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Deka Reviews and Installation Videos


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Expert Answers about Deka

  • Standard Color Code for Wiring Simple 4 Wire Trailer Lighting
  • You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal. The colors for wiring a 7-way connector are as follows with the 4 colors of the 4-way connector remaining the same. White-Ground Brown-Tail/Running Lights Green-Right Turn/Brake - Remember green has an R in it Yellow-Left Turn/Brake - Remember yellow has an L in...
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  • How to Install a 7-Way Trailer Connector to Add a 12 Volt Power Lead to a Trailer
  • It sounds like you are missing a wire for the running lights on your trailer. Trailers that are wired for lights will have 4 or 5 wires, one for right stop/turn, one for left stop/turn, one for ground and one, possibly two, for running lights. Does your trailer have functioning turn signals, brake lights and running lights? If the two brown wires you mentioned are separate wires from the green and brown and yellow and brown wires, then you have a wishbone harness, which means you have a...
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  • Wiring New 4-Way Connector on Trailer with 5 Wires
  • Going by the colors that you mentioned, it sounds like you have the typical set-up, green wire for right turn and brake, white wire for ground, yellow wire for left turn and brake, brown with green wire for right side running lights, and brown with yellow for left side running lights. If you are using a standard 4-flat connector like part # 18004, you will more than likely be able to connect color for color for the green, white, and yellow wires. As for the brown with green and the brown...
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  • Troubleshooting Error Codes SH and OL on a Tekonsha Prodigy Brake Controller
  • The first error code, SH, you are seeing on the Prodigy Brake Controller (instructions linked below) means the brake wire sees a short circuit during idle condition. The second code, OL, indicates an overload condition during operation. For the first code, SH, the most likely problem is a pinched wire or at some point the wire insulation has cracked or been worn to the point where the copper wire inside is making contact with the trailer frame or another metal part. To find the problem,...
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  • How Do Utility Trailer Lights Wire Up to the Trailer Wiring Harness.
  • The red wire is the turn signal wire and will be run to the green wire of your harness if its the right turn signal side, and the black wire will run to the brown wire of your harness. The yellow wire from your harness will run to the left turn signal red wire. The brown wire will also run to the black wire of this light also. I attached an FAQ on trailer wiring for you to check out also.
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  • Running Lights are not Working on a Trailer with a 4-Way Flat Trailer Connector
  • There are a few troubleshooting steps that you can run through to determine why your running lights are not working. The first step that I would take is to check all of your ground connections. A faulty ground connections can cause many different issues. Check that the ground connections from your vehicle and trailer side connectors and from your trailer lights are attached to a clean, bare metal surface such as the vehicle or trailer frame. If all ground connections are in good condition,...
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  • Recommendation for Locking a Battery Box to a Trailer Frame
  • The Battery boxes we carry, see links, do not include a locking mechanism, but I came up with a solution that would work great to lock the battery box to a trailer frame or any other area you could get a strap around. The Yakima RipCord Multipurpose Strap Lock, # Y04048, would be a great way to lock a battery box. You might want to modify the length of the strap and figure out a way to secure it to the trailer frame, but it would make locking and unlocking the box simple and would be...
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  • How is the Length of the Deka Wire - Jacketed 7-Wire DW04914-1 Ordered
  • The # DW04914-1 is actually sold by the foot. What you would need to do is order a quantity of the length you need and we will ship you out the length you need.
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  • Is 14 Gauge Wire Too Small for Electric Trailer Brakes
  • Yes, 14 gauge wire seems too small. I would go with 10 or 12 gauge. For 10 gauge you can use # 10-1-1 and for 12 gauge use # 12-1-1. These wires are sold in increments of 1 foot. So if you needed 20 feet of wire you would enter 20 in the quantity box. The 12 gauge would be the best option. You mentioned replacing the brakes with the Nev-R-Adjust a year ago. It has probably been long enough, depending on how many miles were put on the trailer, but just to be sure even Nev-R-Adjust brakes...
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  • How to Charge A Trailer Battery When Connected to Tow Vehicle
  • What you are going to need to do is install a 7-way on your trailer so that you can run a 12 volt accessory circuit from the connector to a battery like you are interested in doing. You should note that this will only maintain a fully charged battery. For this route you will need a trailer side 7-way # H20042 and a length of 10 gauge wire to run to the battery. For that you would need part # 10-1-1 sold by the foot. If you are looking for something to actually charge the battery on your...
