AboutRay Niemi Expertise ASE Master Rated. Ask any questions about Volvo models up to 2000. Runnability, starting and charging system, diagnostic codes, brakes, front end, where to get certain parts. Should I buy this Volvo or not? I will try to answer your question and give you the knowlege to make the best decision in your case.
Experience I started working on Volvo's in 1978 at the dealer and attended all the schools and achieved a Master rating. Since 1999 I have worked at independent shops and now own my own shop.
Organizations Alldata on line repair manuals. IATN network of techs.
ASE rating of Master.
Question I have an 86 Volvo 760 GLE 4cyl turbo automatic. There is apparantly a problem with the alternator/voltage regulator as when the engine is running and the positive battery terminal is disconnected and a load is placed on the electrical system such as the headlights on the engine dies. Replaced alternator/voltage reg with a used one on a spare wreck we have and it now runs with positive terminal disconnected as long as the headlights, ac fan and/or windshield wipers are not run at the same time. With the battery connected and running highway speed I have erratic engine when running electrical components. When running Headlights, AC fan and windshield wipers the wipers wont work. Pulling over, turning off the lights and ac fan for a minute fixes the issue. Whenever there is a load on the electrical system such as running lights the car runs rough, no acceleration. I dont know if its the alternator, voltage regulator or an excessive draw by the lights ect... I dont have the $$$ to go changing parts till I get it right. Your opinion is appreciated
Answer Noel,
I am not sure the way you tested the charging system is valid. Once the battery is low and you put a demand on the system it sounds like it fails. You will need the help of a tech to try testing and searching out the faults. Ok put a volt meter on the battery what it the reading? Start the car what is the reading? Turn on lights etc. what is the reading? Is there a part store in your area that can test an alt if you bring it to them?
