Problems with Shifter

[ladystarlynn]

I am having problems with my shifter. I have spent so many hours trying to figure out what is going on. So I am hoping that you all can help me figure it out.

I have a 99 pontiac Grand prix
3.1 L V6 engine (rebuilt recently)
the shifter is in the floor console
automatic transmission
When we go to put it into gear we have to push the little button on the side of the console next to the shifter to release the BTSI out of the locked position. It is a brand new shifter, so I know that isn't bad. We checked the voltages on the wires and the only one I am not getting voltages out of is the orange/black park/neutral wire in the connector. I did go through my GM goodrich book and found something called BTSI actuator that goes up to the steering column could that be the culprit? I checked all of the fuses and they are good. I am not sure what else it could be. Sometimes when I shift to the consule says that I am in drive but the front display says I am in 3rd gear. What is going on with my car? I keep thinking OMG I have christine for a car. Please help me figure this out> I have spent so much money on her that its making me go broke.

Thanks

[eippermx]

Sounds to me that you need to re-adjust your cable that runs between your transmission and shifter. I had a similar problem to yours and running the FSM cable adjustment procedure did the trick.

[ladystarlynn]

We bought a new park/neutral switch changed that out. Did the adjustment with our shifter cable that runs from the shifter to the transmission. Still did not fix the BTSI problem. We still can not get the BTSI to engage on the shifter to get the car to shift into gear. We looked over the wiring and found that on the Green and white wire it is supposed to be ground butttttttt there is constant voltage on it. Would the BCM have something to do with it? I know that there has to be a short somewhere but I can't seem to find it. I even checked out all of the fuses associated with it. But we do not seem to have a burnt out fuse. What else can I do? I have wasted alot of money on this problem. Bought a new shifter, switch and finally managed to hot wire the thing but I know it needs to be fixed. Someone please help me.

[eippermx]

Sorry my fix didn't work for you. I am looking at the Factory service manual wiring diagram for the 1998 4T60E transaxle. Don't know if this post will help you at all due to your ride being built in '97. Yet, I'll take a shot.
When you say green and white wire, do you mean that as wires? If the wire is green/white then the diagram won't help you. IF the color of the wires iare actually, Light Green and the second wire is white, then those colors correspond to the wiring diagrams in the book. Read on for my observation of the diagram from the 1998 GP 1st Edition FSM for the wire routes.

Discussion
White Wire
The white wire runs from the instrument cluster parity input (B C1) through the underhood accessory wiring junction block pin A1 to F1. From F1 it's spliced. From F1 from the splice one wire goes to the PCM parity input Pin 16 C2. The other side of the splice goes from F1 to the transaxle where it is switched to ground depending on the position of the shift to ground. The diagram shows white wire at the park position and its tied to ground via a black wire. Voltage on the white wire can be grounded only in the park, neutral, or 3, 2, or 1 positions.
Light Green

Lt Green appears on two diagrams.
Diagram #1

Lt Green runs between the transaxles's 1-2 shift solenoid and the PCM pin 4.
Diagram #2

LT Green wires appears in three areas. These LT Green wires carry power that comes from the backup LP 10 amp fuse through the transaxle range switch.
From the transaxle range switch in the park position, the LT Green wire goes from C to E4 of the underhood accessory wiring junction block splices to two places. The place it goes is to the BCM D6 C2 this same wire from the first splice is also spliced and appearers at the rear compartment lid release relay pin A1. On the other side of the underhood accessory wiring junction block splice, LT green again goes to another splice at the block. The first side of the splice goes the other side of the rear compartment lid release relay, C!. The other side of the splice goes to the rear compartment lid release switch (trunk).
When the transaxle range switch is in reverse, power is applied the backup lamps and grounds across their elements via a black wire and power is applied to the inside rearview mirror if you have the electrochromic option.

Don't know if this post will help you or not. PM me if you want any other info from my FSM.