RPM Signal - 60DegreeV6.com

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95-GAGT

Join Date: Dec 2003

Posts: 4
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#1

RPM Signal

03-31-2004, 04:12 AM

I am getting a HKS SAFC this week, and I need to know where my ecm gets the RPM signal from. If you know, please let me know.
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bszopi

Site Coder

Join Date: Apr 2000

Posts: 9152
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#2

03-31-2004, 09:52 AM

The ICM. Its one of 2 white wires... not sure which one off hand though.

-Brad-
89 Mustang : Future 60V6 Power
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RacerX11

Join Date: Oct 2003

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#3

03-31-2004, 01:31 PM

It is pin C. See attached diagram. There may not be a wire in the connector for the tach signal, in which case you would have to add one.

Marty

'99 Z-28 - Weekend Driver
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95-GAGT

Join Date: Dec 2003

Posts: 4
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#4

03-31-2004, 08:50 PM

Would I go with the signal going into the ECM (423) or the signal to the dash (121)?
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bszopi

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Join Date: Apr 2000

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#5

03-31-2004, 09:04 PM

ckt 121 (pin C)

-Brad-
89 Mustang : Future 60V6 Power
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