Charge Line
A recent message said that while I am on the road my truck is actually not doing very much charging of the batteries in my 5'er. The trailer carries two group 27 deep cycle batteries. The poster sai...
Forum Discussion
Charlie D. wrote:
Is this a new problem? The 2006 D/A did NOT come with a fuse installed to charge the batteries. 50 amp fuse is needed. Perhaps it is blown if it is a new problem. Pull the fuse panel cover on the drivers side under the hood above the tire. IIRC, it is the second slot from the top left. About 1/2" square.
It is critical that the battery is charged because it engages the brakes in the event of a trailer disconnect.
Actually a 40 Amp fuse in the UBEC (underhood fuse panel) to protect Stud 1 output to the RV 7 way trailer plug terminal 4.
My truck is same as OP except extended cab and it charges the 4x6v batteries in my toyhauler fairly quickly driving on the way home from a camping trip. Performance can be improved by installing larger wire but that may load the Alternator too much for reliability.
The GM wiring scheme does put the truck starting batteries at risk of discharge when camping if the RV 7 way is left connected to the truck. I always disconnect unless overnighting in a parking lot or rest area.
