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80 gl dash lights
Posted 02 August 2012 - 02:17 PM
(which i have since fixed).
what i would like to know is where is a likely place to look for the problem. i have checked, my alternator is working fine, so are my brake lights, it has a new battery and battery clamps, and running with no loads it sits at 14 volts steady
Posted 04 August 2012 - 12:16 AM
Posted 04 August 2012 - 10:25 AM
Get a new alternator.
Yours has a bad diode.
i think your right i took a multi meter and turned it to ac volts and i am getting 45 ac volts at the battery. next stop new used alternator.
Posted 04 August 2012 - 10:29 AM
if i blew a power the lights wouldn't turn on at all. i was thinking more along the lines of a shorted out ground somewhere, at least for the park break light. i am not sure how the stop lamp lights work and what could cause them to malfunction. i am going to replace my alternator and see if that changes anything
Sounds like the blew a power or ground to the cluster. You'll need schematics an d patience to get it out for testing.
Posted 06 August 2012 - 09:35 AM
You should have less than .1 volt of AC voltage across the battery when the alternator is running and in good shape. Your alternator clearly is defective with 45 volts of AC. You may have to replace your battery also. Have it tested before you put in the new alternator to make sure it is ok. When you replace the alternator and if you find the warning lights are still on then I suspect you will need to replace the external voltage regulator also. There may be a bad blocking diode in it and it is allowing power to flow back to the warning lights and turn them on.
The warning lights are in the field circuit of the alternator so they can be in the test mode when you turn on the ignition and the engine isn't running. That allows current from the ignition switch to pass through the lights and to ground through the alternator field windings. When the alternator is running, the field is built up and back feeds power to the lamps. The lamp circuit now has no ground connection and the lights turn off until there is a problem with either the alternator or in the area the warning light is for.
Edited by Cougar, 06 August 2012 - 09:43 AM.
Posted 06 August 2012 - 10:11 AM
Posted 28 November 2012 - 12:07 PM
Posted 28 November 2012 - 01:19 PM
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