charging system 2003 explorer.
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charging system 2003 explorer.
2003 explorer 4.0
i have no charging from the alternator at all. battery dash light on all the time.
exciter wire from PCM to alternator, green/white is right around 11.6-11.9v when running. when key on engine off its 0.the other wire for the regulator is battery voltage all the time. voltage drop from large post to + battery terminal is 0.4v.
i tried 2 different new alternators so far from napa and same issue.
belt is not slipping and tension is good.
this vehicle sat for about 6 months and has been on the road for only a week or 2. maybe 100 miles so far until this.
any ideas? i might try a ford alternator if i cant get any other ideas of what to do.
i have no charging from the alternator at all. battery dash light on all the time.
exciter wire from PCM to alternator, green/white is right around 11.6-11.9v when running. when key on engine off its 0.the other wire for the regulator is battery voltage all the time. voltage drop from large post to + battery terminal is 0.4v.
i tried 2 different new alternators so far from napa and same issue.
belt is not slipping and tension is good.
this vehicle sat for about 6 months and has been on the road for only a week or 2. maybe 100 miles so far until this.
any ideas? i might try a ford alternator if i cant get any other ideas of what to do.
Thread Starter
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Senior User
Joined: Nov 2007
Posts: 138
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Sorry it's green/ red. Looks like I need a alternator with resistance from the 2 posts from the regulator to be between 750-1050 ohms. Most after markets so far napa and Bosch are over 10,000 ohms which the PCM cannot control. I will be picking up a ford alt on Monday.
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akvalentine977
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Jan 20, 2020 07:14 AM
