Dead RV trailer battery when getting home
Hello. We did a 2 night camp for the first time without power hook ups. We have a new 12v battery and everything worked perfectly. The trailer power said full power still when we left the campground,...
Forum Discussion
Iraqvet05 wrote:
GM is notorious for not equipping the Silverado and Tahoe lines with the proper fuse and/or relay for the trailer the trailer charge circuit and aftermarket brake controller wiring harness....in fact, they leave the wires disconnected near the distribution box under the hood. Check eTrailer and Google for your specific truck relating to this. I know many GMs have to be in tow/haul mode for the circuit to energize also.
Not true at all on any GM truck I've owned ... yes, you might have to add a fuse to Stud #1 in the under hood fuse box and although I know that during some model years the charge line wire itself sometimes was left disconnected during the vehicle assembly that's never been the case on any of the 3 GM trucks I've owned. GM doesn't use a relay in the charge circuit as does Ford, again at least not on any of the trucks I've owned. Also, this charge line (+12 vdc) on Pin 4 of the Bargman connector, once activated, is hot all the time, even if the truck isn't running, and has nothing whatsoever to do with whether the truck is in Tow Haul mode or not.
Bargman 7-pin Pinouts
