Help troubleshooting ammeter
Thread Starter
Intermediate
Joined: Oct 2014
Posts: 37
Likes: 1
Help troubleshooting ammeter
I've been working on my '76 and all the gauges work except the battery gauge. I replaced the gauge with one that was known to work and I still get nothing. It just stays dead in the middle. The wiring appears to be untouched in the dash. Can someone with experience tell me the best approach to tracing down the problem?
Burning Brakes
Joined: Apr 2008
Posts: 1,222
Likes: 93
From: shelbyville West Michigan
I don't have the wiring diagram in front of me, but usually an ammeter gauge goes between the alternator output stud and the battery (or starter solenoid where it connects to the battery cable).
do you have voltage across the terminal from the alternator side (when running)? What is the output of the alternator? (it may not be putting out more voltage than the battery).
does it show discharge when key on/engine off? if not, you may have to get the diagram and chase the wiring...
do you have voltage across the terminal from the alternator side (when running)? What is the output of the alternator? (it may not be putting out more voltage than the battery).
does it show discharge when key on/engine off? if not, you may have to get the diagram and chase the wiring...
Thread Starter
Intermediate
Joined: Oct 2014
Posts: 37
Likes: 1
I don't have the wiring diagram in front of me, but usually an ammeter gauge goes between the alternator output stud and the battery (or starter solenoid where it connects to the battery cable).
do you have voltage across the terminal from the alternator side (when running)? What is the output of the alternator? (it may not be putting out more voltage than the battery).
does it show discharge when key on/engine off? if not, you may have to get the diagram and chase the wiring...
do you have voltage across the terminal from the alternator side (when running)? What is the output of the alternator? (it may not be putting out more voltage than the battery).
does it show discharge when key on/engine off? if not, you may have to get the diagram and chase the wiring...
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
Before you tear the dash open, check the two fusible links in the circuit. One at the horn relay and the other near the wiper motor coming out of a connection on the heavy red wire.
