Check the battery to body ground. after that you will need electrical diagrams to check power and grounds at the light switch and turn signal switch.
SOURCE: fusebox diagram for 1989 buick park avenue
hi try Buick car owners club or an auto electrician that specializes in Buick is guaranteed to have a copy hope this helps glenn.......
SOURCE: 2000 Buick Park Avenue Service engine soon light
need to take car somewhere to have the code read with a scanner,try parts stores first some will do it for free if not the dealers have them
SOURCE: How do I bypass 1992-94 buick park avenue security system?
On mine I bypassed it with this solution after it was locked down for weeks: http://newrockies.ca/vatsbypass . This one will bypass the entire system and not only the key and lock cylinder. I wanted to kick the whole system out of my car and never hear about it anymore.
SOURCE: The courtesy lights on my 1992 Buick Park Avenue
Hello! You may need a multimeter to perform a few test procedures but we will do the simple testing first...See diagram below of the Relay Box which is under the right side of the Instrument Panel...The Right column, as well as the left, has five relay slots...The bottom relay in the right column is the Interior Lights Relay (aka fog light relay)...#1 suspect is this Relay...Rather then buying one (they are inexpensive anyway) switch it with the Horn relay...Horn relay is in right column, second one from top...See if courtesy lights work...If so replace Relay...See second diagram below...
If this does not solve the problem: The #2 suspect is the Light Switch...#3 is wiring and we will address these two after the Relay is eliminated...
Guru....Saailer
STANDARD MOTOR PRODUCTS Part # RY116...Cost #7
I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867
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