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  • Wiring New Trailer Tail Lights to a Trailer with Only 2 Wires
  • It sounds like your trailer tail lights you are using now ground through the mounting hardware. That would be why there are only 2 wires. One of those two wires is going to be for turn signal/brake lights and the other is going to be for running lights. To determine which wire is which you can plug the trailer up to a vehicle and have someone step on the brake pedal while you test the wires at the back of the trailer using a circuit tester such as # ALL640595. Whichever wire lights up...
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  • Wiring diagram for Battery Isolator
  • For your battery isolator similar to # DW08771, you will have connection posts for each battery and for an alternator. The main battery will connect to position one and the alternator to the A post. The second battery will attach to the 2 via a circuit breaker that is rated appropriately for the battery. Output from the second battery positive post will then go to the items you want to power. I have included a picture that should help. If you do not have a group 1 alternator then the...
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  • How to Wire Up New Trailer Lights When Wiring Colors are Unknown
  • Since trailer wiring doesn't always abide by the typical wiring color standards I won't be able to tell you exactly where everything needs to go but I can help you figure it all out. Sounds like you have a 7-way on your trailer and the colors for it are standard. Meaning blue is brake output, white is ground, brown is taillight, green is right turn/stop, red is reverse light, and black is 12 volt accessory. I attached a diagram that should help with that. Since I don't know what lights...
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  • Battery Disconnect Switch Recommendation for a Travel Trailer Battery
  • I have a much easier solution for you. Check out the part # DW05312. This will attach to your ground lead and will provide an very easy way to disconnect the lead from the terminal. Check out the review video I attached for more info.
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  • Why Use 10-Gauge Wire # 10-2-1 Rather Than 12-Gauge # 12-2-1 for Electric Trailer Brake Circuits
  • You are correct that Deka Jacketed 7-Wire # DW04914-1 uses 12-gauge conductors for all but the ground wire, which is 10-gauge. There are several variables with trailer brake wiring that we generally do not know when our customers ask about the wire gauge that should be used for re-wiring a trailer's electric brakes. The length of the trailer (and the required wiring) and the number of axles (and brake assemblies) can vary and when we do not know all of the particulars for every installation...
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  • Recommended Battery Isolator For House Battery and Solar Panel Charger
  • For your application, you will want the Deka Battery Isolator - 120 Amp, # DW08771. This will enhance your alternator performance and allow you to efficiantly charge your battery. This will protect your main starting battery from auxilary drain and regulate current for multi-battery systems. We will want the Deka Battery Isolator Installation Kit for Standard Alternators, # DW08769. This kit will give complete instructions, various terminals and connectors, 15 feet of wire and a...
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  • What are the Red and Black Wires For on a 7-Way Trailer Connector
  • Typically, the black wire is 12 volt power and the red wire is left turn/brake lights. But you cannot always go by color. If the wiring in question is on the trailer side then there are two ways to determine which color wire does what function. You can physically trace the wires from the connector to where they terminate to discover their functions. Or you could apply power to each wire using a separate 12 volt battery and see what light or function turns on. If the wiring is on the...
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  • One Side of Trailer Brakes Work But Other Side Does Not But Uses Same Wire
  • It sounds like the left side may have a bad ground in the system or a loose ground. I would check over the complete wiring system and make sure all grounds have a good metal contact and no rust. Also check the wires to make sure the protective coating is not worn and that there are no bare wires exposed. The connector from the vehicle to the trailer could also be corroded, you will want to check inside the connector to make sure. If there is not corrosion, it would be a good...
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  • Wiring a Trailer Mounted Winch to a Trailer Battery and Vehicle Battery
  • I have just what you will need. I have linked an FAQ article that explains the various ways to wire a winch. You will need the second half of the page titled Option 2: Wiring the Winch to a Separate, Trailer-Mounted Battery. I have also included a picture that shows how it would all go together. You will need a battery isolator, # TR118665, some wire like # 10-1-1 or # 12-1-1 sold in 1 foot increments, and a 40 amp circuit breaker # PK54540. You will wire it all up like in the picture. Please...
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  • Troubleshooting Trailer Lights Not Functioning When Tow Vehicle Headlights Are Turned On
  • Since I do not know what tow vehicle or wiring harness you have I will try to give you the best general guidance I can. Usually the best way to troubleshoot your wiring issue is to disconnect the trailer from the truck's 4-pole and test each one individually. However, based on your description of the problem - all trailer lights working until you turn on the vehicle headlights - there is one most-likely cause that should be easy to correct. This type of issue is typically related to...
