caseyjones_81
Newbie
I’ve searched thru the forum and found posts that sort of have the same issue as in having but not really, and most of those posts didn’t have any answers or follow up on what the OP did to fix the prob. Here’s what I have going on.
I have a 98 ex cab Z71 5.7 with auto trans and NP1 - 243 transfer case. 4x4 has worked great for years and one day I went to lock it in and the TCCM under the dash started clicking rapidly and wouldn’t stop until I unhooked the battery. And after that it hasn’t worked at all since. I’ve changed every part there is to change. Front diff actuator, encoder motor, 4x4 switch on top of the T case, speed sensor, 4x4 push button switch on the dash, TCCM and neutral safety-range selector switch on side of trans. I’ve checked all of the fuses and wiring under the truck and under the hood and it’s all good. No bare places, no visibly messed up plugs, it’s all good. When I turn on the key the buttons on the dash light up and go back off and then nothing is lit up, nothing happens when I push the buttons. I’ve done the flash codes to check them and it has no flash codes. Has anyone had this problem before or anyone have an idea what to do to fix it? Any help is greatly appreciated, i can’t seem to find anyone else on here that’s had this same problem. Also I’ve checked power and grounds on the TCCM plug with pin outs I found online and all of them check out ok. Nothing stands out at all to show why it wouldn’t work. There’s power at the switch in the dash, the back lights come on and light up but no orange lights on selector part to show it’s in 2 hi or 4 hi or anything.
I have a 98 ex cab Z71 5.7 with auto trans and NP1 - 243 transfer case. 4x4 has worked great for years and one day I went to lock it in and the TCCM under the dash started clicking rapidly and wouldn’t stop until I unhooked the battery. And after that it hasn’t worked at all since. I’ve changed every part there is to change. Front diff actuator, encoder motor, 4x4 switch on top of the T case, speed sensor, 4x4 push button switch on the dash, TCCM and neutral safety-range selector switch on side of trans. I’ve checked all of the fuses and wiring under the truck and under the hood and it’s all good. No bare places, no visibly messed up plugs, it’s all good. When I turn on the key the buttons on the dash light up and go back off and then nothing is lit up, nothing happens when I push the buttons. I’ve done the flash codes to check them and it has no flash codes. Has anyone had this problem before or anyone have an idea what to do to fix it? Any help is greatly appreciated, i can’t seem to find anyone else on here that’s had this same problem. Also I’ve checked power and grounds on the TCCM plug with pin outs I found online and all of them check out ok. Nothing stands out at all to show why it wouldn’t work. There’s power at the switch in the dash, the back lights come on and light up but no orange lights on selector part to show it’s in 2 hi or 4 hi or anything.
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