2002 Chevy Trailblazer Tack

PUDGE68

MEMBER
2002 CHEVROLET TRAILBLAZER

Electrical problem
2002 Chevy Trailblazer 6 cyl Two Wheel Drive 106 K miles

Is the tack hooked up to any kind of sencor in the transmission

Monday, February 16th, 2009 AT 7:30 PM

5 Replies

MASTERTECHTIM

MECHANIC
4,749 POSTS

No, its connected to the ignition module

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Monday, February 16th, 2009 AT 7:32 PM

PUDGE68

MEMBER
4 POSTS

It will work for a while then it will drop to 0 when I stop. If I cut it off and restart it it will work for a few min.

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Monday, February 16th, 2009 AT 7:37 PM

MASTERTECHTIM

MECHANIC
4,749 POSTS

That sounds like a tricky one. My money is on a faulty tachometer itself. How I would diagnose this is to use a scan tool and watch rpm and if it reaads correct when the tach reads zero I would suspect a bad tach

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Monday, February 16th, 2009 AT 7:50 PM

PUDGE68

MEMBER
4 POSTS

I just change transmission filter and fluid iin it and after that is when it started this that is why I was woundering if this could have caused the problem

Thanks

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Monday, February 16th, 2009 AT 8:00 PM

MASTERTECHTIM

MECHANIC
4,749 POSTS

No, not a chance. Double check the wiring by the transmission dipstick tube because thats near the ignition wiring harness to make sure there is nothing touching.