Hello everyone - I am a brand new member on this site and am thankful that it exists. This is my second try at posting this thread (although similar to many already posted). I lost all my previous typed text due to veering away from this site momentarily. It was actually a quite lengthy text explaining in detail what had happened to my wife's 04 TB out of nowhere. So this will be a more condensed version. We've owned this TB for roughly 4 years now and never had any real problems with it other than a bad ignition coil and a failed secondary air injection pump and water pump. Three days ago, my wife drove it to work just fine but it would not crank over when she went to leave. Both RPM and Speedometer gauges were jumping erratically about mid point of gauges with the key in the run position. Pushing the key to start did nothing but start the erratic gauge reading cycle over. The shift button on the shifter could not be depressed with key in run and foot on brake pedal and the shifter could not be moved out of the park position. When I checked it out, I noted that the interior lights looked dimmer than normal so I boosted the battery with my jumper cables which allowed me to depress the shift button and move the shift lever through all the gears. I went to crank it and it started and my wife drove it home with me following in my truck. Once home, shut it off, I would not restart and gauges erratic as before. Change the ignition switch which cured the erratic gauge condition as well as the locked shifter condition but still no crank. All the fuses are good, no blown ones found. I watched "MAY03LT's" video on "no crank testing and information". Thank you for posting! When I performed the test where MAY03LT connected the test light to the POS terminal of the battery with the test probe in socket 85 of the starter relay socket, had the key turned to crank and the test light illuminated, it failed that test. My test light did not illuminate when cranking. I did have power on sockets 87 and 86. I do not get voltage at the starter solenoid (purple trigger wire) when cranking. Battery has a full charge. Boosting/jumping the battery no longer helps. I can jump and start the truck by jumping across sockets 87 and 30 of the starter relay sockets and the truck will run. I checked the ground from socket 85 to vehicle chasis and the resistance is zero. Now I am leaning towards the neutral safety switch or the wire to and through it as being the culprit. Any thoughts, experience, suggestions, or advice on the next move I should make will definitely be greatly appreciated. I've been chasing this problem for 3 days now and it's becoming a PITA. Thank you for taking the time to read this!