Tail light wiring questions? 2004 Silverado 2500.

[PNW_Steve]

Hello All,

I purchased a 2004 Silverado 2500 with no bed on it. I found & mounted a 2009 bed on it.

When I got to the tail light wiring I found that the connectors that go from the tail light wiring to the junction point mounted to the frame had been cut off.

I have been searching online and only managed to confuse myself more.

There are 3 connectors on the junction that look almost the same. They are all 8 position but 2 of them only have 7 pins the third has 8 pins.

I found the mating connector online but am uncertain as to whether the two 7 pin connectors are Right & Left or the 8 pin runs both. I am totally confused as to which, if either, is correct.

Can anyone clue me in as to which connectors to use & wiring details?

Thanks.

[PNW_Steve]

The info that I am finding online has me confused.....

 

Replacement harnesses show a single connector for each side. My existing wiring appears intact except for the mission connectors. It has a bundle of 4 wires coming from each tail light up to the junction board.

 

The Junction board has 3 available connectors and the pictures that I have found show all three connectors being used. 

 

I have two bundles of wires that go to the left & right tail light assemblies.

Left: Brown, Yellow, Lt Green and Black

Right: Brown, Dk Green. Lt Green and Black

Thoughts? Suggestions?

[davester]

I believe the third connector is used for the harness going to the license plate light.

 

C2(Gray connector) is for left side lights, C3(brown connector) is for license plate, C4(black connector) is for right hand lights.

 

At least, that's how it's described in my '04 Sierra full-service manual.

 

I would suggest going to a junk yard and either getting the harness off a bed (better) or cut off the right connectors and then patch them to your wiring.

 

I don't know if the '09 connectors are the same as the '04 connectors, wouldn't surprise me if they use different connectors.

[PNW_Steve]

15 hours ago, davester said:

I believe the third connector is used for the harness going to the license plate light.

 

C2(Gray connector) is for left side lights, C3(brown connector) is for license plate, C4(black connector) is for right hand lights.

 

At least, that's how it's described in my '04 Sierra full-service manual.

 

I would suggest going to a junk yard and either getting the harness off a bed (better) or cut off the right connectors and then patch them to your wiring.

 

I don't know if the '09 connectors are the same as the '04 connectors, wouldn't surprise me if they use different connectors.

Thanks Davester.

 

That does clarify things a bit.

 

+1 on the wrecking yard. NAPA wants $225 for 3 of the connectors.