The background: I have a 1972 Overlander. The light over the outside of the door didn't work.
The project: To simply remove the old bulb and and replace it with a fresh new one. To make it a great job, I'll even waterproof the casing.
What happened: After removing the casing I found that the whole fixture was rusted out. There wasn't even a bulb. I checked the black & white wire and there was 13.2 volts. I went to the autoparts store and got a new bulb fixture. I installed the fixture, soldered the wires and covered them with shrink tubing. I tried the light switch and nothing! I disconnected the wires and checked the voltage on the black & white wires. Zero. I checked the 4 fuses in the hum box and one was blown. Back to the autoparts store for new fuses. Just for good measure I replaced all 4 of them. I got into the trailer to see if anything else was amiss. I now had no 12 volt
electricity to the reading lights the outside spot light or the front vent light. I again pulled all 4 fuses and checked them. They were OK. I still have no voltage to the front of my trailer. I DON'T want to pull the inner panels to look for a disconnected wire. Does anyone know of another fuse or coupling that is in or under the trailer? I need help.