Question about 1988 Chevrolet Suburban
Voltmeter shows alternator putting out a charge when vehicle is idling. The voltmeter will continue to show and increase in voltage. once the voltmeter shows a significant charge, I can begin driving and turn on all electrical devices, heater fan, lights, radio, back window, etc. However, as soon as I brake or let my rpms drop off, the voltmeter shows that I am draining the battery. If I stop, let it idle, it will build back up and I can go again with everyting on.
it sounds like you have a bad diode in the alternator
and since the voltage regulator is internal you will have to replace it or take it out to get tested
Posted on Mar 09, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 24, 2015 | 1994 Chevrolet Suburban
Oct 08, 2014 | 1992 Chevrolet Suburban
Aug 11, 2014 | Cars & Trucks
Jan 20, 2014 | 1999 Chevrolet Cavalier
Jan 17, 2013 | Chevrolet Suburban 1500 Cars & Trucks
Oct 09, 2010 | 1995 GMC Suburban
Sep 25, 2009 | 2005 GMC Envoy
Apr 06, 2009 | 1988 Pontiac Grand Am
Jul 26, 2012 | 1988 Chevrolet Suburban
147 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: