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Old Nov 26, 2022 | 02:08 PM
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Default TACH Pegged out

I have a 79 L82 and I noticed today that my Tach needle stays at or above 7000. has anyone else had the issue? I have been having problems with my center gage cluster for a while now. The voltmeter and fuel gage stopped working and I just changed the Circuit board.

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Old Nov 26, 2022 | 02:11 PM
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Accelerate the engne above mid point rpm..sometimes they park on high side and quickly reset when rpm is past halfway point..

also make sure you don’t pinch the circuit board pins when installing…easy to do as it is very tight


Last edited by interpon; Nov 26, 2022 at 02:21 PM.
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Old Nov 26, 2022 | 02:21 PM
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This is my 79 l82 view…reference..i am pretty sure you have the center console pic?
why did you replace old board? Did you save it?
i even tack glued my tabs to stay in place as they are easily damaged or bent




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Old Nov 26, 2022 | 02:28 PM
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This is center console..tight space makesure not bent as above
reference my 79 l82


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Old Nov 26, 2022 | 03:16 PM
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I do not have my original board. it was really bad, and the original owner had done all kind of repairs on it. So, I bought a board from eBay, and I shorted it out and it had a brake it one of the copper strips. ( I didn't disconnect the battery first) before hooking up the wire harness. I think my voltmeter may be damaged.
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Old Nov 26, 2022 | 03:19 PM
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Could my resistors be shorted out? if so, how do I check the resistors? Thank you
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Old Nov 27, 2022 | 06:44 AM
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It’s possible but unlikely that the resistors are your problem. The meters are much more delicate than the resistors. If you shorted something to the point you melted a copper strip on the printed circuit, I’d be looking at the gauges.
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Old Nov 27, 2022 | 08:21 AM
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You must remove the resistor your testing from the cluster.
Ohm across the 2 mounting points
From Willcox Corvette, Resistor Color & Values Chart LINK: http://repairs.willcoxcorvette.com/c...stor-and-ohms/
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Old Nov 27, 2022 | 02:01 PM
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Thank you
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Old Dec 3, 2022 | 08:22 PM
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Thank you. Probably the gages!
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Old Dec 19, 2022 | 11:52 AM
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Thank you sir.
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