Voltage fluctuating/dash lights flickering--help
Thread Starter
Instructor
Joined: Jul 2003
Posts: 118
Likes: 0
From: Woodbine MD
Voltage fluctuating/dash lights flickering--help
'92 LT-1
All dash lights are flickering and voltage on LCD is jumping between
around 15 to 13.5 volts. Battery/Alternator? What should I check and
how?
Thanks folks!
trvette
All dash lights are flickering and voltage on LCD is jumping between
around 15 to 13.5 volts. Battery/Alternator? What should I check and
how?
Thanks folks!
trvette
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
You have a voltage regulator in the alternator that is oscillating. Proof, unplug the connector on the alternator while the engine is running, if the flickering stops, it is the voltage regulator. If you want to take the alternator apart, you can replace the voltage regulator, or even easier, buy another alternator.
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
i was fighting this problem....
alternator voltages would jump up to almost 18...
replaced the regulator (twice), did not fix it.
Took the alternator to autozone to test; it showed voltages anywhere from 2v, basically no charge, up to 18v...
still haven't figured that out, but I no longer care, as my new alternator works perfectly...
in the mean time, my old alternator killed th epower supply in my dash cluster, twice....
alternator voltages would jump up to almost 18...
replaced the regulator (twice), did not fix it.
Took the alternator to autozone to test; it showed voltages anywhere from 2v, basically no charge, up to 18v...
still haven't figured that out, but I no longer care, as my new alternator works perfectly...
in the mean time, my old alternator killed th epower supply in my dash cluster, twice....
