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2003 mazda protege 5 alt sense

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=94864
Printed Date: July 17, 2025 at 6:53 PM


Topic: 2003 mazda protege 5 alt sense

Posted By: shaip99
Subject: 2003 mazda protege 5 alt sense
Date Posted: June 17, 2007 at 10:59 AM

i am sorry if this is a duplicate message i have tried to post this twice now but it never comes up

anyway

i just completed installing a compustar pro 9000 series starter/alarm into my car now the only problem i am having is that the unit is not sensing the tach wire at the diagnosic plug on the left side of the engine it is the purple white wire does anyone know where to find the alternator sense wire i tried to go directly to the alternator and i managed to get to it but there are only 2 wires that i can see and neither test for correctly

thank you for any help

shai



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Replies:

Posted By: peterubers
Date Posted: June 17, 2007 at 12:34 PM

NOTE *2 THE DIAGNOSTIC CONNECTOR IS IN DRIVERS SIDE REAR CONER OF THE ENGINE COMPARTMENT.CAN ALSO FIND TACH IN PIN 48, OF THE ECM (ELECTRONIC CONTROL MODULE).

Try the tach pin before you try alternator sensing --

Did you try VMM testing the PURPLE / white wire?  What voltage was it?  did it vary in voltage with increasing/decreasing rpms?



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