No gear designator, reverse lights or speedo

[Khelm94]

Occurred out of the blew. Won’t upshift or downshift from third. Reverse does work as well as 4WD. No codes on the dash either. Any ideas?

[Mike L.]

What do you have? Need to scan it with a professional scanner.

[Khelm94]

Originally Posted by Mike L.

What do you have? Need to scan it with a professional scanner.

05 2500 hd. Got a new NSBU because I was thinking it sounded like that was my problem.

[THEFERMANATOR]

Sounds like you're in limp mode with no info coming out of the TCM. Check your fuses 1st then check to see if you have power/grounds to the TCM.

[Mike L.]

Originally Posted by THEFERMANATOR

Sounds like you're in limp mode with no info coming out of the TCM. Check your fuses 1st then check to see if you have power/grounds to the TCM.

I would throw a code.

[Khelm94]

What specific fuses should I be checking? I’ve read so much about ignition and NSBU and speed sensor and this and that lol

[Khelm94]

Originally Posted by Mike L.

What do you have? Need to scan it with a professional scanner.

Messing around in interior fuse panel and discovered blown 10a ignition fuse. Put a new one in and she’s back to normal!

[THEFERMANATOR]

Originally Posted by Khelm94

Messing around in interior fuse panel and discovered blown 10a ignition fuse. Put a new one in and she’s back to normal!

I knew 01-02 had the 10 amp trans fuse inside, wasn't sure if it was still there in 03+, or if it had been re-named. But you had all the symptoms of that 10 amp fuse being blown. Check your wiring harness near the power steering pump. There was problems with it rubbing through down there and blowing the TCM fuse.

[Khelm94]

Originally Posted by THEFERMANATOR

I knew 01-02 had the 10 amp trans fuse inside, wasn't sure if it was still there in 03+, or if it had been re-named. But you had all the symptoms of that 10 amp fuse being blown. Check your wiring harness near the power steering pump. There was problems with it rubbing through down there and blowing the TCM fuse.

Would make sense because I just had an idler pulley lock up and blow my serp into 3 pieces on thanksgiving. Wrapped up around fan so maybe that and me tugging on the pieces of belt caused just enough to mess with the wiring harness. Ya got any other ideas? I’m not a professional by any means but I can find my way around pretty easily

[Khelm94]

Originally Posted by THEFERMANATOR

I knew 01-02 had the 10 amp trans fuse inside, wasn't sure if it was still there in 03+, or if it had been re-named. But you had all the symptoms of that 10 amp fuse being blown. Check your wiring harness near the power steering pump. There was problems with it rubbing through down there and blowing the TCM fuse.

Would make sense because I just had an idler pulley lock up and blow my serp into 3 pieces on thanksgiving. Wrapped up around fan so maybe that and me tugging on the pieces of belt caused just enough to mess with the wiring harness. Ya got any other ideas? I’m not a professional by any means but I can find my way around pretty easily