Quote:
Originally Posted by DrDave
Good evening:
You can't like any of that. It sounds like the front engine system is the closest to normal. I would adjust the front regulator to 28.4V. Once it's set there let's see how it handles the load. We also want to see a steady amp meter. If the amp meter is waving at you there is a problem in the field circuit. Let me know what you get and we will diagnose.
One step at a time will win the battle.
Report your findings.
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Rear alt field circuit to case= 15 ohms. Book value 10-12 ohms. Good diode test on real alternator.. Haven’t check front yet. Forgot about AC volt test, again.
Ran engines separately and adjusted both VR to 28.0v
Running both engines together showed 27.9-28.1v fairly steady, even with a load of full lights. Annunciators appeared to operate normally....but...rear alt out light would blink occasionally. Looking closely at warning board, we determined terminals 1&2 and 6&7 were wired backwards, with terminal 2&6 to cathodes instead of 1&7. Fixed that, re-ran front engine and it shows 30v. Gave up and came home to some 12 year old Glenfiddich and read old Tom Carr posts in the CPA forum.
I think I need to start over, but none of the troubleshooting guides in the service manual match these symptoms.
09-10-20, 11:50 PM
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