Cadillac Repair: 1985 cadillac will not start all the time, safety switch, brake booster

Question
Starter will not turn over with the key it's a 1985
deville cadillac

Answer
most likely the NEUTRAL STARTER SAFETY SWITCH on top of the transmission below the brake booster is faulty.

Try starting it in NEUTRAL.

Do you have an anti-theft system on the car as this could be your problem.

Do you have any computer codes ?.