.....under the driver's side headlight.
Symptoms
1) No Headlights.
2) No Fog lamps.
3) No Horn I had to drive home at night with only parking lights.
4) Transmission shifted strange lots of torque converter slip and tach was at 2400 RPM at 50MPH.
5) Engine lost a lot of its' response and was doggy.
Acted like a bad BCM, but electrical problems can be like some Politicians, they lie to you.
A fellow CRD owner pointed out some problems with '06 CRDs.
1) Bad ground on upper driver's side fire wall. Mine was OK.
2) Messed up wiring harness where it goes behind the fuel filter mounting bracket. mine was OK.
3) Bad ground under the driver's headlight. That was the problem.
I could not get the nut off the grounding stud under the headlight so, I broke the eyelets off and ran the grounds up to the battery.
I painted on liquid electrical tape onto the butt crimp connectors to seal them up.
Problems solved