tgates

I know this has been discussed before, but I need a final sanity check on my plan to mount a cutoff switch. The car is a 74 911, CIS. I have a Merit 6 pole switch. It contains a large normally closed terminal set, a small normally closed terminal set, and a small normally open terminal set. Here's the planned wiring:

1) Remove the wires running to the + side of the battery and mount to the large, normally closed terminal.
2) Run a battery cable for the other large, normally closed terminal to the + side of the battery.
3) Jumper one of the small normally open leads to the large (alternator side), larger terminal.
4) Connect the other small normally open terminal to ground via resistor.
5) Disconnect the CDS wire from the ignition switch and connect it to the other small normally closed terminal.
6) Connect the remaining small normally closed terminal to the ignition switch.

Thanks in advance for help

Terry

A930Rocket

I wish I knew how to install one, because I have one in my car I want to take out! Just not sure where all goes back to.

JackOlsen

I don't know if the following would work on a 74 911, but -- if it does -- it's probably a simpler solution than the one you outline.

Cut-off Switch Link

HansB

Sounds fine to me.

Not sure about the CDS wire, do not know the 911, but you should take the one that takes the power to the ignition lock.

tgates

Thanks to A930Rocket, Jack, and Hans.

The cutoff is for a SCCA/PCA race car thus I need the car to cutoff when the switch is off immediately. The simple ignition kill switch allows the car to run for a few seconds/minutes and is more of a theft deterrent solution.

Thanks,
Terry