I know with the original ECM programming the cruise control is set to stop working whenever a CEL is present.

The GDE tune does not have this restriction IIRC.

got good ground but there is a white with red strip wire theres two of these one powers the lights with the headlights on. The one red stripe/ white wire thas no power at all im trying to figure out where these wires go I know that there going into the backside of the fuse box, and they have power at the box but not at the bottom brake light at all. I think that maybe there is a break but boy were they go inside the back passenger fender is hard to get to without tearing apart the whole thing, but maybe a mouse has chewed one of these wires I have heard if the brakes lights aren't working the cruise wont work either. I have a feeling this is were my problem is if not then its the ecu but im hoping for a wire. If there are any ideas of where these wire might travel it would be greatly appreciated with any help

thank you

The "cruise" light, bottom left of the odometer window, does not come on with most all the other lights when the ignition is turned on. However, if you invoke the instrument cluster test by holding the odometer reset button down while switching the ignition on but not starting the engine the "cruise" light will illuminate as part of that test. Assuming it does light up there is a good chance the cruise is not "turned on" in the ECU flash. On the CRD IIRC the cruise is totally electronic and it's not unheard of for a dealer to forget to turn in on when an ECU is updated.

That said if you don't have a GDE tune you should and I believe Keith can turn the cruise on at the same time at no added charge.

I'm assuming your odometer and such do work? I ask because a bad wheel speed sensor can kill cruise but it usually kills other things as well.