Light Module
  • Pacer Performance

This light module filters out unwanted turn signal input from tail lights to ensure your 3rd brake light activates only when brakes are applied. Required when using a single light as a third brake light.


Features:

  • 3rd Brake light module filters out unwanted turn signal input to ensure your 3rd brake light activates only when brakes are applied
    • Required when using a single light as a third brake light
    • Great for domestic vehicles that typically use single filament bulbs
  • Maximum combined amp draw must be less than 1.5 amps


20-702 Pacer Performance Third Brake Light Logic Module

Item # PP20-702

Installation Details PP20-702 Installation instructions



Video of 3rd Brake Light Logic Module

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




Video Transcript for Review of Pacer Performance Vehicle Light Parts - Third Brake Light Logic Module - PP20-702

Ellen: Hey, everybody. I'm Ellen here at etrailer.com, and we're going to be taking a quick look at the pacer brake logic module. Now, this allows you to add in a third or center brake light on your trailer or your vehicle. So if you want to put this on an RV or really anything else, and you're adding in that third brake light, this allows you to do that. Basically what it does is it allows you to tap into your wiring from the factory or from maybe a four-pole wiring harness, and it'll filter out the turn signals so that you're not getting a flash on that center brake. You're only going to get the brake signal, so it only comes on when you hit the brakes, rather than coming on if the turn signals are activated.So it just is pretty simple to wire up.

You might want to watch out for putting too much power through this. Some customers have said that if you put through more than 1.5 amps, it won't work, so just keep that in mind. Will work out pretty well for most LED lights, though, since they have a pretty low power draw.There's just three wires to worry about. The green wire is what's going to actually go to your center brake light, and then you'd want to, of course, ground that brake light out. The other two wires, one is going to go to your right turn signal.

The other is going to go to your left turn signal. It doesn't really matter which wire you use. They're just there to get the signal and then filter it out so that brake signal can work. This little guy is just that kind of the brains of the operation, so you want to make sure that maybe you zip tie this off to some existing wiring or just kind of zip tie it off to something so that it's not bouncing around all over the place, but it should be pretty straightforward as far as that goes.This can be used on any kind of domestic vehicle that uses a single filament bulb. You just really want to use this any time you're using a single light as that third brake light.

So maybe again, you're adding in a LED strip to your truck or another vehicle, and adding in that third brake light function, this allow you to use that and not have it flash.As far as the size, give you some quick measurements here. We'll get about nine and a half inches of wire to work with, call it about nine of really usable length there. And the little module itself, it's just about an inch or 7/8 of an inch long and about 5/8 or maybe 3/4 of an inch in diameter. So pretty small, pretty easy to set up just about anywhere you want to.Now, if you need some butt connectors to go with this, you can find a lot of options here at etrailer.com. I would probably suggest using the pink ones.

Those will be for your smaller gauge wire, which this looks like it's about 18 gauge, so that will probably do you. If you're connecting it to anything that's a little bigger, you probably want to go with the blue, which is for 16 to 14 gauge wire, but you can find all of those here at etrailer.com to go with this install.I hope this has been helpful in deciding if this is going to be the right part for you. We do have a lot of other lighting accessories and wiring here at etrailer.com for all kinds of stuff, so check it out. Thanks for watching.


Customer Reviews

3rd Brake Light Logic Module - PP20-702

Average Customer Rating:  4.4 out of 5 stars   (71 Customer Reviews)

This light module filters out unwanted turn signal input from tail lights to ensure your 3rd brake light activates only when brakes are applied. Required when using a single light as a third brake light.

by:

This module is doing the job!

The
story:

A good looking all windows included long bed Ranger camper shell topper came along, it had the interior and brake lights but the wires were cut back.

There are non-working or completely absent 3rd brake lights on toppers all around here on vehicles. However, you just never know, and now my Ranger's cab's 3rd brake light would be covered with the topper on it.

I didn't want to start cutting wires on my old, old, but relatively nice Ranger in case I made the wrong cut. So I through about using the 4-flat trailer harness as I had that free (and I had an old harness piece from an old boat wiring kit). But the turn signal would cause it to blink.

I tried countless combinations of the wiring running off the 4-flat trailer connector. I had really odd things happening during the trial and error process, such as the blown fuse (first time ever for me) to the warning chime in the cab telling when the lights or keys were in the ignition going off when I applied the brakes.

So I thought I would try this logic module out.

At first I over thought it and had tried a couple combinations out with some old boat trailer lights that might have been cool on the topper.

But then simple and straightforward ended up being the way to go.

