I've been chasing electrical issues with my 12/73 FJ40 since I bought it. Symptoms are:
- blows 20A heater fuse and lose my gauge lights and my fuel, oil, water temp gauges, but only while driving. I can't tell if it's at higher RPM or? But everything works great while Key On, Engine Off in my driveway or while idling.
- Harness is a refurb from @Coolerman, new Alt, New VR.
- Blinkers blink fast, and charging indicator moves to the left in rythmn with the blinkers. Flasher is the new relay style.
- Alternator has a 3 blade connector in the rear. VR is also a 3 terminal connector. Harness only has 2 wires that go into the alternator
- Brown discoloration marks are on the blue/white wire coming off of the alternator