An embarassingly basic blinker question
I have a 1995 E-350 Girardin bus. I replaced all the rear lights with LEDs, and I included the appropriate resistor for the flashers to prevent hyper flash. And everything worked great.
Until our last trip, when, while driving through San Francisco, I noticed the left blinker started hyperflashing. Once I got home, I checked the blinkers, and sure enough, the front left blinker hyperflashed, and the aft blinker did not come on at all. The right side worked just fine. I can't remember what happened when turning the hazards on. I pulled the panels and checked the voltage on the wires for the aft left blinker and there was no electricity getting back there.
I replaced the flasher relay with a brand new one for LEDs. This eliminated the hyperflash, but everything remained the same--front left, right side, hazards all work fine, and there still no juice coming to the back left side.
So before I start pulling wires out of the walls, I want to check with the experts here. The left blinker has two yellow wires; one comes from below, and the other from above. I understand that this is probably a full circuit that runs from the relay, back to the blinker, then up to the front, right? This being an E350, I imagine that the wire that sends the signal back runs along the bottom, right? Basically, should I check the lower wire first, or the upper wire? Since no electricity is coming back there, it's clear that something is wrong between the relay and the blinker, and not on the return (or am I wrong about that?).