What fuse to pull to disable start?

[AJ_08]

Hello,

1987 Buick Grand National.

What's the easiest or more effective way to prevent the car from starting?
Pull any of the following Fuses: (ECM10 amp fuse, Fp/inj 15 amp fuse)? Disconnect orange wire at the battery that connect to the ECM?

Second, would any of the above not prevent the car from starting?

I was wondering if there's also a "crank" fuse.

Thanks for the help.

 

[AJ_08]

Hello,

1987 Buick Grand National.

What's the easiest or more effective way to prevent the car from starting?
Pull any of the following Fuses: (ECM10 amp fuse, Fp/inj 15 amp fuse)? Disconnect orange wire at the battery that connect to the ECM?

Second, would any of the above not prevent the car from starting?

I was wondering if there's also a "crank" fuse.

Thanks for the help.

And to add, pull the starter relay?

Don't have the car with me...

 

[salvageV6]

FP fuse is easiest, kills both the pump and the injectors and no need for the ECM to re-learn when re-powered.