Differences in VIM modules? (and other Trans harness questions)

[DREDnot]

Im starting to piece together the trans wiring harness from the Frankenstein parts box.

According to the TM, at the tail end of 20-5, I seem to have the TID 1 version of the transmission.





Then there is this illustration...



Im trying to figure out what VIM I need to go with and the correct connectors.

This is the stump of trans harness the truck came with.



This is the TEPSS I'm hoping is correct...It was purchased separately and is not from this truck.



My biggest question is what the correct VIM for my application looks like?
The 24 pin and 31 pin referenced have me wondering? According to the table, I want the one with 31 pins. All the pics I've seen of actual VIMs have lots of ports and none that are round 31 pin.

Also any pics of the round port VIM would be appreciated.

And how it mounts. All I had was this mess to go by



I have a replacement harness coming from a fine member here so hopefully that will have some more clues to the VIM mystery

 

[Suprman]

The vim in the pic with the harness you got off the old eBay auction is the correct one. I can post a better pic tomorrow

 

[Suprman]

29509889

 

[DREDnot]

OK.
Searched that part number and found this pic on Ebay



So the small connector jives with the harness I got.
Is the large connector the same no matter what year? I have an unknown year PDP/harness assembly that has the PX33 plug that fits that VIM that I will have to cut and graft onto my harness.

 

[Ronmar]

The earlier pics you posted are WTEC III ECU’s...

That last batch is a WTEC II VIM 24V 6 relay(looks just like mine It mounts up under the passenger dash with those 3 tabs and 3 10mm bolts...


Oops, pic 7 and 8 above are of a WTEC2 keypad attached to ECU...

 

[DREDnot]

The earlier pics you posted are WTEC III ECU’s...

Huh...I was under the impression that the big one was WTEC2 and the smaller one was WTEC3

 

[DREDnot]

Man...you scared me there. Went and looked up the part numbers and the TM(24-P) shows the WTEC2 as being 29519627



Not sure what the small one is, though. It has a different part number that the listed WTEC3 and a different connector from the illustration

 

[Ronmar]

Huh...I was under the impression that the big one was WTEC2 and the smaller one was WTEC3

View attachment 767978

View attachment 767979

These are pics of a WTEC II ECU(has keyboard attached and wider display). The smaller one is a WTEC III control panel(narrower display opening).

On a WTEC II, ECU and keypad are mounted together in the drivers dash and VIM is used to provide interface and relay outputs to the vehicle mounted under passenger dash.

On a WTEC III the keypad is mounted by itself in the drivers dash, the ECU is mounted under the passenger dash where the VIM would be on a II, and no VIM is used(requires standalone relays mounted in the power dist panel...

 

[Suprman]

I think the small keypad is wtec 4 or 5.

 

[beantown]

Huh...I was under the impression that the big one was WTEC2 and the smaller one was WTEC3

View attachment 767978

View attachment 767979

I need one of these 29519627 i have a 1994 m1081 2.5 ton 4 wheel cab over trrunk water leaked through turret and damaged mine Cecil 252 467 3852 NC

 

[Suprman]

I have tcms. Whats your trans serial?

 

[beantown]

I have tcms. Whats your trans serial?

at0665b-ec, nhook6, 5/21/94, part number 29519627, nsn2520-01-421-1771

 

[leibuys]

I have tcms. Whats your trans serial?

Do you still have WTEC II trans controllers? I'm looking for one currently. Any help would be appreciated. P/N is 29519627 Model MD3070PT

 

[Suprman]

Yes do you need the tcm and keypad or just tcm? What is your trans serial?

 

[leibuys]

Yes do you need the tcm and keypad or just tcm? What is your trans serial?

I have a shop both cleaning and testing both the keypad and TCM, one or both is likely failed as it appears the water entered through the keypad but i'll find something out in the next day or so. I'd like to be prepared either way. Could you kindly provide pricing both separate and together?
Appreciate the follow up.

I'm trying to get some more information on wether or not a WTEC 2 with a diferent part number could be programmed or if the PROM/EPROM chip could just be swapped, I don't quite understand the compatibility as I'm not very familar wiht this yet. Could you provide any info on this so i could understand better?

It is allowing images now, so here is the serial # etc.

Thank you...