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Old 05-14-2002, 07:38 PM
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Join Date: Jul 2001
Posts: 14
Question Remote start tach signal...

I am currently installing a remote start unit to my MB 230CE w124 1988, and need a "traditional" tach signal.

The tachometer signal in my car delivers +12V decreasing as RPM increases. The remote start unit needs a voltage increasing by increasing RPM (like when you have a triggering signal for each revolution).

Is there any sensor on my car which I can hook up to to get such a signal? I have heard about a diagnostic output, but not sure if this is correct. If so, could someone tell me the pin-numer for the RPM output?

Thanks in advance!

Anders Eklo - Norway.
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Old 05-14-2002, 08:28 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
On the front of the engine there is a signal. You will have to locate the sensor and follow the wire to the diagnostic connector.
Donnie Drummonds
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