Alternator light on? |
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Alternator light on? |
914Toy |
May 30 2020, 01:19 PM
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#1
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Senior Member Group: Members Posts: 717 Joined: 12-November 17 From: Laguna beach Member No.: 21,596 Region Association: Southern California |
My alternator light comes on with ignition on, and stays on with engine running, and voltage stays at 12V regardless of rpm's. Was charging regularly at nearly 14V. The fan belt is in good order at spec tension. The alternator was reconditioned a couple of years ago and now has about 5,000 miles on it. The diode behind the gauge was also replaced, but I have had the gauge in and out a few times working on other issues - possibly damaging it(?)
Before removing the alternator for testing, could the diode behind the gauge be faulty preventing charging? If so, what is the spec of these diodes? Your suggestions will be welcome. |
Steve |
May 30 2020, 06:09 PM
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#2
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914 Guru Group: Members Posts: 5,570 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California |
It's a 2.7 six. The alternator has a built in regulator. He is using a standard alternator light, not an LED.
Reading the manual... One side of the light goes to D+ on the regulator (blue wire) and the other side of the light goes to ignition + (RD/BK wire). If the light is on, it's getting power. Slight chance the blue wire is grounding, which will also enable the light. Can you get to the blue wire directly on the alternator and put a light on it and see if it makes a difference? Otherwise your going to have to pull the alternator again and get it tested. |
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