Can anyone identify this wiring harness?

[Zambeezy]

I've been needing to remove and clean my neutral safety switch for awhile because it doesn't always start in park and want to see if that clears it up. I go to disconnect the harness in the engine bay and I see that this gray harness is also disconnected. I followed the loom down to the transmission but haven't been able to determine its function. Any thoughts?

 

[Dzimm]

I've been needing to remove and clean my neutral safety switch for awhile because it doesn't always start in park and want to see if that clears it up. I go to disconnect the harness in the engine bay and I see that this gray harness is also disconnected. I followed the loom down to the transmission but haven't been able to determine its function. Any thoughts?

 

I'm pretty sure the grey one is for the NSS. I could be wrong I'm just going off of memory.

[Strokermjcomanche]

One for NSS and the other is for the AW4

[Dzimm]

One for NSS and the other is for the AW4

This for sure yes. I just can't remember which is which. Definitely need both plugged in though.

[HOrnbrod]

The white/gray one is for the TCU-to-AW4 cable. How is your AW4 shifting with the solenoids disconnected from the TCU? You do have an AW4 auto?

[Zambeezy]

The white/gray one is for the TCU-to-AW4 cable. How is your AW4 shifting with the solenoids disconnected from the TCU? You do have an AW4 auto?

I believe so. Tag says "30-43LE"

[HOrnbrod]

 

The white/gray one is for the TCU-to-AW4 cable. How is your AW4 shifting with the solenoids disconnected from the TCU? You do have an AW4 auto?

I believe so. Tag says "30-43LE"

 

 

That's the designator for the 2WD AW4. Unless someone has done some creative wiring your TCU is not connected to the transmission. Or your NSS either.

 

Can you supply a picture of the white/gray connector pins? They should look like the below:

 

 

[Zambeezy]

 

 

The white/gray one is for the TCU-to-AW4 cable. How is your AW4 shifting with the solenoids disconnected from the TCU? You do have an AW4 auto?

I believe so. Tag says "30-43LE"

 

 

That's the designator for the 2WD AW4. Unless someone has done some creative wiring your TCU is not connected to the transmission. Or your NSS either. Do you have an electrical FSM?

 

Can you supply a picture of the white/gray connector pins? They should look like the below:

 

 

 

 

I disconnected my NSS because I was wanting to disconnect and clean it. It was connected until today. When I opened the hood to disconnect it I noticed the grey connector was already disconnected

 

Here are my connectors

 

I do have the FSM and it shows the same diagram. 

[HOrnbrod]

If the gray connector was disconnected the transmission wouldn't shift w/o having one of those aftermarket manual shifters installed. But even those have to be wired to the AW4 internal solenoids (S1-S3 on the wiring diagram) to control shifting. Are you manually shifting with the floor (or column) gear shifter now? If so, you won't have 1st gear or O/D.

 

Where's the other half of the gray connector going to the transmission? MIA?

[Zambeezy]

If the gray connector was disconnected the transmission wouldn't shift w/o having one of those aftermarket manual shifters installed. But even those have to be wired to the AW4 internal solenoids (S1-S3 on the wiring diagram) to control shifting. Are you manually shifting with the floor (or column) gear shifter now? If so, you won't have 1st gear or O/D.

 

Where's the other half of the gray connector going to the transmission? MIA?

You talking about the male end? That was sitting right by the female end but I moved it for the picture

 

I haven't been shifting it manually, it's been shifting automatically like normal.

[HOrnbrod]

Your original post:

 

 

I've been needing to remove and clean my neutral safety switch for awhile because it doesn't always start in park and want to see if that clears it up. I go to disconnect the harness in the engine bay and I see that this gray harness is also disconnected.

 

Back to the beginning. Were both the black and white male connectors plugged into their respective female connectors originally?

[Zambeezy]

Your original post:

 

 

I've been needing to remove and clean my neutral safety switch for awhile because it doesn't always start in park and want to see if that clears it up. I go to disconnect the harness in the engine bay and I see that this gray harness is also disconnected.

Back to the beginning. Were both the black and white male connectors plugged into their respective female connectors originally?

When I popped the hood this afternoon, the black (NSS) plug was connected and the grey was not. I disconnected the black so I could take the NSS off and clean it

[HOrnbrod]

I got the impression something was missing in the TCU - AW4 cable connection when I read the original post.  :hmm:  Anyhow, the white connector has a lock tab to prevent it from accidentally disconnecting; maybe it's broken? Suggest plugging it back in tightly and securing it with a couple of tie wraps so it doesn't happen again.

[Zambeezy]

I got the impression something was missing in the TCU - AW4 cable connection when I read the original post. :hmm: Anyhow, the white connector has a lock tab to prevent it from accidentally disconnecting; maybe it's broken? Suggest plugging it back in tightly and securing it with a couple of tie wraps so it doesn't happen again.

Yeah I can't say for certain the status of the connection last time I drove it, although I would say it was likely connected due to the fact that it was shifting fine and shouldn't be able to without being connected. Having traced the loom back to the transmission housing I figured it needed to be reconnected and really don't know how it got disconnected but I'll be securing it well tomorrow.

 

Thanks for the help!