Problem with outside lights
Hi there. Just recently on my way back from camping my running lights wouldn't work while I was towing my travel trailer. The back lights would turn on if I hit the breaks, but the running lights, the...
Forum Discussion
kaulana wrote:CaptPicky wrote:
Go buy you a multi-tester at Wally World or Radio Shack. Start at the beginning. Make sure your wiring connector on your truck is working. Test each connection. Then start working your way down the line towards your trailer. There probably is a broken connection somewhere along the line.
I got a tester and started at the tv connection. With the lights ON on the truck, two pins read between 50-60 volts and the rest were zero. So this must be a problem with the fuse on the TV then? I found the fuse box near the engine, and found which two fuses control the trailer hookup, but not sure what to do next.
Do I replace these? Should I just take my truck in to the shop? (I tried to get the fuse out by tugging lightly, but it didn't budge and I didn't want to break anything)
Thanks again
What kind of truck is it?
Are they blade fuses or cartridge fuses (looks like this)?
Either way, they just pull out. Sometimes, they can be a little stubborn. You should be able to see if a cartridge fuse is blown.
Simple test you can do on the trailer. Look at the pictures above (7 blade connector, trailer side). With trailer battery connected, use a 10 amp blade fuse to connect the top two terminals on the trailer umbilical cord. If trailer wiring is good, your running lights will come on. If they light up, your problem is in the truck. Fuses, most likely.
Trailer tail, brake, and running lights get their power from the truck. Running lights are on a seperate circuit from brake / tail lights.
