Am I Supposed to See 12V at the Tail Lights?
Re our Coachmen Freedom Express 192RBS: I have a verified measurement of only 10.39V at my left rear tail light. I am producing 13.9V from my 7-pin connector on our Ridgeline at the tail light term...
Forum Discussion
dougrainer wrote:
WHAT is the voltage at the front 7 way Bargman. What is the voltage at the other Tailight or any of the clearance lights? Garbage IN Garbage out. If the input is below 12 volts, then you have something wrong with your truck/tow supply. The VOLTAGE at all your lights comes from your Tow vehicle. NOT from the RV. You should have at minimum 13.1 volts with tow vehicle running at all lights. Doug
I'm with Doug on this one. You need to use your meter with someone's foot on the brake and measure the voltage from green (brake/turn hot wire) to white (negative/ground).
If you have the same voltage at that point, then while the brake is still held down measure the voltage on the other side of the camper.
If it's the same there, then go to the front at the output of the truck and when disconnected, put your meter leads into the proper places on the plug and if you still have the same there you are getting closer to the problem.
With electrical things, first you prove you actually have the problem you think you have, then you systematically troubleshoot either forward or backward until you isolate the specific area where the problem really occurs.
