alternator putting out 18 volts?

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01-19-2015 | 08:39 PM

amandampierce13

Thread Starter

Junior Member

Joined: Jan 2015

Posts: 1

From: tacoma, wa

alternator putting out 18 volts?

Hi guys.. ive got a 2002 protege5 and the alternator went out.. we have put 4 different new ones in it and they are all putting out 18 volts.. we can not figure out whats going on.. any ideas / suggestions? Thanks!

01-19-2015 | 09:31 PM

hixx

Senior Member

Joined: Aug 2007

Posts: 1,324

The voltage regulator is in the PCM. It does not actually have an alternator. It is a generator controlled by the PCM. Check the wiring from it to the PCM but it will likely need a PCM.