Alternator/Voltage Regulator issue, Alternator light is on until rpm's increase |
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Alternator/Voltage Regulator issue, Alternator light is on until rpm's increase |
PDXMike |
Jul 26 2019, 09:41 AM
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#1
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Slowly Learning Group: Members Posts: 111 Joined: 20-December 10 From: Portland, OR Member No.: 12,501 Region Association: Pacific Northwest |
My alternator light stays on after I start the car. It was dim, and it would go off (and stay off) as soon as I got the RPMs up over 1000 or so. I did eventually find a faulty connection between the battery and the Voltage Regulator, which I thought would solve my problem. Instead, I now have a similar condition except that the charge light is on full bright (not just dim, like before) until I blip the rev's up a bit. It will still go off and then stay off for the rest of the time the car is running.
With the car running at about 1000rpm I am getting 14V at the battery. Pulling the VR and shorting D+ to Df results in 16-17V at the battery, so I am assuming my alternator is good. I thought there was something going on with the VR not applying enough voltage to the field at start-up, so I ordered a replacement. They new Voltage Regulator is an AC/Delco part, not the OEM. I have exactly the same issue with the new Voltage Regulator. Any ideas? Thanks! Mike |
Chi-town |
Jul 26 2019, 03:52 PM
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#2
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Senior Member Group: Members Posts: 851 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
Usually most alternators won't excite till 700-900rpm
A normal cold start high idle would take care of that but a hot restart may take a blip of the throttle to get it done. |
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