Clutch Interlock Switch (Theft)

HISSIN50 said:

yes it can be done, but remember that all the thief has to do is jump the starter solenoid to by pass your device.

the fuel cut off is a good idea. i hope Tom will have an opinion on this:
wire a fuel cut off like a starter kill relay, using a bosch SPDT relay. run the two halves of the wire you cut through terminals 87A and 30. put a hidden switch in that supplies ground and run the output to 85. wire constant power to 86. nothing to 87.

any time you are driving, the juice will flow through the NC terminals (87A and 30). i think this is the best way to do it, that is least likely to fail. simply using an inline switch sets you up to have the car die when the switch fails, since juice flows through it while driving.
the way i describe only has the relay energized only when someone tries to start the car. otherwise the relay is at rest.

i would love to hear from Tom what the chances are of a bosch relay failing with this configuration. it is the best way to do it that i can think of or know of. any better, more reliable relay to use than a Bosch SPDT 30 amper? (Tom, i have been meaning to run this by you for awhile, so if you dont mind, let me/us know what you think about the best relay to use and the whole idea).

for good measure, use a blocking diode to prevent feedback.

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