Trans Electrical Issue

[Harvey24]

forgive me I'm new to this and not much of a mechanic. I have a 03 chevy 2500hd base model 250k miles. iv been trying to fix a transmission issue
receiving the fallowing codes
p0763
p0768
p0773
p0841
p0871
p0872
p0708

I changed the internal wiring harness and ignition switch, check TMC connectors, all seems to be in order. I can see that the external wiring harness has been repaired and two new lies have been pulled. any ideas?

 

[Ron Nielson]

Did these DTCs arise after you changed the wiring harness and ignition switch? If nothing else, try it, clear the codes, and see if they come back. Maybe even disconnect both battery negatives for 30 minutes or then reconnect and see if any difference.

 

[Harvey24]

Did these DTCs arise after you changed the wiring harness and ignition switch? If nothing else, try it, clear the codes, and see if they come back. Maybe even disconnect both battery negatives for 30 minutes or then reconnect and see if any difference.

was dealing with similar Codes Before changing harness and ignitions switch, original cods were p0763 p0768 p0841 p0871. original harness was gummed up and dirty
I will try battery disconnect and let you know tomorrow, thank you responding

 

[2004LB7]

View attachment 115686

 

[2004LB7]

I think you need to repair the harness first. Then clear the codes and see if any come back

 

[Harvey24]

View attachment 115687

I think you need to repair the harness first. Then clear the codes and see if any come back

Ill give that a shot and let you know how it goes. thank you Jason.

 

[Harvey24]

was dealing with similar Codes Before changing harness and ignitions switch, original cods were p0763 p0768 p0841 p0871. original harness was gummed up and dirty
I will try battery disconnect and let you know tomorrow, thank you respond

View attachment 115687

I think you need to repair the harness first. Then clear the codes and see if any come back

Well turns out with a little more digging I found the problem. thanks for the Help I really appreciate it.

 

[2004LB7]

That will do it. Was it rubbing on the power steering/belt?

 

[Harvey24]

yes sir it was rubbing on the power steering housing. I did go ahead and rewire that pig tail for the transmission. I appreciate you taken the time to help

 

[2004LB7]

No problem. Those heat shrink solder connectors would be perfect for that repair

 

[Harvey24]

that's exactly what I used seems to have done the trick