TH350C Lockup Connector - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Yupiamlo · 09-29-2011, 05:25 PM

Hey I have an 85 Chevy C10, 2wd, 305 with a th350c trans

Theirs a 4 pin electrical connector that plugs into the side/top of the trans that controls lockup, factory its controlled by vacuum... all I need to know is what pins need to get power and ground to control the lockup for extended highway driving...

Any help would be awesome

-Adam

Yupiamlo · 09-29-2011, 05:31 PM

rwhit57 · 09-29-2011, 10:30 PM

I know the green wire goes to the vacuum switch, at least on mine it does. The black wire should be ground, so that leaves one of the others to the brake switch. That's the best I can do for now.

jdheff1982 · 09-30-2011, 11:56 AM

I would imagine the pink wire is your power. Seems to be a common theme on these trucks to use pink for power.

Yupiamlo · 10-02-2011, 11:07 PM

Alright so if I send power to the pink wire, and ground my black wire, lock up should kick on right?

Yupiamlo · 10-07-2011, 05:42 PM

bumpin that last post

rwhit57 · 10-07-2011, 07:23 PM

Only one way to find out. I don't see that you could hurt anything if it's wrong, it just won't lock up. I'm thinking that will do it, but you will have to be able to turn it off (unlock). What happened to the factory setup?

Yupiamlo · 10-25-2011, 01:51 AM

Alright Ill give it a go haha... well factory was run off of vacuum switches and what not, and in the midst of cleaning the engine bay they removed, but thats alright I can put it on a lighted toggle switch, and only use it for extended highway.

Yupiamlo · 10-26-2011, 05:49 PM

Okay, SO... I ran power to the pink wire and grounded the green... fuse popped, so than I tried power to red and grounded blue... fuse popped quicker... Does anyone know more? Is green or blue power?

Any help would be awesome

rwhit57 · 10-26-2011, 10:13 PM

Quote:

Originally Posted by Yupiamlo

Okay, SO... I ran power to the pink wire and grounded the green... fuse popped, so than I tried power to red and grounded blue... fuse popped quicker... Does anyone know more? Is green or blue power?

Any help would be awesome

The black is ground. The green should be power that originally went to the vacuum switch. The other wires would have gone to the relay or pressure switch and the brake switch.

09-29-2011, 05:25 PM	#1
Yupiamlo Registered User Join Date: Aug 2010 Location: North Wales, PA Posts: 82	TH350C Lockup Connector Hey I have an 85 Chevy C10, 2wd, 305 with a th350c trans Theirs a 4 pin electrical connector that plugs into the side/top of the trans that controls lockup, factory its controlled by vacuum... all I need to know is what pins need to get power and ground to control the lockup for extended highway driving... Any help would be awesome -Adam

09-29-2011, 05:31 PM	#2
Yupiamlo Registered User Join Date: Aug 2010 Location: North Wales, PA Posts: 82	Re: TH350C Lockup Connector

09-29-2011, 10:30 PM	#3
rwhit57 Registered User Join Date: Jan 2011 Location: Tulsa,Okla Posts: 590	Re: TH350C Lockup Connector I know the green wire goes to the vacuum switch, at least on mine it does. The black wire should be ground, so that leaves one of the others to the brake switch. That's the best I can do for now.

09-30-2011, 11:56 AM	#4
jdheff1982 Registered User Join Date: Aug 2011 Location: Wichita, KS Posts: 318	Re: TH350C Lockup Connector I would imagine the pink wire is your power. Seems to be a common theme on these trucks to use pink for power. __________________ Project and Truck Specs: http://67-72chevytrucks.com/vboard/s...d.php?t=483381

10-02-2011, 11:07 PM	#5
Yupiamlo Registered User Join Date: Aug 2010 Location: North Wales, PA Posts: 82	Re: TH350C Lockup Connector Alright so if I send power to the pink wire, and ground my black wire, lock up should kick on right?

10-07-2011, 05:42 PM	#6
Yupiamlo Registered User Join Date: Aug 2010 Location: North Wales, PA Posts: 82	Re: TH350C Lockup Connector bumpin that last post

10-07-2011, 07:23 PM	#7
rwhit57 Registered User Join Date: Jan 2011 Location: Tulsa,Okla Posts: 590	Re: TH350C Lockup Connector Only one way to find out. I don't see that you could hurt anything if it's wrong, it just won't lock up. I'm thinking that will do it, but you will have to be able to turn it off (unlock). What happened to the factory setup?

10-25-2011, 01:51 AM	#8
Yupiamlo Registered User Join Date: Aug 2010 Location: North Wales, PA Posts: 82	Re: TH350C Lockup Connector Alright Ill give it a go haha... well factory was run off of vacuum switches and what not, and in the midst of cleaning the engine bay they removed, but thats alright I can put it on a lighted toggle switch, and only use it for extended highway.

10-26-2011, 05:49 PM	#9
Yupiamlo Registered User Join Date: Aug 2010 Location: North Wales, PA Posts: 82	Re: TH350C Lockup Connector Okay, SO... I ran power to the pink wire and grounded the green... fuse popped, so than I tried power to red and grounded blue... fuse popped quicker... Does anyone know more? Is green or blue power? Any help would be awesome



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