[iowalt]

Recently the low beam HID failed on my 2005LT. The igniter had failed when bench tested. The replacement unit did not start when installed. Turns out there is no power to the low beam circuit (green w/ blue tracer) as the left and right side markers do not light either. I have power thru the #5 fuse and the tail light is on.
High beam works fine and drops out when starting. Strangely the tail light does not go out when cranking.

Any ideas on where to start looking?

Thinking that I may have to pull the tank and have a look in the wiring box.

Thanks,

 

[jzeiler]

I'm stuck as the load shed relay feeds F5 (low beam and tail) as well as F6 (high beam). I would at least follow the wire back from the after market ballast and check where is goes from the original bulb connector to the feed through connector on the headlight assembly. From there it goes to some tie point somewhere. The tail lights should be going out so I suspect that the failed ballast may have drawn excessive current and melted wires together.