Lequarius
Junior Member
- Joined
- Oct 23, 2013
- Posts
- 6
- Reaction score
- 1
- Ram Year
- 2007
- Engine
- Hemi 5.7
Hi Folks,
Having a bunch of problems arising with instruments and sensors. I suspect the wiring harness/loom but can find no diagrams detailing routing and placement.
The brake and abs trouble lights blink on/off on a fairly regular basis, the speedometer loses speed signal and drops to zero then returns, drops, then back to speed. The cruise control indicator light on dash shows system active but does not hold speed and front bank left (1) oxygen sensor regularly indicates a failure but benchtests good.
I suspect a branch of the wiring harness running up from the transmission well has chafed/deteriorated or had oil spilled onto it damaging the wiring insulation, or perhaps a bad connection on a common branch to the firewall? I'm not familiar with the wiring harness enough to be able to determine definitively.
Any trouble shooting tips or suggestions as to how to proceed would be appreciated.
I'm seriously hoping it's not the MCU as that would really suck.
Has anyone with this generation of Ram had this issue?
Thanks Folks
Having a bunch of problems arising with instruments and sensors. I suspect the wiring harness/loom but can find no diagrams detailing routing and placement.
The brake and abs trouble lights blink on/off on a fairly regular basis, the speedometer loses speed signal and drops to zero then returns, drops, then back to speed. The cruise control indicator light on dash shows system active but does not hold speed and front bank left (1) oxygen sensor regularly indicates a failure but benchtests good.
I suspect a branch of the wiring harness running up from the transmission well has chafed/deteriorated or had oil spilled onto it damaging the wiring insulation, or perhaps a bad connection on a common branch to the firewall? I'm not familiar with the wiring harness enough to be able to determine definitively.
Any trouble shooting tips or suggestions as to how to proceed would be appreciated.
I'm seriously hoping it's not the MCU as that would really suck.
Has anyone with this generation of Ram had this issue?
Thanks Folks