Truck power to trailer
One of the pins on the 7 pin connector is supposed to supply power to the trailer. Mine doesn’t seem to be working. If I measure the voltage at the battery, it does not go up at all when I connect t...
Forum Discussion
What is the trailer battery voltage with the 7-pin disconnected? Do the lights and fans work with the trailer battery connected, but the 7-pin disconnected?
Need to find out if the 7-pin pos is before or after the DC circuit breaker by the battery pos post before blaming that breaker (or it might be a fuse) since the battery voltage did not rise.
(You said the lights don't work with the battery disconnected, which is to be expected.)
Check the voltage at the 7-pin of the trailer cord (that goes in the truck's) That should be the same as the trailer battery's voltage. If none, find the wires from the trailers 7-pin cord that go onto the battery and see if they are connected to the battery. The ground wire of that cord might not be grounded to the trailer's frame. The positive (pin #4 wire) might join in with another pos wire, and then that wire has a fuse before going onto the battery pos post.
Need to find out if the 7-pin pos is before or after the DC circuit breaker by the battery pos post before blaming that breaker (or it might be a fuse) since the battery voltage did not rise.
(You said the lights don't work with the battery disconnected, which is to be expected.)
Check the voltage at the 7-pin of the trailer cord (that goes in the truck's) That should be the same as the trailer battery's voltage. If none, find the wires from the trailers 7-pin cord that go onto the battery and see if they are connected to the battery. The ground wire of that cord might not be grounded to the trailer's frame. The positive (pin #4 wire) might join in with another pos wire, and then that wire has a fuse before going onto the battery pos post.
