When trying to start the engine and the starting motor will not turn over, do the lights dim? If so, there may be damage to the ring gear or the starting motor gear, or misalignment of the starting motor, causing these gears not to engage properly and jamming. If not, then you may have a wiring, fuse or relay problem.
SOURCE: Buick Regal dying
You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.
SOURCE: i have a 1999 buick regal ls dying.
I found the problem. It was the crank position sensor. There was also a cracked vacuum hose connecting to the diaphragm on the fuel rail. Replaced both and my 92 Buick no longer dies. For the guy who's Buick was dying when using the turn signals - replace the crank position sensor. One of my symptoms of my Buick dying was when I used my turn signals. Use of turn signals places a varying load on the electrical system which messes up the crank posistion sensor if it is going bad.
Bob
SOURCE: Low voltage, the battery runs low when running the car
What is the voltage you are reading? Is it below 13.2 or so? Also have you checked the current with the engine off to see if something else is working that should not be on. I ran across this twice while working on a truck and car. A relay that was wore out keep trying to close and would drain the battery every couple of months. Sometimes you can hear them clicking or buzzing. Touching them sometimes they are warm or real hot. But that is not a sure sign it is bad. In my Trailblaze they get hot but are ok. Another thougth is the belt on your alt, correctly set to spin it at the right voltage. I have ran across this many times lately with serpatine belts.
SOURCE: 2000 buick regal lse 3.8 wont start or turn over
several things to check out:
get it started and go have the battery, alternator, and voltage regulator tested. No charge at most parts stores.
IF they all test ok then you will need to remove the starter and have it tested. The solenoid could be bad. Was it wet outside the day it wouldnt start? if so then oisture is probably getting into the solenoid.
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