mines a 70 without a cowl induction only a cowl hood 402 BB. it had a 4 speed but i put a turbo 400 in it. so i bought the kickdown switch for the tranny, which also activates the cowl opener. i'm wonder if i need the relay to kick down tranny or if its for the cowl induction opener? thanks steel
yes the switch by gas pedal i have i'm talking about the one that mounts on firewall for the cowl induction hood. they are tied into one another but if you dont have a cowl induction hood i dont know if you need or not.
The switch above the accelerator is what you might consider the “trigger”. The lead coming off the switch that has continuity when the pedal is all the way down is what triggers the relay to close sending current to the kick down switch. If the relay is supposed to be used it would be because the switch above the accelerator could not handle the amount of current that it took to actuate the kick down. I can send you a wiring diagram of how to wire-5 pin relay if you think you might want to use it.
i also have th400 bb but no passing gear. you can still get nos switches from year one.(1242101) also there's a wire harness that goes from the switch out the firewall (# 17565) which i got from www.wiringharness.com. but i don't know where to connect that end of the harness. also my gas pedal doesn't seem to hit the switch when i mash it. nothing looks out of order there. maybe it's not supposed to. well hope the part #s helped and if you figure it out please let me know. thanks
GM didn't use a relay on the TH400 kick down circuit. If you have the cowl hood and a TH400 a single switch is used for both. Here's a diagram that shows how the kick down and the cowl hood are wired to the factory kick down switch. This is a pic of the M&H cowl hood harness. You can see the switch connections and the kick down wire connections.
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