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. |
dr914@autoatlanta.com |
May 30 2020, 02:12 PM
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#2
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914 Guru Group: Members Posts: 7,832 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
pull the regulator and make sure that the light goes out. If it does plug in a new voltage regulator (probably not that) so if the belt is tight the alternator has a problem
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. |
914Toy |
May 30 2020, 03:38 PM
Post
#3
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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 |
pull the regulator and make sure that the light goes out. If it does plug in a new voltage regulator (probably not that) so if the belt is tight the alternator has a problem 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. Thanks for your comments. I have a hatch in the firewall, so will be removing the alternator for replacing the built in voltage regulator. |
73-914 |
May 30 2020, 05:11 PM
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#4
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Senior Member Group: Members Posts: 573 Joined: 24-April 10 From: Albany UpstateNY Member No.: 11,651 Region Association: None |
pull the regulator and make sure that the light goes out. If it does plug in a new voltage regulator (probably not that) so if the belt is tight the alternator has a problem 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. Thanks for your comments. I have a hatch in the firewall, so will be removing the alternator for replacing the built in voltage regulator. the voltage regulator is on the relay board not on the alternator |
ndfrigi |
May 30 2020, 05:22 PM
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#5
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Advanced Member Group: Members Posts: 2,928 Joined: 21-August 11 From: Orange County Member No.: 13,474 Region Association: Southern California |
pull the regulator and make sure that the light goes out. If it does plug in a new voltage regulator (probably not that) so if the belt is tight the alternator has a problem 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. Thanks for your comments. I have a hatch in the firewall, so will be removing the alternator for replacing the built in voltage regulator. the voltage regulator is on the relay board not on the alternator Keith’s car is a 6 conversion |
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