Tach - Help

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Nov 22, 2005 | 11:57 AM

Darrel1

Thread Starter

Racer

Joined: Oct 2005

Posts: 457

Likes: 1

From: Royal Oak Michigan

Tach - Help

I have been diagnosing a dead battery problem on my 1980 L48 and determined it was a bad battery. Installed the new battery last night and started the vehicle. The tach immediately went all the way to the right and does not move from there. It was working fine the previous day.

I have done a thread search and I am not sure what is the problem.

If the circuit board is bad, would the tach stay to the right or default back to Zero and stay there?

If the filter was bad I think I should get some erratic movement?

If there was no power would it stay to the right?

Need help?

Darrel1

Nov 22, 2005 | 12:00 PM

kona

Drifting

Joined: Oct 2003

Posts: 1,330

Likes: 1

From: Kerrville Texas

If the filter was bad the Tach would be acting eraticly not pegged to the right. Is it possible you shorted something out when installing the battery?
Also did you ever jump start the car? I have seen this cause electrical Gremlins.

Kona

Nov 22, 2005 | 12:03 PM

Darrel1

Thread Starter

Racer

Joined: Oct 2005

Posts: 457

Likes: 1

From: Royal Oak Michigan

I have never jumped the car, but I have had a 4 amp charger connected to the battery while intstalled to get enough juice to start the car. Could this have caused it. And what would have went bad - the board, fuse??

Nov 22, 2005 | 12:50 PM

kona

Drifting

Joined: Oct 2003

Posts: 1,330

Likes: 1

From: Kerrville Texas

Always check the fuse first it is the easiest and cheapest thing to do I don't think a charger would cause your problem.
Next thing I would checkis all your connections then the circuit board for the tach.

Kona

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