Will not start, where is the back-up neutral switch located?

Hi,

If you are referring to the park/neutral position switch (PNP), it is integral to the digital transmission range sensor. See pic 1 below.

When you have the key on and shift through the gears, are the gear indicator lights in line with the gear you selected? When in park, does the P light up? I ask because it could be a cable adjustment issue.

Let me know. Also, see if will crank in any gear. If the cable is off enough, it could happen. Just make sure to keep your foot on the brake. LOL

Let me know.

Take care,

joe

See pic below.

Hi,

I found it. That transmission must not have been used very often on these vehicles. Anyway, the range sensor (PNP) is integral to the transmission control module (TCM)

The TCM for the transmission is mounted on top of the main control valve body. The control module for the transmission has been designed to operate correctly in the environment in which the TCM is located.

If you look below, I attached two pics. Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.

Hi,

Are you sure the relay has power where it needs to be as well as a signal ground when you turn the key to the start position? Also, I attached the starting circuit wiring schematic below so that you have a reference.

If you haven't already, we need to recheck the relay. Note there are 4 pins on the relay. Each pin will be numbered on the relay itself.

Pin 85 should have power when the key is in the start position only. Confirm that first. Next, pin 30 should have power at all times. Confirm that.

Now, pin 87 is what sends power to the starter motor, so if the starter is good, it should engage if the relay is triggered. For it to trigger, the PCM has to provide a ground path via pin 86. So, to check for ground, take a test light and connect the alligator clip to the battery-positive terminal. Take the test lamp and probe connector pin 86 for a ground path when the key is in the start position. If there is a ground available, the test lamp should turn on.

Let me know what you find so I know where to go next. Note: If you haven't already, confirm the fuse has power to and from it.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Take care,

Joe

See pics below. Note: I had to cut the schematic in two so you could read it. I did overlap the two so you can follow from one to the next.

Hi,

You are very welcome, but I don't feel like I helped. Honestly, it isn't hard to test. If you run into issues, I can help you through them. However, I understand if you are not comfortable.

Let me know if you change your mind. Also, feel free to come back anytime in the future if you have questions.

Take care,

Joe

You are very welcome. Also, absolutely let me know what they say. I'm interested in knowing.

Take care,

Joe