Question about 1999 Mercury Cougar

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Alternators not charging changed alternator and battery checked main power wire its good where does the small red and green wire go to off the voltage regulator

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I had the same problem there is a inline fuse on the red wire that comes off the battery the wire goes to the starter then to the alternater after the starter there is a black bow on the red wire run your hand down it you will find it its at the back of the moter it have 175 amp fuse unbolt it go to auto zone and they have them

Posted on Dec 24, 2012

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Lights pulsing...battery light barely lit. after you start the car don't push the gas...put a meter on the battery...have a friend rev the engine to 2500 to 3000 alternator kick in and even when idled to normal 6-700 range voltage will stay aroun 14.5 going to try this fix first anybody hear about a higher output alternator fixing the problem?

Posted on Oct 20, 2011

  • Damon Danner
    Damon Danner Dec 26, 2012

    Well...ended up replacing alternator anyway...what a job..left the same hookup and it seemed to be fine....then the wife blew the head gasket.


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The red wire is the power, the grren wire is your signal wire. the green wire sends the signal from the regulator to the ecm to tell it when to cycle the alternator on and off. you could have a faultyy regulator or signal wire causing the malfunction. the wires join the main harness after the regulator.

Posted on Apr 05, 2011

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  • Damon Danner
    Damon Danner Jul 21, 2012

    I ran a hot wire from the battery to the voltage sense wire on the alternator (green) all problems cleared up...did end up changing an alternator, but all problems gone...sensitive little car, but I like it.

  • Damon Danner
    Damon Danner Jul 21, 2012

    saw a service bulletin about this somewhere...they wanted you to go into the fuse box and go through there, but I just shade treed it and ran it off the hot sid e the battery.

  • Damon Danner
    Damon Danner Jul 21, 2012 yes, this was the original post...just did my own version.


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