why must you depress brake pedal on a 1990 thunderbird for it to start

Asked by Aug 28, 2016 at 02:45 PM about the 1990 Ford Thunderbird LX

Question type: General

cant find what connections are made to allow the car to start by pressing the
brake switch i know it must be or will not start

4 Answers


I would assume the tranny is auto, it is probably to prevent the motor firing and driving off uncontrollably down the highway, I have known this to happen when people are doing maintenance and they start up outside the automobile and its either in gear or in drive and the cars picks up and drives off uncontrollably down the road

1 of 1 people found this helpful.

Safety interlock.

2 of 2 people found this helpful.

It IS a safety feature, see post #21 at the link....http://forums.tccoa.com/6-general-tech/27461-pressing-brake- start-car.html

1 of 1 people found this helpful.

Well Bob, I stand reproved! You are 100% correct! On page 14 of the 1990 Thunderbird owner's manual it states for automatic transmission "The starter will operate only if the brake pedal is pushed down." So I apologize for giving out wrong information!! HTH. -Jim

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