Hello Roy,
I ended up using 29-way connector from a 2006 GTP. All I had to do was splice the 49 and 20 way connectors. Here is an update:
This G6 GTP 3.9 Transmission FR3 4T65E version has been registering ISS 717 code for almost 2 years with no symptoms that the driver could detect. The ISS was replaced but that didn't erase the code. Recently, the TCM was replaced and programmed: Still no change. This past week, the 49-Way connector and wires to the TCM were replaced by splicing. The code 717 was registered again. Finally- 2 days ago, the 20-Way external connector and wires to the transmission� harness were replaced by splicing as well. When the job was done, everything was put back together� except the Electronic Brake Module Connector was left unplugged *by mistake* as the car was being tested. Later on, the connector to the EBM was reconnected while the car was running and the scanner connected to the DLC *again, I think the engine should've been turned off while� reconnecting the brake module.*� The scanner initially displayed a message: "Communication with the Body Control Module was Lost."� No code was registered. The car was taken for a drive cycle and the check engine light was actively cleared. Few minutes into the drive, the following occurred:
1. Code: 2534 Ignition switch/run low voltage
2. P0700 transmission
3. P0300 misfire
4. Check engine light blinking (not solid)
5. Acceleration began to suffer
6. Louder than normal noise�
All spliced wires were rechecked for continuity.�
What happened? The ignition wire (pink circuit 1339 or simply 39) from TCM 48-way connector pin 31 to transmission harness 20-way connector pin E showed no continuity. Is this normal when the key is in the off position? Does this wire go through a fuse or fusible link? The wiring diagram shows transmission fuse 4 in the junction block but no fusing in the wire in between pin 31 and pin E unless I am not reading the diagram correctly. All other connections showed continuity
I am not sure if I should test while the engine is running or while the key is in the on position or for that matter while battery voltage and ground are connected. Could this be a simple splicing issue or more? I think the misfire is the result of low voltage rather than damage to ignition switch.� �
Monday, June 21st, 2021 AT 8:48 PM