 Voltmeter reading? Accuracy? |
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| Spoke |
 Feb 2 2026, 09:06 AM
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#41
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Jerry  Group: Members Posts: 7,337 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None 
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QUOTE(SKL1 @ Feb 1 2026, 10:20 PM)  Spoke- light was loose in socket- fixed that light works fine. Will try that temporary wiring trick you suggest- and as stated, I won't let it run long that way! Excellent. Without the GEN bulb most likely the alternator will not start. Does the GEN light go out when the engine starts? If so, this means the alternator is working to some degree. By shorting DF to D+ the alternator is outputting maximum power. This is a good test for the alternator. Make a short pigtail with 2 quick disconnect female spades to do the jumping. |
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| pbanders |
Feb 4 2026, 11:22 AM
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#42
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Senior Member Group: Members Posts: 973 Joined: 11-June 03 From: Scottsdale, AZ Member No.: 805 Region Association: Southwest Region |
QUOTE(SKL1 @ Jan 5 2026, 08:52 PM) Voltmeter reads around 11V and drops to 10 if I turn on the headlights. Immediately goes back to 11 or just over that with the lights turned off. FWIW, I've found that voltage drops and alternator loading, especially at idle, can be a problem in the 914. Things I've done to improve the situation: 1. Replace all lights (except for the gauge lights) with LED's. 2. Add an additional heavy (8 ga) wire from the alternator body to chassis ground. 3. Check the condition of your battery ground strap. The OEM braided one fell apart when I removed it! 4. Clean all ground points and use dielectric grease when re-installing. Use a DMM and check for ground voltage drops throughout the wiring system. |
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| SKL1 |
Feb 7 2026, 03:52 PM
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#43
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Senior Member Group: Members Posts: 1,757 Joined: 19-February 11 From: north Scottsdale Member No.: 12,732 Region Association: Upper MidWest
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Was just getting ready to do the "test" today jumping the wires (after my son helped his colourblind father confirm the wires) and wanted to confirm:
I have removed the voltage regulator and then jump the two wires with the regulator removed? Don't want to fry something!! TIA. (can you tell I very much dislike electrical stuff? Would much rather rebuild an engine!!) |
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| Spoke |
Feb 8 2026, 09:55 AM
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#44
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Jerry Group: Members Posts: 7,337 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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QUOTE(SKL1 @ Feb 7 2026, 04:52 PM) Was just getting ready to do the "test" today jumping the wires (after my son helped his colourblind father confirm the wires) and wanted to confirm: I have removed the voltage regulator and then jump the two wires with the regulator removed? Don't want to fry something!! TIA. (can you tell I very much dislike electrical stuff? Would much rather rebuild an engine!!) Yes. Jump DF to D+ and basically put the alternator into maximum output. Won't hurt anything. Measure the battery voltage and D+/DF voltage to chassis. Both should track each other and be around 17V. |
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