Use a Voltmeter Re: <VV> lights brighten sporadically
FrankCB at aol.com
FrankCB at aol.com
Mon Dec 31 16:54:47 EST 2007
Attach a cigarette lighter adapter plug to a voltmeter and plug it into
the cigarette lighter socket. Now you can tell if the occasional brightening
of the lights is due to a higher than normal voltage on the electrical
system. Normal should be about 14.0 to 14.5 volts after the engine is warmed up
and perhaps a 1/2 volt higher on a cold engine/alternator/regulator. If the
regulator is periodically malfunctioning (sticking points) the voltage can
increase by a full volt or even more which will tend to burn out the light bulbs
if it lasts very long. If that's the problem, then getting a solid state
(transistorized) regulator like all modern cars have will solve it.
Let us know what you find.
Frank "measure before replacing" Burkhard
In a message dated 12/30/2007 8:34:19 PM Eastern Standard Time,
kovacsmj at sbcglobal.net writes:
Standard Corvair has alt and volt reg separate. First check the tightness of
the belt. Under a heavy electrical load, and a loose belt, the belt may slip
around the alternator, too tight a belt will burn bearings out. The alt is
easy to replace, but the three isolating screws are a royal pain in the
@#%@#$. You really gotta get the maint book, its all in there.
Ray Rodriguez <reray at echoes.net> wrote: The lights (headlights, dash
lights etc.) on my 65 Monza sporadically get drastically brighter, then go back
to normal or slightly below normal brightness. This seems most common when the
car is cold and the brightness sometimes is affected by RPM and sometimes is
not. I suspect the voltage regulator is the culprit (I dont think a bad
ground would give me extra bright lights, only dim lights). What are your
opinions, and how do I fix it? Is the voltage regulator in the alternator or
Thanks in advance!
Ray Rodriguez III
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