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OBD1 RPM signal

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Old Oct 19, 2009 | 12:03 AM
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NAEGH22
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Default OBD1 RPM signal
Need to get an rpm signal for an aftermarket tacho.

Is pinout A21 - ICM what sends the signal to the factory tacho in the cluster or does it get the signal directly from the dizzy? If so, which wire?

I've been searching but i'm stuck....

Thanks for any help
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Old Oct 19, 2009 | 05:48 AM
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Default Re: OBD1 RPM signal
Blue lead at "dizzy". 94
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Old Oct 19, 2009 | 04:21 PM
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Default Re: OBD1 RPM signal
^ x2
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Old Oct 19, 2009 | 08:54 PM
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Default Re: OBD1 RPM signal
from the two pin plug, right?
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Old Oct 19, 2009 | 09:03 PM
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