If your car was originally an automatic and had a TH400, the harness will have the requisite two leads in the bundle that routes along the left side of the intake. These can be used with a stock or aftermarket switch, or you can patch in your own wiring using a 12v ignition source to switch to trans solenoid.
Glad somebody finally went there with that info. This thread was just blasting along at full speed without that and I figured "forget it". The power wire should be green and the signal wire down to the tranny - black.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
