Overdrive Issues (again)

[jackson]

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Originally Posted by 40cpe

If, in fact, your OD is wired like that you might want to consult a wiring diagram. The grounding points in the solenoid are passed through the kickdown switch and connected to the coil. This is a ground to momentarily kill the ignition so the OD can drop out. Power for the relay is from the battery and the voltage to activate the relay is from the ignition switch.

I'm using the wiring diagram from VanPelt, which matches the diagram in my 1950-'51 Shop manual. I have a #10 wire from the Ign terminal on the relay (fuse) to the bat. side of the coil. Another wire goes from the distributor side of the coil to one of the lower terminals on the kick-down switch. There is no wire directly from the battery (or starter solenoid) to the Ign terminal like on Randy Rundle's diagram. I am, however using the relay I bought from Rundle, which is just like the ones VanPelt sells.... but VanPelt says to not use that top-left terminal. Their diagram says "not used on Ford/Merc.