Now I’m overcharging, My car is murdering voltage regulators |
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Now I’m overcharging, My car is murdering voltage regulators |
VaccaRabite |
Sep 18 2018, 12:05 PM
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#1
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En Garde! Group: Admin Posts: 13,446 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
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I’ve been driving my car all over for the past week or so. Last weekend I noted that it was hard to start, and it stalled while pulling away in 1st once. Weird. Didn’t worry about it and finished my drive. Got home and I checked voltage at the battery and I was making 18 volts, my VR had seemed to fail and I was pushing max voltage at the battery. Geeze, no wonder the car was hard to start with the alternator at max effort. So, I’ve done the ground thing and they are all clean and good. In my undercharging thread I ran a 10ga wire from the alternator case to the body ground point near the relay board in the engine bay. I’ve also checked all my collection of voltage regulators and all 5 of them, be they mechanical or solid state are now allowing the alternator to go full bore all the time. This is with both the brand new battery and the PC680 gell cell race battery. What do I look for now? Could I have broken the VRs by pulling them off the running car while chasing issues with the alternator last time? Or is this a car thing and I need to fix something else. The car is essentially acting like I have D+ and DF jumped with D- left empty. Zach |
Spoke |
Sep 18 2018, 12:09 PM
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#2
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Jerry Group: Members Posts: 6,984 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Did you find a 666 tattooed somewhere on your car?
If you pull the VR (with the engine off), does the alternator quit charging? |
VaccaRabite |
Sep 18 2018, 01:10 PM
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#3
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En Garde! Group: Admin Posts: 13,446 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
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worn |
Sep 19 2018, 06:55 PM
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#4
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can't remember Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
Did you find a 666 tattooed somewhere on your car? If you pull the VR (with the engine off), does the alternator quit charging? Yes. Pull the VR and the idle picks up and the battery quickly dips down to about 12.8 volts. Zach Which means you don’t have a Df to D+ short at any place outside the VR. One of the most frustrating problems I ever encountered was when a new ignition component was dead right out of the box. I usually assume they start out goog. I had a set of new points fail in only ten miles. Drives you nuts. You can double check this by plugging the VR directly into the harness from the alternator. If I recall right, the alternator harness plug that goes to the relay board is the same shape as the plug from relay board to VR. |
Spoke |
Sep 19 2018, 07:17 PM
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#5
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Jerry Group: Members Posts: 6,984 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
If I recall right, the alternator harness plug that goes to the relay board is the same shape as the plug from relay board to VR. Yes, the VR should plug into the alt connector. The only other connection needed is to D+ on the relay board to get the GEN light involved else the alternator may not bootstrap itself. |
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