I've spent a LOT of time in the wiring diagrams for the 02 over the past few days trying to trouble shoot a TCC code, no backup lights, evap codes, and a Fuse #11 that keeps blowing. Based on prior experience, I was expecting to find a rotten section of harness over the top of the transmission, but so far that isn't the problem. The transmission is currently out so I've gotten to take a really good look at all that from underneath the jeep. But I can only go so far back before you get tangled up in the control arms etc.
On my 97 I've been able to disconnect the backup lights and the fuel pump (maybe some other stuff?) at the back driver's side corner and then pull the entire harness up into the engine bay. But on the 02 diagrams, there is no such connector. The fuel pump goes directly from the pump to C103 (black connector on firewall) to the relay. The fuel sender goes directly to the PCM for both the sensor signal & sensor ground. I'm sure there's a good reason why it didn't use the same ground as the pump, which is G105 at the engine block. But that's a rabbit hole for another day.
It does look like the reverse lights are wired differently on the 97 vs the 02 (but maybe I should doublecheck before I state it as fact). On the 02 the backup lights go from the NSS to C154 (on top of the trans) to C104 (gray connector on firewall) to C106 (black 100 way connector in the footwell) to C322 which is also part of the 100-way connector manifold. I know I disconnected something at the back corner of my 97 to free up the harness, and I swear the fuel pump was part of that because I forgot to plug it back in and it wouldn't start. Sometimes I learn the hard way, but I learn just the same.
So....is it really possible that the section of harness that runs over the transmission all the way to the back corner has to be disconnected at the back of the tail light & at the fuel pump itself in order to be removed? Or is the diagram wrong? I didn't get a chance to look when I was under the jeep, and it's an hour away (making this job immeasurably more difficult).
On my 97 I've been able to disconnect the backup lights and the fuel pump (maybe some other stuff?) at the back driver's side corner and then pull the entire harness up into the engine bay. But on the 02 diagrams, there is no such connector. The fuel pump goes directly from the pump to C103 (black connector on firewall) to the relay. The fuel sender goes directly to the PCM for both the sensor signal & sensor ground. I'm sure there's a good reason why it didn't use the same ground as the pump, which is G105 at the engine block. But that's a rabbit hole for another day.
It does look like the reverse lights are wired differently on the 97 vs the 02 (but maybe I should doublecheck before I state it as fact). On the 02 the backup lights go from the NSS to C154 (on top of the trans) to C104 (gray connector on firewall) to C106 (black 100 way connector in the footwell) to C322 which is also part of the 100-way connector manifold. I know I disconnected something at the back corner of my 97 to free up the harness, and I swear the fuel pump was part of that because I forgot to plug it back in and it wouldn't start. Sometimes I learn the hard way, but I learn just the same.
So....is it really possible that the section of harness that runs over the transmission all the way to the back corner has to be disconnected at the back of the tail light & at the fuel pump itself in order to be removed? Or is the diagram wrong? I didn't get a chance to look when I was under the jeep, and it's an hour away (making this job immeasurably more difficult).
