dogbiscuit
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Hi, is there a process to troubleshoot a non-working factory tach?
Trouble shooting tach
- Thread starter dogbiscuit
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69 Cougar XR7 460/C6
Not really. If you unplug the tach and use an ohm meter across the two leads you should get resistance. If no resistance the board is bad.
If you have resistance of 1 ohm and the car will start and run but the tach doesn't move, yup, you guessed it - the board is bad.
If the needle doesn't move freely (float) the movement is bad.
If you have resistance of 1 ohm and the car will start and run but the tach doesn't move, yup, you guessed it - the board is bad.
If the needle doesn't move freely (float) the movement is bad.
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