I have a relatively strange question. My parents own an early 90's F250. My father has Parkinson's and is insisting on still driving. My mother has asked me to disable the vehicle so that he can't start it. The obvious to me would be to disconnect the battery, but that won't work because it's the one thing he always checks. I have pulled all of the fuses I could find below the steering column and none of them disabled the ignition. I would greatly appreciate it if someone could suggest a way that I can keep the truck from starting, but that can be fixed in just a couple of minutes without tools. It can be something simple, just can't leave wires obviously hanging down or disconnected or anything like that. Thanks.

 

you could always take disconnect the inertia switch or wire up a fuel pump disconnect switch under the dash or seat. or put a battery dissconnect under the seat or dash

 

the ignition fuse is usually under the hood and not my the steering column but you could also disconnect the the starter or pull the center plug wire on the distributor

 

or put a switch on the dash to turn the power to the coil on and off

 

There is already a switch under the dash that will disable the truck, it's called the inertia switch. Pull up on it and the fuel pumps don't get power. It's up under the dash. It's above and to the left of the brake pedal. There are two wires going to it coming from the main wiring bundle.

 

yeah what andy said lol i said it but he put it in simpler terms so i am going to go with his post

 

sorry about your dad and the situation you are in.

will he try to find the inertia switch?

if he will maybe you need to be more aggressive.

disconnect the battery and put a chain/lock on the hood.

i had to take my fathers ability to drive away a few years before he passed away.

it was not an easy thing to do.

good luck.

 

Would he notice the fuel pump relay missing? If not that's a quick and easy go/no go part. If you need to be a little more devious you could have a relay you swap it for that has one or more of the legs removed.

 

removing and changing the key cylinder would also do it.

will he get real angry?

does he realize the danger of him driving?

 

My friends grandfather has dementia and has the same situation. they took his truck down to a shop where they install remote locks and alarms and stuff like that and they wired it up so you couldn't start the truck without pushing the OD button off. So far it works great for him he only thinks there's something wrong with it. this was on a Toyota Tacoma, but i don't think it would be any different in a f-250.