7pin wiring problem. Please help!
I have a new to me travel trailer. I am having a few issues with the wiring. Let me list those and then I'll list what I have done so far. 1. When headlights are on, running lights are not. 2. Whe...
Forum Discussion
drsteve wrote:Djsrcy wrote:
okay. When the wife gets home I will use her battery and a couple wires.
So I will connect a wire from her car's negative post to a known ground on the CAMPER and then connect a wire from her car's positive post and touch each wire on the 7 pin. correct?
That is what I would do at this point, to ensure that the problem is not a miswired trailer plug. Remember not to touch the 12v to the ground pin in the connector.
While I agree with YC-1's post above, I think you are better off starting with drsteve's post about testing each wire one at a time.
Definitelygrab a notepad and make a map of what each wire position on your tow vehicle controls. Make sure you write down each blade position, do not rely on any pre-printed diagram. Then ask your wife to stand behind the trailer and call out lights as you test each pin on the trailer. Write down each wire position from the trailer and I bet you'll find that the trailer plug is miswired.
a few tips.
She can tell the difference between a taillight and a brake light because the tail lights will also light up all the side and top marker lights.
When the side and top marker lights go on, the two tail lights should be the same brightness. If one tail light is considerably brighter that the other you most likely have the bulb installed 180 degrees in the brighter bulb socket.
If you have any lights that just will not turn on, or one is brighter than the other, then go back and follow YC-1's testing.
