m1165a1 transmission electrical help

[Jwf]

ok so I was able to pin out j Z and a from the wiring diagram I had to order some test leads before I try to test it but I have them identified at least. however when the tcm is plugged in everything on that harness gets ignition power 4 get 24 and 2 get 12v with the tcm unplugged 3 of them loose ignition power 2 of those are going to the pins. also I believe it was j has continuity with 2 wires in the harness neither of which is clean one is 6 ohm the other is 12 ohm

 

[Milcommoguy]

Me thinks your missing this panel with the parts for control and breaker feeding the TCM.

GI Joe hi-jacked the panel ? CAMO

 

[Jwf]

Me thinks your missing this panel with the parts for control and breaker feeding the TCM.View attachment 955223

GI Joe hi-jacked the panel ? CAMO

Yea that panel is gone. Any chance you would be willing to get me some pictures of the harness and where is goes?

 

[Mogman]

ok that seems east enough now what exactly am i missing on the transmission side of things? is it just the breaker and power from the battery or are there relays and stuff missing as well?

Look at the page I referenced, the breaker, 24V switched, 12V unswitched before the relay and the relay are all behind the right seat.
Break the wires out and look for 14V switched (in run position) you will not find the 12V unswitched because you have no connection running between the batteries, that also means you do not have the lead heading out to the 14V (12V) tap on the regulator, you need to download the schematics for the truck also and look them over very carefully, you look to have a long row to hoe to get that butchered wiring system back together so patience and allot of getting used to reading schematics will be the order of the day.
What is the serial number of your truck, I will see if I can find the schematics for you.

 

[Mogman]

The first pic is what is located behind the seat, the second is the basic power setup.
It looks like you have already noticed but there are both upper and lower case pins on that TCM plug so you have to be mindful of that.

 

[Jwf]

The first pic is what is located behind the seat, the second is the basic power setup.
It looks like you have already noticed but there are both upper and lower case pins on that TCM plug so you have to be mindful of that.

The serial number is 313618 I did figure out the upper and lower case I can already tell this is going to be a nightmare I really appreciate everyone's help so far

 

[mrfarb]

Don’t despair - I bought a truck once that was missing this panel behind the seat - it’s actually not difficult or complicated to fix. It would help immensely if you had another truck sitting there to follow the wiring as you fix it but pics (along with the wiring diagrams above) will help.

That panel has a 12v relay that you have to have to connect to the TCM or your transmission will stay in 2nd gear eternally. It’s really all you need to have there to get going.

My suggestion, buy a used panel with the relays on it if you can. I recently saw one but looked and it was sold. I will take my panel apart and take a few photos for you. I can’t find my old pics I took.

edit : here’s a link to what you need, at least see the pics and note the green relay in there is for the TCM.

Hmmwv M1151 Battery kick bus panel floor M1165 Humvee OEM Rev Ecv M1167 M1152 | eBay

USA sales only to us citizens only. EUC controlled item.

ebay.us

 

[Jwf]

Don’t despair - I bought a truck once that was missing this panel behind the seat - it’s actually not difficult or complicated to fix. It would help immensely if you had another truck sitting there to follow the wiring as you fix it but pics will help.

That panel has a 12v relay that you have to have to connect to the TCM or your transmission will stay in 2nd gear eternally. It’s really all you need to have there to get going.

My suggestion, buy a used panel with the relays on it if you can. I recently saw one but looked and it was sold. I will take my panel apart and take a few photos for you. I can’t find my old pics I took.

That would be great thank you

 

[Mogman]

Don’t despair - I bought a truck once that was missing this panel behind the seat - it’s actually not difficult or complicated to fix. It would help immensely if you had another truck sitting there to follow the wiring as you fix it but pics (along with the wiring diagrams above) will help.

That panel has a 12v relay that you have to have to connect to the TCM or your transmission will stay in 2nd gear eternally. It’s really all you need to have there to get going.

My suggestion, buy a used panel with the relays on it if you can. I recently saw one but looked and it was sold. I will take my panel apart and take a few photos for you. I can’t find my old pics I took.

edit : here’s a link to what you need, at least see the pics and note the green relay in there is for the TCM.

Hmmwv M1151 Battery kick bus panel floor M1165 Humvee OEM Rev Ecv M1167 M1152 | eBay

USA sales only to us citizens only. EUC controlled item.

ebay.us

One slight correction, it is a 24V relay controlling the 12V switched feed to the TCM

 

[Jwf]

awesome thank you thats a huge help

One slight correction, it is a 24V relay controlling the 12V switched feed to the TCM

 

[Jwf]

Just wanted to give everyone an update with the schematics and advice everyone provided i was able to wire up a relay and breaker and got it shifting now. It shits a little hard but I figured that will go away once it's driven a bit. I heard something banging underneath like the driveshaft is making contact with somthing so ill have to look at that i suspect its the muffler but we will see. I really appreciate everyone's help with getting this figured out thank you all again.

 

[Retiredwarhorses]

Yea that panel is gone. Any chance you would be willing to get me some pictures of the harness and where is goes?

I have those panals either bare or fully loaded with the transmission relay, trans circuit breaker and 12/24v power strips for accessories for sale if you need any of it.

 

[Jwf]

I have those panals either bare or fully loaded with the transmission relay, trans circuit breaker and 12/24v power strips for accessories for sale if you need any of it.

If this fix doesn't last ill reach out thank you

 

[mrfarb]

Just wanted to give everyone an update with the schematics and advice everyone provided i was able to wire up a relay and breaker and got it shifting now. It shits a little hard but I figured that will go away once it's driven a bit. I heard something banging underneath like the driveshaft is making contact with somthing so ill have to look at that i suspect its the muffler but we will see. I really appreciate everyone's help with getting this figured out thank you all again.

Maybe check the bolts that hold the 4 axles to the differentials too, pretty common to have them missing or loose.

 

[Jwf]

Ill definitely take a look at that thank you

 

[Retiredwarhorses]

Ill definitely take a look at that thank you

if you have a REV truck and the body bushings are shot? The body sits lower and the rear drive shaft will contact the protective plate on the fuel tank…also a misadjusted fuel tank hanging too low.

 

[Jwf]

I believe it is a rev truck it has the gearbox driven fan and the body bushings are definitely shot they are basically just crumbling to nothing is there any preferred bushings to use? Id prefer whatever will last the longest. Thank you

 

[Retiredwarhorses]

I believe it is a rev truck it has the gearbox driven fan and the body bushings are definitely shot they are basically just crumbling to nothing is there any preferred bushings to use? Id prefer whatever will last the longest. Thank you

its an issue with the early body mounts on REV’s, the new poly body mount from the distributor is black in color “not blue or purple” and run about $60ea….just ordered 4 sets.

 

[Jwf]

its an issue with the early body mounts on REV’s, the new poly body mount from the distributor is black in color “not blue or purple” and run about $60ea….just ordered 4 sets.

Ok i checked this morning the shaft is hitting the sheild on the fuel tank I jacked up the passenger side of the body and it seems to clear ill be ordering some body mounts. thank you

 

[Jwf]

I got 6 sets ordered and figured id give everything a once over found a hub bolt that was cross threaded and got that fixed I also found 2 tubes above the rear driveshaft cut that look like they went through the floor, there are 2 grommets in the floor between the rear seats the hoses fit into 1 line had some thick oil in it could these of been for rear ac? The truck has an ac compressor but the ac doesn't work i havent started troubleshooting that yet but if its related it would be nice to know.