Trailer Lights Not Working when Connected to 2008 Chevy Express 2500 w/Factory Tow Package

Question

Question:

I have factory installed 7 pin trailer plug. I only have access poer to the plug. No turn, brake , running. I checked 30 amp fuse for trailer plug and fuses user driver seat dont see any issue. Any suggestions?

asked by: Cory A

0

Expert Reply:

First we should make sure we have checked all of the fuses and relays related to the factory tow package wiring on your 2008 Chevy Express van. Under the hood there are the following fuses related to the tow package wiring:

Location 8 = right stop lamp, trailer turn signal
Location 16 = left stop lamp, trailer turn signal
Location 35 = Trailer wiring (this is a very ambiguous description and just might be the culprit)
Location 62 = Trailer wiring (see above)

Oddly enough there isn't a separate trailer running light fuse so it is either tied into one of the ambiguous "Trailer wiring" fuses or connected directly to the vehicle running light circuit.

If none of those are the issue then inspect the wiring itself as much as you are able and fix any damaged or pinched wires as needed.

expert reply by: Michael H

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Answer 1

Your brake lights and turn signals for each side are on one circuit. The left side turn signal and brake light is generally the yellow wire going into your trailer connector. The first thing to do is check the fuses on your tow vehicle. Next,…

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Answer 2

There are any number of reasons that you are not getting power on the green and yellow wires. If this is on the trailer side, the first step would be to test the vehicle end 4-Way trailer connector to see if power is at least getting to that point.…

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Answer 3

I can give you a number of troubleshooting steps as it seems like there are lights everywhere not working, though it was difficult to differentiate exactly which ones so here the steps you'll need to take. The first thing to do is take a look at…

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Answer 4

I would start troubleshooting at the connector itself. Take the connection apart and make sure there are no bent pins or corroded terminals that could cause the tail light function not to work. Next, I would check the fuse block under the hood of the…

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Answer 5

The Tekonsha P3 part #90195 is a great brake controller and would work well in your 2014 Chevy Express Van. There isn't a custom fit adapter for your vehicle to install a brake controller but I can help you wire your controller in. Express Vans…

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Answer 6

I took a look at the online version of the owner's manual for your 2012 Chevy Silverado and it only listed a couple of fuses for the two non-working trailer light functions you mentioned on the truck; the #3 fuse for Trailer Left Turn/Stop and…

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Answer 7

There is not an industry standard layout for wiring the 4-Way round pin connector, but there is a layout that is most accepted. If you you are looking at the front side of the 4-Way round trailer side plug, the top left prong would be used for right…

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Answer 8

Looks like you have a round 4-way connector in the picture you submitted. The colors you mentioned aren't totally a match for standard colors but they are close. Normally the colors are: White - Ground Return Green - Right Turn and Brake Lights…

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Answer 9

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 10

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 11

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 12

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Trailer Lights Not Working when Connected to 2008 Chevy Express 2500 w/Factory Tow Package

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