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Old Sep 24, 2005 | 09:12 AM
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Kill Switch

Is it possible to install a kill switch on a 1990 F150? How would I go about doing it?
 
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Old Sep 24, 2005 | 03:45 PM
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Do you want it to crank and not start? Or not crank either?

If you want it not to crank, then you can interrupt the red/lightblue wire. You will find this wire out at the starter relay on the passenger side fender, and you will also find it on the clutch pedal if you have a manual tranny, or on the driver's side part of the tranny for an automatic.

If you want it to crank but not start, you can interrupt the tan/lightgreen wire going to the fuel pump relay. You should have a bank of relays under the hood, and one of them is the fuel pump relay. The computer uses the tan/lightgreen to fire up the fuel pump.
 
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