The green wire on the logic module to the brake light. The yellow wire to either turn signal connecting wire. A separate spare piece of wire from the brake light to the trailer harness ground. That's it.

The topper is not on the truck as of this review, I hope to get it painted since the green topper clashes with the red truck. When I get it on, I can easily plug the -4-flat harness into the trailer harness. It's rare for me to use the trailer.

I can easily revisit the wiring in the future, using the 12-volt power supply from the harness hook up I could power topper interior lights on switch or add lights to the topper. I could very well splice on the trailer wiring harness as well under the truck if I need the trailer harness for the trailer without cutting into my Ranger's wiring.

Either way, this module made getting that third brake light to not blink and illuminate when the brakes are applied. That's what I wanted.




by:

I used this logic module along with this wiring harness to wire up the third brake light on the Leer camper shell that I recently purchased for my 2012 Tundra. Everything went perfectly and resulted in a nice, clean professional installation with no issues.


Comments
Update, I wired this module up exactly as diagramed in the instructions. It seemed to work properly so I used butt connectors to make all the connections. The next day checked functions and third brake light blinks with the turn signals. I took all my connections apart, as well as double checking my ground connections and re-wired. Same result. third brake light blinks when either turn signal is activated. However, if brake is applied when turn signal is activated the third brake light does not blink. So if I could change my rating to one star I would. Love e-trailer but this item is not recommended. Now I have to look for another solution.
-- comment by: Ron G - 07/14/2022


by:

Logic module wired as directed allowed 3rd brake light to work perfectly on camper shell. I plug a 4 way trailer connector into the already installed 4 way plug on my Ford truck, run the wires up my truck body and the wires end in another trailer ‘female’ plug. A second ‘male’ plug is wired to the camper shell and includes the logic module so when my camper shell is mounted on my truck it’s a quick 4 way plug in to be legal with a working 3rd brake light.
The cost of this was just the logic module - cheap - the cost to go to installer and have this set up done professionally over $100 - thanks etrailer




by:

This part did not work for me.I used it on a red lighted license plate frame.The license plate frame would still blink with the left turn signal,which I thought this module would take care of.After numerous attempts @ it,it didn’t. So I kept the module in case I would ever need it again.Needless to say I threw the lighted license plate frame away.




by:

Didn’t work for me, third brake light on truck topper blinks with turn signals. Can’t recommend this one.


Comments
If you wired this like the diagram in the instructions, I would check your ground or for corrosion, which can cause faulty functioning.
-- Etrailer Expert Sierra K - 06/17/2022


by:

Junk! Wasted a lot of time and wire terminals hooking this up exactly as directed to find out it doesn't work. Will wait and see if etrailer.com makes this right. Do not recommend.


Comments
I will have our Customer Service team reach out to you.
-- Etrailer Expert Jenny N - 05/09/2022


by:

Quick and simple installation - works like a charm. I used it to add a third brake light behind the spare tire of my classic Bronco. Some folks said it may not work with LED brake lights, but that's what I have on my Bronco and it worked just fine.




by:

It works as described, included good in structions.




by:

I was skeptical of this module before purchasing because I didn't know about it. Have used other brands to perform these 3rd brake wiring functions previously. Soldered it between 4-pin connector and rear tail/brake light. Simple install and works great.




by:

Bought as spare since my truck cap brake light didn't work (found during inspection, of course). Had to pay $xxx Ford dealer to determine that was the problem and $xx to a truck cap place for a new unit. Took me 20 minutes to replace.




by:

I'm a retired truck driver. I get a little fanatical about lights. I wanted a third brake light for my trailer. This piece makes it possible. Works out great.




by:

Did not work on 2019 2500 Sierra Denali. Using on an ARE camper shell. Left side works but 3rd brake light flashes with right turn signal. I tied it into trailer 7 way plug for sources.


Comments
Thanks for the review! It sounds like it could be a bad ground issue. If you double check all your connections and make sure the ground wire has a clear and direct connection that is free of any debris or rust, then that may be all you have to do.
-- Etrailer Expert Brooke M - 10/28/2021


by:

Wired up easy and now my campertop 3rd brake light works perfect.




by:

Installed the module last year when I rewired my old utility trailer. Still works great! Thanks




by:

If you own a 2020 or newer RAM this us not needed. Brake wire is in harness in front of bumper. White wire with purple stripe for topper brake light.




by:

The third brakelight module was easy to install, and works great, to isolate the high brake light on our Leer camper shell. The third light comes on with the service brake lights and 4-way flashers, but is properly isolated from the turn signals. It is a win-win.




by:

I was a little skeptical being as far down the system as this part was going to be installed that it would work correctly that there would be a flicker of turn signal in the brake light and there is not! It works perfectly and there's a tremendous timesaver for me. etrailer.com sets The standard in customer service. I bought a $15 part the total order was $20 and they babysat it all the way to my door and checked in frequently to make sure that I was happy. I bought a pair of fenders from them in the past and they treated me the same way this company is how business should be done.




by:

Installed this module to make a third, high mounted stop light work on my trailer. Easy installation and good instructions.


