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volt gauge keeps burning out?
1981 cj7 jeep replaced all the dash components,including the speedo ,new wiring kit, installed new alt.Everything checks out running 12 volts.Everything works fine.Had to replaced alternator gauge 2 times keeps burning out.It works for about 10 minutes then get no reading.Any ideas why ?
gauge was showing 12 volts when it worked then dropped to -0- after a few minutes..hope that is some help
2 Answers
- bobwebLv 79 years agoFavorite Answer
If the gauge reads DC Voltage, it's unlikely that it's "burning out". More likely is an "open circuit", meaning the wires leading from the voltage source have an intermittent discontinuity or open circuit which keeps the current from flowing through the meter. Test the meter itself directly on any household battery or to the car battery to see if it reads the correct voltage.
If the meter is an Ammeter (reads current in Amps) rather than a Voltmeter, it's possible to burn it out if your hooking it directly from the battery to ground and exceeding the maximum current flow shown on the meter face.
Source(s): Electrical Engineer - J JLv 79 years ago
You said you replaced the wiring harness and I think it is in the harness. Check with the manufacturer of the harness to see weather it is wired for a volt meter or a amp meter. I think you will find it is wired for a amp meter and you have a volt meter. If when it was working for the ten minutes it was pegged over to the highest volt I know that was your problem. Did you notice?
