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Voltmeter stopped working

Tiny
TWEBB101
  • MEMBER
  • 1984 CHEVROLET TRUCK
  • 7.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 169,000 MILES
My voltmeter gauge is having issues: it was working great, and then while driving the truck, the needle just jumped to 3 o'clock. When I turn the truck off, the needle goes back to 0; turn the key on. Back to 3. It's getting power, but no signal. I've checked all the wires, but no luck. Is there a fuse, or something else going on?
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Sunday, February 20th, 2022 AT 9:06 PM

9 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

There is no signal. It is just a voltmeter that reads the voltage of the battery from the wiring.

Use an external meter to verify the actual voltage. From the sounds of it, the dash unit itself is the issue. It could be the printed circuit board or the connector at the dash itself.

Roy
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Monday, February 21st, 2022 AT 2:18 AM
Tiny
TWEBB101
  • MEMBER
  • 178 POSTS
Would I use the voltmeter on the battery, or somewhere else?
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Monday, February 21st, 2022 AT 8:53 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, the battery.

Roy
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Monday, February 21st, 2022 AT 9:37 AM
Tiny
TWEBB101
  • MEMBER
  • 178 POSTS
12.83 at the battery currently.
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Monday, February 21st, 2022 AT 10:25 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, then most likely either the connector or the cluster itself.

Roy
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Monday, February 21st, 2022 AT 10:40 AM
Tiny
TWEBB101
  • MEMBER
  • 178 POSTS
Pulled the gauge out, tested the clips, and was getting 12v to the gauge. Put a different gauge in, worked like a charm. I guess the new gauge went bad.
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Saturday, February 26th, 2022 AT 11:02 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Correct.

Roy
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Sunday, February 27th, 2022 AT 4:14 AM
Tiny
TWEBB101
  • MEMBER
  • 178 POSTS
Well, just lost the replacement voltmeter gauge today. Exact same behavior as the first one: working great, then all of a sudden, it’s at 9 o’clock. Is it getting too much voltage?
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Saturday, March 12th, 2022 AT 5:58 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, either the connector at the back of the cluster or the printed circuit board inside the cluster is the issue.

Roy
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Sunday, March 13th, 2022 AT 1:45 AM

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