Chevy / GMC trailer fuses

[sportner]

This may have been brought up sometime in the past but its new to me and I thought I would pass it along. Did you know that Chevrolet and GMC trucks have separate fused circuits for trailer connectors? My running lights worked fine on our 2006 Chevy truck but wouldn't work on the trailer, I tracked it down to a blown fuse under the hood that is just for the trailer, at the same time I found another blown fuse to the trailer for the backup lights, this is the circuit that goes to the backup solenoid disconnect that allows you to backup without activating the surge brakes (a pain in the butt for two years now). I have extra fuses but I think I will make a point of disconnecting the trailer each time it goes in the water, I never thought it would matter because the lights are all sealed but something must make it short out.

[SGIDave]

Along the same line - I noticed my left tail/turn/stop light was NOT working on my boat trailer. This was when connected to the 2004 Chev Suburban 1/2 ton. I couldn't find anything wrong with the trailer lights. Over time, I found that my cargo trailer had the same problem. So I got out my multi meter and there was no power from the corresponding prongs in the (factory installed) trailer plug.

So I took the Suburban to the mechanic and he fixed it. It was a fuse under the hood as well. I'd never heard of that.

/david

[SEA3PO]

Yep they use seprate fuses for the trailer.... good idea I think...I had to find that myself....just could not understand why the truck tail lights would work and the traier lights would not.... now I carry extra fuses...but the real answer is to unplug the trailer before diping er in...

Joel
SEA3PO

[DaveS]