Comments
Still working as intended
UliN - 02/25/2021


by:

It did not work


Comments
We recently sent you a new 3rd Brake Light Logic Module and were wondering if you had any feedback about the product for other shoppers? We look forward to hearing from you.
-- Etrailer Expert Jenny N - 08/01/2022


by:

Worked great




by:

Bought for a camper shell on 2001 F150. Powering through 4-wire trailer plug. works but uses small gauge wire.




by:

This works on a 2013 Chevy 1500 Silvera do.




by:

Great product!! Fast shipping




by:

Good item, works great.




by:

Works good. Has questionable reviews on a different online site but I think it’s just people who wired it incorrectly. Requires the input of both tail lights for the logic circuit to work. you need to have dual filament bulbs for tail lights, and then have a led third tail light as well. So if you don’t want to find or don’t have a constant break light wire handy easy way to tap into the factory tail lights.



25
71
Show More Reviews

See what our Experts say about this Pacer Performance Accessories and Parts



  • Third Brake Light Wiring for 2019 GMC Sierra 3500 with Pacer Performance Logic Module
    I've attached the instructions for the Pacer Performance 3rd Brake Light Logic Module # PP20-702 but you'll need to connect the yellow wires to both the left and right turn signals, regardless of where you attach the logic module. Since this module looks to filter out the turn signals, only connecting to one turn signal would likely cause this product to operate incorrectly.
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  • Wiring Camper Shell 3rd LED Brake Light to 2019 Chevy Truck
    To wire in the 3rd brake light from the camper shell to your 2019 Chevy truck I recommend using the Pacer 3rd Brake Light Module # PP20-702. This is designed specifically for single LEDs and will filter out the turn signal input so that it doesn't flash with them during travel. You will simply splice the 3 wires coming from the module to your truck's turn signal circuits and 3rd brake light circuit wire. I have attached an image to assist.
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  • Pacer Performance 3rd Brake Light Logic Module Not Filtering Out Turn Signals
    The Pacer Performance 3rd Brake Light Logic Module # PP20-702 should indeed filter out those turn signals so that the 3rd brake light on your topper doesn't flash when they are on. If you have the module installed and the 3rd brake light is still flashing with the turn signals you will need to make sure everything is wired correctly. The two yellow wires coming from the module should be spliced into the stop/turn circuit wires on your truck's trailer connector (whether it's a 4-Way or...
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  • Troubleshooting Logic Pacer 3rd Brake Light Module PP20-702 Wiring
    Thanks so much for the picture. It looks like you're wiring up the Pacer Module # PP20-702 to a trailer side 7-Way connector, which you then plug into the 7-Way on your truck to power the topper's lights. I was able to zoom in on the connector you're using and the issue appears to be that the yellow and brown wires are simply attached to the incorrect pins. On the connector, the pin where you have the brown (running lights) wire attached is labeled "BLACK", which is reserved for 12V power....
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  • Third Brake Light Still Flashes With Pacer Logic Module Installed
    If the third brake light is still flashing with the Pacer Performance 3rd Brake Light Logic Module part # PP20-702 installed then the unit is either installed incorrectly or faulty. I have attached a wiring diagram you will need to look over and make sure you have yours wired correctly. If all of the wiring appears to be correct then you will need to just replace the unit.
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  • Adding Third Brake Light for Truck Camper Shell on 2000 Chevy Truck
    We have what you need in order to wire in your third brake brake light for the truck camper, though there isn't going to be anything specific to either your 2000 Chevy C2500 or your camper shell. You will simply need to add the Pacer Performance 3rd Brake Light Logic Module # PP20-702 and tap into the turn signal circuits of your Chevy. This converter will separate your truck's combined turn signal/brake lights, which you will need to do so your camper shell's brake light will blink along...
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  • How to Wire Third Brake Light on Camper Shell
    Yes we do have a logic module that will work to wire your third brake light on your camper shell, part # PP20-702 the Pacer Performance 3rd Brake Light Logic Module. The third brake light needs to have a brake signal only, and if you are tapping into your trailer wiring, or tail lights wiring the turn and brake signals will be combined. The logic module filters out the unwanted turn signal inputs. This prevents the third brake light from flashing when you apply your turn signal. The...
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  • Can 2 LED Lights be Powered Using Pacer Performance 3rd Brake Light Logic Module # PP20-702
