Having a problem fixing the tachometer on my 95 pontiac bonneville. Can you help?

1995 PONTIAC BONNEVILLE
126,000 MILES
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LEISER13
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  • 2 POSTS
When turning the ignition on the tach has power. I've replaced the interrupter the cam sensor, crank sensor and the dash cluster. I checked all wires going to the ignition module and to the back wall. I don't know where to go with this. I'm thinking its not getting a signal from the module. Or do you have anyother suggestions.
Nov 19, 2011 at 6:58 PM
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KHLOW2008
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  • 41,814 POSTS
The ignition module should send a pulse to the tachometer when engine is runnig. Use a DVOM to check for pulsing voltage at the White wire from the Ignition Module to test if it is sending the signal.
Nov 19, 2011 at 8:42 PM
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LEISER13
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Ok replaced the module and we now have a signal coming from the white wire for tach. However still nothing going on with tach. Is there a relay or does the computer send the signle to the tach.
Nov 28, 2011 at 8:07 PM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
You would need to test the tachometer and if it is bad, the meter cluster would have to be replaced.
Nov 30, 2011 at 8:31 AM
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