the roadie said:
I can't reconcile these two posts. A bad battery should also fail to start the engine.
The key lock circuit is pretty trivial. It gets power from the ignition switch ACCY/RUN/START bus, through the shift lever PARK position switch then activates the key solenoid whose other end is ground.
If the ACCY/RUN/START circuit (white wire coming out of the ignition switch) is flaky, other things should also be failing, like the transmission control and the PCM. More likely it's a bad or slow key solenoid, PARK mode switch or the wiring between them all.
Does your shift lever lock solenoid work normally? The switch that detects if the shift lever is in the PARK position to release the key is in the console to the right of the shift lever. This is in the same physical assembly as the shift lever locking solenoid that clicks when you press the brake pedal, but electrically, the two functions aren't connected.
So if it is the ACCY/RUN/START circuit will just replacing the ignition switch fix it or is there something more extensive? This is why I ask...
Here's my issue...
I have been dealing with Check engine light on and tranny safe mode (staying in 3rd) for a while. When this first started the repair shop cleared the code (TCC circuit) and cleaned all connections to the Torque Converter Clutch Solenoid (try the easiest thing first), then a week later(next trip to town), check engine light back on, cleared the code again and they then replace the clutch solenoid, it was good for a couple trips to town, then one day went to leave and all was acting up again....check engine light and the transmission staying in 3rd, so we parked it....AND (to add to my frustration) couldn't get the key out
The key wouldn't turn back to the lock position to remove the key, we tried everything from restarting, shifting back into gear pressing the break, nothing would work.....then I had the brainwave to use the command start to start the truck and maybe it would release...it did.
I am convinced these two issues are related form what I am researching.
So now it is currently at a repair shop (week and a half now) and they are stumped, they have resorted taking it to the Dealership (*shutter*), I don't trust our local Dealership's Service department that is why I take it to this private shop, they are trustworthy and great to deal with, and they actually listen to me.
So back to my question, if the ignition switch is my culprit I will convince them to replace it and NOT take it to the Dealership, or I'll get my truck back and replace it myself. But if it's more than just the switch then I will let them do what they deem necessary to fix it.
Getting a weeee bit frustrated and really missing my truck