94 lesabre alternator

[Chumbucket]

Just changed alternator on car cause light was blinking on and off ,now about a week later same thing with this alternator (Remy Brand) this one read's up around 14-15 Volt's when just starting . Old one kinda stayed around 13. Any idea's what to check or try another alternator?? Thank's

[Bassasasin]

Could be a battery or connection... The old one may still have been bad. Alternators have cycles that are added together with diodes and when one phase goes out the voltage is a bit reduced.
Im thinking 13.8 is a good alternator.
A high current at just starting is somewhat OK because the battery has been discharged with the start process.

Batteries however have had their own wierd problems. Such as intermittent connections internally.

Alternator, battery, starter I consider are a combined set.. If you have a weak battery you can ruin your starter. If you have a bad alternator you dont charge your battery well and make it weak and ruin your starter.

Try cleaning up the terminals till shiney. Or have it done or at least checked.
If you have a battery charger put it on and charge up the battery. If you know what your looking for maybe during that process you may see a drain on the charger that seems to go on too long or too short and indicating the battery is in need of replacement.

Good Luck

[padriver]

My 2 cents:

Everything's fine, except the voltage light itself.

Mine also comes on and off while driving, but I have no charging or battery problems whatsoever. And since I have the car (94 PA), I changed the battery, alternator and the PCM, but the behavior of the voltage light always stayed the same.

So I figure my problem lies in the instrument cluster or the wiring. If your light also comes and goes with road vibrations or by jiggling the shift lever, then I guess you have the exact same problem.