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  • Installing a Brake Controller on a 2002 Dodge Ram 1500 Equipped with a Factory 4-Way
  • I can help you install a brake controller and finish connecting the wiring for your 7-way plug on your Ram 1500 that came with a factory 4-way. Sounds like you already have the 7-way plug with the factory 4-way wires run, similar to the # 37185. So to complete the 7-way and install a brake controller you will want to get the # 5506 wiring kit. This will include the wire, circuit breakers, ring terminals, and butt connectors you will need to finish the 7-way setup. The center pin wire...
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  • Gauge of Wire for Using as Charge Wire for Trailer Battery
  • For charging a trailer battery you want to go with as thick of wire as you can. 10 gauge would be ideal. We sell 10 gauge wire by the foot with part # 10-1-1. Typically a 40 amp breaker like part # 9510 is used.
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  • Wire Recommendation for Rewiring Utility Trailer with Brakes
  • For the brake circuit of your trailer you will want to run 10 gauge wire like our part # 10-1-1 which is sold by the foot and is standard copper primary wire. We use it all the time here on trailers and it works great. For bonded 14 gauge wire that has 4 wires bundled you would want the part # DW04923-1 which is also sold by the foot. A lot of times people use junction boxes like the part # 38656 to organize the wires on the trailer. Check out the install video I attached for more...
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  • Recommended Way To Power An Electric Winch For Boat Trailer
  • There are a few ways you can wire the winch. The first is to wire it with some quick-disconnects like part # DW05312 to your vehicle battery. Your battery should have at least 440 cranking amps to be able to handle the winch power. The second is to install a winch wiring kit like part # SW2008. One wiring cable attaches to your Tacoma battery. Then you attach the other wiring cable to your winch. These cables have connectors that make attaching the winch really simple when power is...
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  • 4-Way Trailer Wiring Harness has 5 Wires Coming Out of It
  • It sounds like you have a wishbone harness. A wishbone harness has 4 pins like a regular 4-Way but where the wires come out the running light circuit is split so you do not have to run a jumper wire between tail lights. You cannot always go by color. If the wire that is split is right next to the ground pin (covered pin) then this is what you have, a split running light wishbone harness like # A20WB.
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  • Troubleshooting Taillights on EZ Loader Trailer
  • To discover and repair the problem, you'll need to closely examine the taillight wiring system on your trailer. Begin at the connector, and closely examine it for damage or excessive green or white corrosion. Clean/repair or replace as needed. Trace each wiring circuit from the connector back to the lamps on the passenger side. Look for loose connections, pinched wires or wires with worn or cracked wire insulation. Check the main ground connection on the trailer tongue, making sure that...
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  • Brake Lights and Tail Lights Do Not Work on Trailer With 4 Wire System
  • On a trailer that uses a 4-Way wiring harness, the brake lights and turn signals are on the same circuit. So it is strange that the brake lights are not working when the turn signals are. There could be a few different issues going on here, so I recommend starting the troubleshooting process from the beginning. First, with the trailer not connected, check the connector on the tow vehicle for signal using a circuit tester like # ALL640595. This is to make sure that a signal is coming...
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  • Installing a 7-Way Trailer Connector on a 1998 GMC Pickup
  • We have put together a kit that includes all the parts you will need to set up the rear wiring for a 7-Way and prepare the truck to install a brake controller. The kit is part # ETBC7. It will utilize the 4-Way that is already installed and then you will run the included length of 2-Wire up to the front to connect to the brake controller and the the battery for 12V power using the blue and black leads. The purple lead is for reverse lights, if needed, and the white is for ground. I have...
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  • Connecting Electric Trailer Jack Directly to 12V Battery
  • To hook up a trailer jack to a 12 volt battery you need to make the connection from the jack's power wire to the positve post on the battery using a ring terminal, like part # DW05705-1. If you don't already have a battery on the trailer you can add one. You'll need to power it by connecting it to the trailer connector's 12 volt power circuit. You can use part # ET7WK if you need to add a 7-way on the trailer. You'll also need a 7-way connector on the tow vehicle, which I can help...
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  • Parts Needed to Re-Wire Car Hauler Trailer Lights and Brakes
  • We can help you with selecting parts to re-wire your trailer's lights and brakes. Trailer size affects the number and types of lights required to be DOT-compliant. I linked for you an article that covers the lighting requirements for trailers of various sizes. This will help you determine what is required for your specific trailer. For lighting you might want to consider one of our complete lighting kits. Kit # TL29BK uses standard incandescent light bulbs and kit # TLL9RK uses high-efficiency...
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