Connecting Battery Kills 12v System
Maybe this has been answered already, if so maybe someone can point me to the post. We're on a 3 week cross country trip with the kids in a 31' Jayco travel trailer. Had our battery system give us...
Forum Discussion
jfeltham wrote:dougrainer wrote:
On Jayco, there is a 30 amp ATC fuse. This fuse is between the Battery and the INSIDE fuse panel. It is located in 2 places depending on the Year Jayco. On a short pigtail within 10 inches of the POS post of the battery. OR, on the front of the trailer ON the cross frame, there is a 4 by 4 metal box and coming out of that box is that 30 amp ATC fuse. IF that fuse is blown(it is) replace it, Your problem is solved. Also, if that fuse is blown, your truck will not charge the battery in transit. Doug
30 amp fuse on POS line is good.
So strange. everything works as it should when connected to 115v.
Shut off 115v and connect the battery, and all 12v stops working whether or not 115v is connected.
Follow-up question...what is the Yellow line on the NEG cable? It has a 35amp in-line fuse. When connected, it gets very warm.
You have already figured it out. You have the POS and NEG wires reversed at the battery. THAT will teach you to not label or take a pic of the cables before you disconnect them. Doug
PS, the yellow wire is usually the tongue jack fuse. It is wired direct to the battery.
