NSS/TCC wiring confusion

[hear]

First off, no telling what bubba did before I got it. Jeep is an 2002 automatic. The jeep itself is in a friend's garage, but I have the transmission and the tiny section of the harness that connects the NSS & TCC. Some of the wires were cracked so I'm in the process of splicing new wires, but something about this didn't feel familiar so I decided to check the wiring diagrams.

Problem 1
The connector that we disconnected over top of the trans appears to be C154 in the FSM. C154 is a 4 pin connector on the transmission side, but I'm staring at a 5 pin connector. But even so, the FSM is confusing because it shows both sides of C154, the engine side and the transmission side. I don't know how those are supposed to fit into each other regardless. But that mine is different from both of them is a strange curveball. And I know better than to rely on the wire colors, but

Problem 2
According to the FSM, the NSS & brake backup light circuits goes through C154 (page 8W-15-8), on the VT/WT, BR/LB, and VT/BK wires, which I have. But the TCC circuit does not show going through C154; it shows going directly to the fuse box (which I find surprising, I only recall one bit of harness that drops down to the transmission, maybe they're all in the same loom but the TCC bypasses the connector?). I'm probably speaking to the void, but were there some years where these were part of the same connector? It would make a ton of sense to do it this way, but what I have definitely doesn't correspond to the 2002 FSM.

Problem 3
My TCC connector isn't there; Bubba literally soldered the wires to the pins on the TCC plug at the back corner of the transmission. But that's not my problem. I've never seen a connector that would fit this plug. Every 32RH I've looked at has this passthru connector for the TCC. The solenoid plugs into it inside the case, and the harness plugs into it on the outside of the case. Both connectors are identical, and they're secured with a metal clip (first 2 pics).

But what I have is more like this, which I found in this ebay ad, which says it's for 98-up. The other pictures show those leads are connected to the solenoid....so I guess Bubba put the passthru connector in backwards? There is zero chance it came from the factory with exposed leads outside the case. Maybe it makes sense, since the solenoid in the VB had the above connector, so for it to work he would've had to cut the connector on one side or the other. Soldering the other side of this connector with the transmission in the vehicle must've been a great time.

 

[NskLJ]

First off, no telling what bubba did before I got it. Jeep is an 2002 automatic. The jeep itself is in a friend's garage, but I have the transmission and the tiny section of the harness that connects the NSS & TCC. Some of the wires were cracked so I'm in the process of splicing new wires, but something about this didn't feel familiar so I decided to check the wiring diagrams.

Problem 1
The connector that we disconnected over top of the trans appears to be C154 in the FSM. C154 is a 4 pin connector on the transmission side, but I'm staring at a 5 pin connector. But even so, the FSM is confusing because it shows both sides of C154, the engine side and the transmission side. I don't know how those are supposed to fit into each other regardless. But that mine is different from both of them is a strange curveball. And I know better than to rely on the wire colors, but

View attachment 604567


View attachment 604589


Problem 2
According to the FSM, the NSS & brake light circuits goes through C154 (page 8W-15-8), on the VT/WT, BR/LB, and VT/BK wires, which I have. But the TCC circuit does not show going through C154; it shows going directly to the fuse box (which I find surprising, I only recall one bit of harness that drops down to the transmission, maybe they're all in the same loom but the TCC bypasses the connector?). I'm probably speaking to the void, but were there some years where these were part of the same connector? It would make a ton of sense to do it this way, but what I have definitely doesn't correspond to the 2002 FSM.

View attachment 604576


View attachment 604577


Problem 3
My TCC connector isn't there; Bubba literally soldered the wires to the pins on the TCC plug at the back corner of the transmission. But that's not my problem. I've never seen a connector that would fit this plug. Every 32RH I've looked at has this passthru connector for the TCC. The solenoid plugs into it inside the case, and the harness plugs into it on the outside of the case. Both connectors are identical, and they're secured with a metal clip (first 2 pics).

View attachment 604568
View attachment 604570

But what I have is more like this, which I found in this ebay ad, which says it's for 98-up. The other pictures show those leads are connected to the solenoid....so I guess Bubba put the passthru connector in backwards? There is zero chance it came from the factory with exposed leads outside the case. Maybe it makes sense, since the solenoid in the VB had the above connector, so for it to work he would've had to cut the connector on one side or the other. Soldering the other side of this connector with the transmission in the vehicle must've been a great time.

View attachment 604571

View attachment 604590

#1 the manual is wrong, refer to wire colors or use VOM to test trans side
#2 backup lamps go through the switch not brake lamps
#3 the two wires at the back ( last two pictures) are the tcc. If you cannot get the connector you may have to pass the wire through and connect them outside

 

[hear]

That was a misspeak in my part, I meant to say backup lights, not brake lights.

The TCC solenoid connector sort of resolved itself. The new solenoid came with the same exact passthru connector, so I came up with a brilliant plan.

* cut the connector off the old solenoid
* cut the soldered connections off the existing passthru
* put the new passthru into the trans with the correct orientation (eg. bare leads inside the trans)
* spliced the old connector into the outside harness

This effectively restores the wiring to factory, assuming that connector in #1 is correct. Sorry no pics!

 

[hear]

I’m confident the broken wire on the solenoid and the missing insulation on the 2 NSS wires was doing me no favors.

 

[hear]

FYI, the bird doo on the hood is OEM.

 

[tworley]

Good info in this thread. Sub'd for later.

 

[hear]

Upon further review, on the engine side of the transmission for C154 my connector looks the same as the FSM. The wiring isn't quite right, of course, since mine has the TCC circuit running through it.

I might scan the other years to see if maybe I have a different year's harness. Would be interested to see what other 02 owners have for this connector too.