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DIY & Home Improvement

Clearly fogged in

(2,050 posts)

1. Sometimes things aren't what they seem

Reply to bucolic_frolic (Original post)

Sun Sep 27, 2020, 11:23 AM

Sep 2020

My first guess/suggestion would be the battery has an internal short - bring it up to float voltage, disconnect and hook up a small load like an instrument bulb. Recheck the voltage drop for a day. 11+ volts is one bad cell, less is more bad cells. The second would be a bad diode in the regulator (or alternator in the absence of an external regulator)

Too many times I've seen batteries load test good but fail in use.

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Automotive electrical question [View all] bucolic_frolic Sep 2020 OP

Sometimes things aren't what they seem Clearly fogged in Sep 2020 #1

Check your draw as you pull fuses one at a time. gibraltar72 Sep 2020 #2

Passed parasitic draw test bucolic_frolic Sep 2020 #3

Just to close this off, thanks for the help bucolic_frolic Sep 2020 #4