    There is nothing that says you can't use 2 LED lights with the Pacer Performance 3rd Brake Light Logic Module # PP20-702. And since LED lights draw such little power it is very unlikely that 2 LED lights would overdraw this module which is rated at 1.5 amps. I would not use an incandescent light with it though since they very well could draw more power than the module can handle. But 2 LED lights should not be an issue at all.
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  • Could Pacer Performance 3rd Brake Light Logic Module # PP20-702 be Used to Power Camper Shell Light
    Your truck most likely already has a third brake light circuit ran underneath it for wiring to a truck bed camper. If you trace the trailer wiring back from the connector you should find an extra wire hanging free that has CHMSL on it that's for illuminating a camper shell third brake light. That said, the # PP20-702 can be used as a way to get a dedicated brake light circuit as well.
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  • How to Wire Third Brake Light on Camper Shell of 2011 Ford F-150
    Though we are not privy to any specific wire colors as there is no standard, I can help you with how to wire the third brake light for a camper shell on your 2011 Ford F-150. All you need to do is use the Pacer Performance 3rd Brake Light Logic Module # PP20-702, which has three wires, two yellow wires and a green wire. Simply tap into your F-150's turn signals with the yellow wires and run the green wire to the third brake light on the camper shell. What this module does is filter out...
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  • What is Needed to Wire Truck Camper Shell Third Brake Light
    Wiring the camper shell brake light on your 2017 GMC Sierra 2500 is very straightforward. All you need to do is use the Pacer Performance 3rd Brake Light Logic Module # PP20-702, which has three wires: two yellow wires and a green wire. Simply tap into your Sierra's turn signals with the yellow wires and run the green wire to the third brake light. What this module does is filter out the turn signals and lights up the brake light when you hit the brakes. If you take a look at the cut...
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  • Will 3rd Brake Light Blink with Turn Signal with the Pacer Performance 3rd Brake Light Logic Module
    The Pacer Performance 3rd Brake Light Logic Module # PP20-702 filters out the turn signal and only illuminates the 3rd brake light when the brake pedal is pressed. I have attached a photo of the installation instructions for you to check out.
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  • How to Install Third Break Light for Cap on a 2018 GMC Sierra
    The pictures you are referring to are actually for older Silverado and Sierra pickups. I am not aware of any special wiring near the rear of your 2018 GMC Sierra 2500 but you can easily isolate the brake signal by using the 3rd Brake Light Logic Module # PP20-702. This connects to your left and right turn circuits and then gives you a separate wire for the 3rd brake light (see attached wiring diagram).
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  • How to Wire a 2013 Chevy Silverado 3rd Brake Light For a Camper Top
    Once you have located the Center High Mount Stop Light wire (labeled as CHMSL) under your driver's side dash of your 2013 Chevrolet Silverado (bundled with your brake controller wiring) you will need to run wire from the cab of your Silverado to the wiring for the 3rd brake light on your camper top. The trailer wiring is closer but the problem with tapping into the trailer wiring is that your brake signal is carried with your left and right turn signals as well. If you were to tap into...
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    To isolate the brake light signal on your 2019 Chevy Silverado 2500HD you just need the Pacer Performance 3rd Brake Light Logic Module # PP20-702. You can use the attached installation instructions for the 3rd brake light on your camper shell.
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  • How to Wire a Third Brake Light on a Truck With Combined Wiring
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  • Will Pacer Performance 3rd Brake Light Logic Module # PP20-702 Fit 2019 Chevy Silverado
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    Wiring a camper shell's third brake light is a straightforward process, and does not require you to run a wire from the BCM to the exterior. All you need to do is use the Pacer Performance 3rd Brake Light Logic Module # PP20-702, which has three wires, two yellow wires and a green wire. Simply tap into your F-150's turn signals with the yellow wires and run the green wire to the third brake light. What this module does is filter out the turn signals and lights up the brake light when...
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  • Wiring a Camper Shell 3rd Brake Lamp Using Pacer Performance PP20-702 Brake Light Logic Module
    According to Pacer Performance, You'll need to confirm one yellow is going to the right signal and the other yellow is going to the left signal. You would also need to check and see if there is any reference voltage left on those lines when not in use as that could be giving the module a false reading. If there is any voltage on the lines, then you would need to install a ¼ watt diode on each yellow line to filter it out. I'd also be sure to review the installation procedure, I've linked...
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