Rpm Activation

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=59371
Printed Date: May 20, 2025 at 5:35 PM

Topic: Rpm Activation

Posted By: greggpb8
Subject: Rpm Activation
Date Posted: July 13, 2005 at 3:32 PM

I dont know if this is the right place so i am gonna go ahead.. I wasnted to ge a circut to read the pulses in a cars electrical system.. from any dc out let ie the ligher and from this determine the spm..

an ideas....

or a pointer in the right direction..what to look for ?

Replies:

Posted By: ff-mike
Date Posted: July 14, 2005 at 3:57 PM

I don't think you are going to find it at just any outlet. What you are looking for is the tach signal. Use the Vehicle Info Database to find the wire

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