Lights!

When we towed the Nimble back to Vero Beach the other day we noticed that the lights on the newly wired trailer light bar weren't working properly. After arriving back in Vero Beach, we checked the truck lights and found one of the parking lights was out.  Could this be the reason the trailer lights weren't working? Replacing the bulb is not easy. The battery and battery plate must be remove for access to the bulb. We took it to the local Ford dealer. They checked all of the lights and found one of the back up bulbs was out too. The guy at Ford didn't think the burned out bulbs had an effect on the trailer lights. We used our tester to discover that burned out bulbs do make a difference. The tester showed that the turn signals and the stop lights were now functioning properly.