Electrical problems on 79
Thread Starter
5th Gear
Joined: May 2018
Posts: 5
Likes: 0
Electrical problems on 79
the voltage gauge in my 79 was pegged at 18 volts and I believe it fried the tachometer or the ribbon not sure. The alternator was new any ideas what could have caused the gauge to read so high also could it be voltage regulator.
Race Director
Joined: Mar 2017
Posts: 11,953
Likes: 4,510
From: Virginia
Do you have a multimeter? I'd double-check with that to make sure you are getting a real reading.
FWIW, my 80 has some ground issue in the dash (I'm assuming), probably related to the printed circuit sheet, that is causing all sorts of strange behaviors. I don't trust any of the stock gauges to do anything but indicate a change from the norm.
Pro
Joined: Jun 2016
Posts: 567
Likes: 82
From: Auckland
Faulty voltage regulator is possible. I'd remove the alternator and get it checked.
Thread Starter
5th Gear
Joined: May 2018
Posts: 5
Likes: 0
Ok thanks I had just put a new ribbon circuit board for the speedometer,tachometer cluster and the gauge cluster. When the voltage gauge spike and then dropped to 8 ish and then back up to 13 the tachometer stopped and is not on 5rpm with no movement. I have never seen a car with so many electrical problems lol.......
Do you have a multimeter? I'd double-check with that to make sure you are getting a real reading.
FWIW, my 80 has some ground issue in the dash (I'm assuming), probably related to the printed circuit sheet, that is causing all sorts of strange behaviors. I don't trust any of the stock gauges to do anything but indicate a change from the norm.
FWIW, my 80 has some ground issue in the dash (I'm assuming), probably related to the printed circuit sheet, that is causing all sorts of strange behaviors. I don't trust any of the stock gauges to do anything but indicate a change from the norm.
