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Old 10-06-2011, 08:21 PM   #1
69 GMC forever
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Question who has a diagram for TH400

I am looking for a simple wiring diagram for my TH 400 so I can wire it up to get kick down to work ... any help would be great thanks gang
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Old 10-06-2011, 09:29 PM   #2
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Re: who has a diagram for TH400

sorry I don't have an answer for you. In fact I am about to have the same issue Consider me subscribed.
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Old 10-07-2011, 05:29 AM   #3
JimKshortstep4x4
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Re: who has a diagram for TH400

Here is a picture of the stock kickdown switch. There are two wires connected to the switch, one is power the other goes to the detent solenoid on the TH 400.

Jim
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1965 Impala SS 400 sbc, Muncie rock crusher
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1971 Snowplow built on a Blazer frame
1972 GMC Short bed, stepside, TH 400, 427 BBC
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Old 10-07-2011, 10:31 AM   #4
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Re: who has a diagram for TH400

ok thanks Jim just what I wanted to know
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Old 10-07-2011, 04:07 PM   #5
MARKDTN
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Re: who has a diagram for TH400

Pink Ignition switched power to a switch. Switch normally open. Switch closes at wide open throttle. Sends power through an orange wire to the male terminal on side of TH400. I have seen the switches on the pedal inside, not sure which have it like the photo above and which are on the pedal.
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Old 10-07-2011, 07:49 PM   #6
JimKshortstep4x4
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Re: who has a diagram for TH400

71-72 have the kickdown switch on the gas pedal, 70 and older have the switch on the carburetor.

Jim
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1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end
1965 Impala SS 400 sbc, Muncie rock crusher
1966 Impala SS 396 bbc, TH 400
1969 El Camino, 350 sbc, TH 350
1971 Snowplow built on a Blazer frame
1972 GMC Short bed, stepside, TH 400, 427 BBC
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