Posted by Bob M on April 01, 2009 at 05:52:57 from (151.190.254.108):
In Reply to: charging post #3 posted by chad from michigan on March 31, 2009 at 18:10:19:
Chad - You should be able to isolate the problem by doing this:
1 – Provide a temporary ground wire from the regulator relay base plate (NOT the regulator mounting bracket) and the grounded battery terminal. Now run the engine at full RPM. If the ammeter shows a steady 15 amps or so immediately after startup your problem is a bad ground to the regulator.
2 – If the VR ground is good but the ammeter still shows no charge is erratic, jumper the generator F terminal to a good ground. Again run the engine at full RPM. If you see a STEADY 15 – 20 amp charge on the ammeter, the generator is fine but the VR is no good.
3 - If after doing #2 the charge rate is still low or 0, or the ammeter hand is flicking around erratically, leave the F terminal grounded and with the engine running at full RPM, temporarily jumper the BAT and ARM terminal at the regulator (use at least a jumper #10 wire and expect a spark…). If you now get a steady 15 – 20 amp charge it’s time for a new VR. However the ammeter still shows low or no charge, or if the hand is moving all over the problem’s the generator. (Important! Do not leave the BAT and ARM terminals jumpered with the engine idling or shut down!)
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VR's CAN be adjusted. However it’s a fussy procedure and requires special tools and instruments to accomplish. And if you get it wrong you can easily destroy your battery. You’ll be money ahead to buy a good (American made) VR rather than trying to adjust your old one.
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