Hello everyone. I have a 94 Lightning and I have a error code 67. The reason I noticed that the overdrive off light was on was because I put the truck in drive and it started in third and I had to shift it into second to get going. It seems I only have second and third. I replaced the neutral safety switch and it worked fine for about 30 minutes and then the overdrive light came back on. What could be the root problem other than the switch. Any help would be greatly appreciated.

 

If you replaced the MLPS, adjusted it correctly, and it still does it, there's probably a problem elsewhere in that circuit. Time to get a wiring diagram.

 

[QUOTE=glc;5151019]If you replaced the MLPS, adjusted it correctly, and it still does it, there's probably a problem elsewhere in that circuit. Time to get a wiring diagram.[/QUOTE

 

Thanks. I'm thinking it might be in the wiring harness. Have to test the voltage next.