RmeSGT
Newbie
1993 K1500, 5.7, 4L60e. Burned up trans last year and embarked on “mini resto” from cab forward. Had trans rebuilt, now put back together.
During test drive everything worked great except no power to 4x4 shifter (and won’t engage) AND trans will not shift out of 1st. Here’s what I’ve done:
1) Ran truck on stands, confirmed 4x4 not engaging, won’t shift out of first on stands either. Can shift into L, 2, D, and OD. Wheels move in each gear.
2) Initially speedometer did not work. Now, it works but “bounces” more than normal.
3) Checked connections to trans and transfer case. All seem good.
4) Checked fuses, all seem ok (did not swap them with new).
5) Followed troubleshooting from GM Service Manual. Used test light for transfer case speed sensor, no power from “brown” wire. Next step says to check for open between speed sensor connector and convenience center.
One thing that may be a possible cause is that when I replaced all the grounding straps, there was a connector and approx 3 inches of black ground wire that was between the strap and the firewall. I was never able to find the other end to replace. I figured whatever it grounded would show itself as I moved forward. Given my self-admitted lack of skill with wiring diagrams, it appears to me that ground *may* be for the instrument cluster. Is it possible that somehow the speedo found another way to ground that is barely sufficient and not good enough for the trans?
I am a mechanically inclined person, but am absolutely worthless when I have to use a meter or test light. God forbid I have to use a wiring diagram!
I’m positive this is likely something simple. Can anyone help? Can I buy the entire wire “circuit” and just plug a new one in?
During test drive everything worked great except no power to 4x4 shifter (and won’t engage) AND trans will not shift out of 1st. Here’s what I’ve done:
1) Ran truck on stands, confirmed 4x4 not engaging, won’t shift out of first on stands either. Can shift into L, 2, D, and OD. Wheels move in each gear.
2) Initially speedometer did not work. Now, it works but “bounces” more than normal.
3) Checked connections to trans and transfer case. All seem good.
4) Checked fuses, all seem ok (did not swap them with new).
5) Followed troubleshooting from GM Service Manual. Used test light for transfer case speed sensor, no power from “brown” wire. Next step says to check for open between speed sensor connector and convenience center.
One thing that may be a possible cause is that when I replaced all the grounding straps, there was a connector and approx 3 inches of black ground wire that was between the strap and the firewall. I was never able to find the other end to replace. I figured whatever it grounded would show itself as I moved forward. Given my self-admitted lack of skill with wiring diagrams, it appears to me that ground *may* be for the instrument cluster. Is it possible that somehow the speedo found another way to ground that is barely sufficient and not good enough for the trans?
I am a mechanically inclined person, but am absolutely worthless when I have to use a meter or test light. God forbid I have to use a wiring diagram!
I’m positive this is likely something simple. Can anyone help? Can I buy the entire wire “circuit” and just plug a new one in?
