pybyr
Full Access Member
Lately I have been getting erratic readings on the OEM dash voltmeter on my 89 bricknose.
I'd been hoping it was the gauge being flaky, but several times after the truck has sat for several days, I have had batteries that faded into nothing and failed to start the engine.
Last week I ran the engine to 2000 RPM and measured 14.2 volts at the batteries- perfect. At that time the dash gauge was reading where I'd expect.
A few days later the gauge was reading low again, followed by a day of sitting followed by RUH Ruh ruh uh.
Last January I had alternator troubles and replaced the Alternator (Leece-Neville 160 amp)'s onboard regulator and internal diode trios [the diode trios had failed); I also checked all the windings with an ohmmeter, brushes looked great, cleaned and shined slip rings.
Batteries were supposedly new soon before I bought the truck, which was two years ago. Both were new, both replaced at the same time.
Any suggestions of what to check to figure out what is going on?
Thanks!
I'd been hoping it was the gauge being flaky, but several times after the truck has sat for several days, I have had batteries that faded into nothing and failed to start the engine.
Last week I ran the engine to 2000 RPM and measured 14.2 volts at the batteries- perfect. At that time the dash gauge was reading where I'd expect.
A few days later the gauge was reading low again, followed by a day of sitting followed by RUH Ruh ruh uh.
Last January I had alternator troubles and replaced the Alternator (Leece-Neville 160 amp)'s onboard regulator and internal diode trios [the diode trios had failed); I also checked all the windings with an ohmmeter, brushes looked great, cleaned and shined slip rings.
Batteries were supposedly new soon before I bought the truck, which was two years ago. Both were new, both replaced at the same time.
Any suggestions of what to check to figure out what is going on?
Thanks!