| Alternator Anomaly [message #351052] |
Sun, 29 December 2019 18:04  |
Stu Rasmussen
Messages: 130
Registered: January 2019
Location: Silverton, OR
Karma:
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When I purchased the Birchaven the PO replaced the alternator as part of the deal.
I have a persistent 0.3 ampere drain (regardless of whether the ignition switch is on or off) on the engine battery which goes away when I disconnect the 'sense' connector from the alternator.
The new alternator is an AutoZone DL7157 which according to the specifications is an internally regulated unit.
I suspect the new alternator is defective as that 'sense' terminal should only be a floating reference for the alternator's internal regulator.
Also, the alternator voltage is about 15.5 volts when the engine is running, even into a fully charged battery. I suspect the alternator is running wide open and will eventually cook my batteries if I leave this go too long.
I'm looking for confirmation of my diagnosis before pulling the alternator and trying for a 'lifetime warranty' replacement.
Any other thoughts?
Thanks in advance
Stu
Stu Rasmussen W7QJ
Silverton, OR
'77 Birchaven
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