hello, i need to tow a small trailer that may have a max weight of 800lbs. if that. If I wire up the harness, can I tie into the tail lights with additional upgrades to the electrical?

note- I tried searching. already and have not found anything.

 

That is the way U-Haul does it.

 

Ah ok, perfect!

Oh, and I forgot a word so it should've said "no additional upgrades". I don't know if that will change things.

 

There is also a "T" that you can buy and plug into the wiring.

 

As mentioned above, NAPA carries a tee that plugs between the tail light harness, with a flat four pin trailer light plug. Easy as that, no cutting, no splicing. It's about $20.

 

You can buy that same plug in at Wally World for less than Napa.

 

hellz yeah

 

My wally world must have missed that memo because there was no tee plug available. Also, where is this fabled tee plug on the truck so this would be alot easier? I pulled the tail light bulb yesterday and was going to try and test the bulb jack with my multimeter by setting it on the sound so i could hear a result when I try the turning signal, etc. But I was getting ghost readings so I just wired in my leads and just tried a process of elimination with the trailer. I looked through my chiltons for the wiring diagram and that didn't help because it labled the brown and light blue/orange wires as "Stop turning running lights", useless pile of ****. I had both turn signals correct, but I could not get the stop and running lights to work together, it would cancel out each other and turn all the lights off on the trailer.

 

My local Walmart doesn't have them either.

The tail light connector is under the truck, toward the driver's side, around the fuel tank area. My harness had already been pulled out, so I'd be guessing on exact location, but it's in this general area. It's about 3/4" square, about two inches long.

 

Ok, I see a junction of wires that split off three ways, is that it?

 

The factory wiring should only be a straight plug. If it weren't dark here already, I'd get you a pic. If you can wait until tomorrow, I'll climb under mine and take a pic of the factory connection, with the tee harness installed.

 

That'll help and I can wait, thanks for understanding my novice-ness.

 

You pull C401 apart and plug in the "T" to both of C401 plugs.

C401:


C401 location is under LH rear of vehicle, near rear crossmember (F6) in diagram below.


/

 

Subford to the rescue! Thanks, you saved me a trip under my truck in the wind and cold.

And it looks like I was wrong, it's a round connector. Sorry!

 

Man I wish I would have tried the tee plug first. But I'm going to be stubborn and try wiring this myself since I already ran wires from the brake lights.