Gauge Problems 1966 F100
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Cross-Country
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Gauge Problems 1966 F100
I'm having troubles getting my gauges to work. Both the gas and temp gauges have become unresponsive. When I'm measuring voltages to the gauges, I'm hearing a buzzing sound like a loud mosquito. I would think it was the 5V regulator (which is electronic), but I replaced it with a new Dennis Carpenter one and it didn't change anything. Buzzing still there/intermittent. When the buzzing is happing, the 5V is very unsteady. I was concerned about the ground to the dashboard so I installed a dedicated ground wire. Still no fix. Anyone seen this one before? It used to work just fine.
Lead Gopher
Joined: Aug 2012
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If either gauge’s internal coil partially shorts, it loads the IVR so heavily that the IVR oscillates, the 5V line becomes unstable, both gauges appear dead and buzzing occurs.
To be sure it is the IVR that is buzzing take a short section of something like heater hose and hold one end to your ear and the other end to the IVR just to be sure that's where it is coming from.
Assuming so the next thing to do is unplug the two gauges and see if the buzzing stops. If yes, then plug back in one gauge at a time and see if you can determine which one is causing the buzzing.
Hopefully that helps isolate the problem a bit more and gives you a direction to head with it.
To be sure it is the IVR that is buzzing take a short section of something like heater hose and hold one end to your ear and the other end to the IVR just to be sure that's where it is coming from.
Assuming so the next thing to do is unplug the two gauges and see if the buzzing stops. If yes, then plug back in one gauge at a time and see if you can determine which one is causing the buzzing.
Hopefully that helps isolate the problem a bit more and gives you a direction to head with it.
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sre8212
1961 - 1963 F100 Unibody
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Jul 13, 2015 06:07 PM
