Labparamour
Senior Member
‘03 Freightliner Columbia, DD 12.7 series 60.
“Low” braking works in low and high (same braking effect/sound).
Nothing from other cylinders in “med” or “high.”
Switch meters okay.
Next want to check wiring from switch to ECM.
Wiring has butt splices where goes to ECM plug.
How is electrical connector fastened to ECM?
Do I have to remove ECM from block?
(Not sure if even issue on this engine but, I read Truckshops info to CraneOp re: oil pressure dropping out if galley plugs loose/missing.
No change in oil pressure.)
Thank you,
Darryl
“Low” braking works in low and high (same braking effect/sound).
Nothing from other cylinders in “med” or “high.”
Switch meters okay.
Next want to check wiring from switch to ECM.
Wiring has butt splices where goes to ECM plug.
How is electrical connector fastened to ECM?
Do I have to remove ECM from block?
(Not sure if even issue on this engine but, I read Truckshops info to CraneOp re: oil pressure dropping out if galley plugs loose/missing.
No change in oil pressure.)
Thank you,
Darryl