Bill, the stock microswitch should come with a thin jam-nut to lock the switch position, once you decide on it. The clearances involved almost require taking a cheap open-end wrench (poor strength so it's easier to grind) and grinding its sides down to fit in the space available. Then throw the modified wrench in the glove box for possible readjustment when things heat up while driving. Once you get the hot adjustment right & the jam nut sufficiently tight, no further antics will be involved. The necessary wires are part of the rear wiring loom for the tail/stoplights/AC fan.
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