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Topic: Looking for THM 400 kickdown wiring diagram.

in Forum: C3 Driveline Components

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Looking for THM 400 kickdown wiring diagram.

Posted: 5/15/13 6:22pm Message 1 of 3
Case75
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Canada
Joined: 6/19/2012
Posts: 230
Vette(s): 1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.
I've got an issue with my kickdown not working on my THM 400. The switch above the gas pedal is working as my cowl induction door is functioning when I mash the pedal. I checked at the transmission and I have no power on the orange wire coming from the switch. Where does the wire route from the interior to the transmission?


 
Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ
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Re: Looking for THM 400 kickdown wiring diagram.

Posted: 5/15/13 7:18pm Message 2 of 3
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
The switch above the accelerator pedal has two parts...one side for the cowl induction door, and the other side for the kickdown. Make sure you check both sides for power.
There will be no voltage at the trans connector unless the kickdown switch is fully engaged, and the key is on. If you tested it with the key on, and pedal-to-the-metal, and got no voltage, ya gotta start at the switch. Lemmie look in the Service manual...the wiring diagrams I have do NOT show the wiring for that....



Joel Adams
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Re: Looking for THM 400 kickdown wiring diagram.

Posted: 5/15/13 7:42pm Message 3 of 3
Case75
Former Member
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Canada
Joined: 6/19/2012
Posts: 230
Vette(s): 1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.
Thanks Joel. I'll check both sides of the switch.


 
Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ

in Forum: C3 Driveline Components


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