1991 Ford Taurus Q&A
1991 Ford Taurus Question: gear position sensor
The only way to check this is with a voltmeter or diagnostic scan tool. You will needs the proper reference voltages to compare them to and that info is not always easy to find. According to the materials I have access to the light blue wire with yellow stripe should have 0 volts in park and 5 volts in drive. I will tell you, those sensors can be out of adjustment, so you might need to visit a shop that has the proper tools to check that and usually if the sensor is bad it will turn the check engine light on. Good luck. - irvtech
Tech says to replace the "switch". I couldn't locate a part called backup light switch on the Ford parts site. Am I looking for the wrong part or is the part listed as something else?
In the morning the car starts right up, run normal very smooth acceleration, even full throttle, full range of RPM's. Shift points are good and strong and at the right time. BUT when the temp. com...
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DROVE IT FOR AWHILE STILL HAVE SAME PROBLEM