Jeff
1st, I would disconnect the battery cables, fully charge the battery
then let it set to see if the voltage drops below 12v. If the battery is OK
hook up the ground cable then touch the positive cable to the + terminal if
you get a big spark there is something very wrong.
If a diode goes bad in an alternator it can drain the battery but
since the alternator is the drain it will feel warm to the touch. Check
the alternator, starter relay and starter motor to see if one of them is
getting warm or hot to the touch.
The voltage regulator should regulate the voltage from the
alternator @ 13 to 15V anything less than 12v is probably a bad regulator.
I would check this with a meter at the battery.
Ron Fraser
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of Jeff Holt
Sent: Tuesday, October 25, 2011 8:22 PM
To: tigers@autox.team.net
Subject: [Tigers] Voltage regulator?
The battery goes dead after a few trips around the block. I just had the
alternator bench tested and the technician says its almost new "out of the
box" as he says it.
He said voltage regulator, most likely. I'll pull that and have it checked
but, any other culprits? The battery charges full over night.
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