Inspect the driveshaft, look for dents, undercoating or buildup, or driveshaft or companion flange out of balance, check for missing weights on shaft. Try removing driveshaft and reinstalling 180 degrees different.
what are the symptoms of a bad temperature switch
The Buick Roadmaster was not produced in 1986. They were made from 1991 to 1996.
It is not equipped with an inertia switch.
You either have the lockout on or you have a defective master switch.
Either the neutral lockout switch, an electrical connection or the keyswitch. If it's a stickshift it could be the clutch pedal lockout switch.
Its in the key switch
Vehicle won't start - jumps the terminals on switch and vehicle starts
A 1992 Buick does not have an inertia or fuel cut off switch.
Possibly a neutral lockout switch, possibly a bad connection, possibly an ignition switch.
If equipped, the lock out switch is on the driver's door.
Low freon
it is a switch,current goes through when switch is on and the current doesn't go through when its off you're welcome