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Re: Ignition switch failures.
Motors can sometimes turn into generators. I worked on a car that would run for 4-5 seconds after the ignition was turned off. The fix was to install a diode between the trans cooler fan and an ignition voltage source. In this specific case, we were powering the fan from an aux fuse panel fed by the main fuse panel ignition bus.
I also had a similar problem with an alternator, where I had to use a diode in series with the exciter wire.
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Mike
1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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