So was getting the '75 ready to finally take to the alignment shop and did a safety check and noticed that the turn signals weren't working. Everything was fine except those. 4 ways - fine, brakes - fine, and when actived, turn signals disabled brakes lamps even when in Key off. Narrowed it down and verified I had a dead short between the flasher and the column connector somewhere in the underdash harness. The dilema I have is that there are two smaller wires coming out of the flasher to the body harness and a single larger wire shows up at the column connector. All my diagrams show that this should just be a home run between the two with a single light blue wire (wire colors are correct at both ends). Any thoughts on just cutting out the harness wire and putting a new jumper wire to home run between the flasher and the coumn connector? I can't envision anything else that should split off this feed to the turn signal switch. Thanks, and glad to finally be getting back to the mav and getting it ready for our Arizona meet up.
Almost always when there is a problem with turn signals.....it is the switch itself that needs replaced.
Actually spent a lot of time double checking my trouble shooting and figured out a couple things. 1. I remembered that I really, really hate laying on my back trying to work under the dash! 2. Old wires fade.... the wires I was looking at were not the correct indicator colors. I was looking at the emergency flasher wires not the turn signal (the two flashers are side by side on my car). The two wires in to the connector were actually the power feed and the other wire was out to other uses like wiper switch for the turn signal flasher. The single wire is the output from the flashers. This should have given me a clue to look closer (see # 1 above). 3. The turn signal wire out of the flasher to the column is light blue, the power feed to the emergency flasher is light blue with white stripe... dang, got them confused as I missed that white stripe so all my trouble shooting for the turn signals was actually on the emergency flasher circuit. Only cost me 4 fuses to finally force me to figure this out! (see #1 above) 4. There is definitely a grounded out wire as the flasher fuse kept blowing even with no flasher in the connector. The grounded wire is on the power feed between the fuse box and the windshield wiper control so I still have to pull cluster out and find a way to power the windshield wiper or find the actually shorted wire, but thats not essential at the moment. So did wind up bypassing the wire from the flasher to the column since it was already in place and connected to an alternative power wire and now have normally working turn signals.
