i have been searching half the day lookin for the answer.

i have a 91 firebird. 700r4. i already know that there are kits out there to make this work, that is not what im lookin for rite now , because i dont have the money for that now.

i have the purple wire from the brake switch hooked up

now i still have the blue one and the tan and black one.

i tried hooking the tan and black to a ground while the car was in drive, and also in second. i also tried hookin it to a pos. wire. i also tried hookin both to a ground. and also one to a ground and one to pos. vise versa.

the car does not change in idle , or in gear.

where exactly to i need to hook these wires. witch one is a groun and witch is pos. or are they both grounds etc. and also would the car stall if it was workin rite, or not . or is the only way to tell if its workin is , to take er for a spin?

thanks for all help givin

 

You want to turn lockup on or off manually?
To prevent lockup , all you need is to put a switch on one of the two wires going to the brake switch.
When switch is open ( off ) , no power can go to the lockup solenoid regardless of what the computer is trying to do

 

To check TCC operation
Grounding pin F ( to pin A ) on the the ALDL connector will lockup the convertor ( if lockup is working )

 

im sorry i should have been more clear.

i have no computer in the car anymore, all i have are the wires comming from the tranny goin through the firewall on the pass side. i just need to know witch wires i need to hook up , and where to make the tcc work with a switch. i dont want a fancy kit or anything like that for now. i would however like to at least be able to lock it with a switch for now.

i tried hookin the wires up various ways , and i cant tell if its locking the tcc or not. it doesnt stall at a stop or anything like that. how do i tell if its working. also the whole car is rewired for carb. and all i have are the wires commin off the trans

 

Lucky for you I just did this to mine yesterday. You are correct, there are three wires..

purple
blue
tan/black

For the purple wire, you need to supply +12v at all times except when the brakes are pressed. (this should still be hooked inside of the car, as you said earlier)

blue can be different depending on year, on mine the blue one is grounded always EXCEPT when it is in 4th gear. The norm tends to be the opposite, however. On your's, it will likely be a ground when the transmission is in fourth. The easiest way to determine this is to use either a test light or a volt meter. Put the negative (-) lead to the blue wire and the positive (+) lead to a random hot wire that is hot at all times when the key is on. For what you are trying to do, you don't need this. This was to let the computer know when it was in overdrive.

The tan/black wire is where the action happens. In order to engage the torque convert lockup clutch you need to supply a -12v signal to this. The easiest (and cheapest) way is to use a switch. Connect one side of the switch to a quality ground (on the body is fine), and the other side to the tan/black wire.

Based off something I read on this site, if you start rolling from a dead stop with this engaged, when it hits second it should bog really low and be very touchy. Mine seems to bog just a little, but then again maybe mine has more power than the car in the article i read (i have no idea) which might have caused it to seem like more of a bog.

I don't know for sure if mine is locking properly or not, but I do know that the wiring is hooked up correctly because I had the pan off of mine yesterday and I have traced the wires all the way to the lockup solenoid itself. (my tranny has 230k miles on it so it probably doesn't lock as well as your's will)

In case you were wondering, I'm not telling you this just off a whim, I actually got the schematics and set it up based off that.

Hope that helps!

 

Oh and btw, it won't stall at a stop because the factory purple wire runs through a brake switch that disconnects the lockup solenoid whenever the brake is pressed at all.

 

 

That's not the same one I was using but it still shows the same thing. There is actually another version of the schematic that shows the blue wire (the one that tells the computer when it is in 4th gear) closed always except 4th gear, exactly opposite of above. I don't know exactly which years were setup which way, but I know mine is closed except when in 4th.

In case this helps anyone else, here is where I found my schematics..

http://www.fastgm.com/wiring

The first two of those have the different diagrams in them, so hopefully that helps.

 

Another alternative is to wire 12V through the brake switch to the 4th gear switch inside trans then to TCC solenoid ( requires dropping pan ) so lockup always comes on in 4th gear and you don't need a seperate switch or have to remember it is turned on

 

thanks guys for the good info i really appreciate it

 

i have a ? can someone tell me what the three wires do on my 1989 irocz 700r4 tras one's blue one's tan and one i can't tell what color it is please help

 

jzmas01 - if you read this thread, it all gets explained - why ask what was just answered here? Read this also: https://www.thirdgen.org/forums/carb...c-control.html

Anyone reading this thread for future - you need to realize that different years 700R4s have different switches inside for the locking solenoid, and you need to throroughly read this sticky to determine which switches you have: https://www.thirdgen.org/forums/carb...c-control.html