Thread: disable lockup 1999 regal gs

Bringing this back again. From what I've been reading (as I want to disable it as well) it looks like if you pull off that connector and on the harness cut the brown and pink wires you have cut the tcc solenoid out of the loop. You have to replace it with something so it won't throw a code. From what I read, you can insert a 194 lightbulb between the brown and pink wires to act as load on the circuit. The computer thinks it's enabling and disabling the tcc but its actually just lighting a light bulb.

I will be trying this tonight after work. I hope it's of use to you, I will post my findings after I give it a whirl.

See, now that sounds clever. Though I wonder whether the PCM is that "stupid." If it "thinks" it is feeding the TCC power one would think that it would "know" that the load characteristics didn't change after doing it. Does anyone know whether it monitors that?

It seems to me that you'd actually have to splice into the pink wire and run a new connection to brown with the bulb in between. If you just kill the pink altogether you also loose the shift solenoids. (If it wasn't wired that way you could just pull the TCC fuse - at least on my Silhouette. The problem is that this cuts power to TCC and both shift solenoids. So the pink has to keep feeding the case, but you'd have to tap into it to provide the completed circuit for the brown.

In my case I'm not sure I'm willing to mess with it in just this way. But I'd be happy to hear if you give it a whirl.

I disconnected only the brown tcc solenoid wire. It made the "chuggle" during shifts go away for the remainder of that day. However, the next day it seems like it's back, and the tach which was stuck at zero is now bouncing everywhere like a madman.

The tach is supposed to be controlled only by the crankshaft position sensor, but I replaced both of those and it is still doing this. There must be some other part interfering with the tach signal.

I'm not sure what's wrong at this point. This car has a terrible electrical system.

Messed with the car again. Made the shift chuggle go away by erasing check engine codes which I didn't do before. Now it shifts fine although it still shifts slow. But no jerking. Tach signal is still intermittent, so I'm thinking either my icm is bad or the pcm is weirded out.