bouncing speedo

[Jordi]

2003 2500 5. 9ho auto 4x4 ,bouncing speedo, gauge self test good, changed sensor on rear axle, same thing, only code is p646 ac clutch control circuit low, probably unrelated, any ideas?

 

[LNaugle]

I would check main harness connection for loose or corrosion. not sure if yours is the early bolt together connector or plug in type with separate trans connector...

 

[Jordi]

Do you mean the connector at the module on the engine block?

 

[Jordi]

now the ac compressor has started cycling with the ac and blower motor off. help anyone. ac still works perfect though.

 

[LNaugle]

Main connector at firewall... . what is the build date of your truck?

 

[Jordi]

April 03, checked that it looks clean, I got it to act up wiggling the wires at the 2 connectors on a bracket at the drivers side top of the bellhousing, one came apart and looks good but the othe seems to be fused together. Just got home from work and sprayed it down with wd-40. I'll see what happens in the morning.

 

[LNaugle]

Think you will find your problem there...

 

[Jordi]

Yup, took care of everything, speedo, ac clutch, trans seems to shift firmer too. That part could be in my head. Thanks for the replys.