Have a 2002 F150. have the same thing. However I have caused it. I switched the module out of a truck that I totaled into a truck that I was buying that did not have it. I wanted the lites to be on all the time when the truck is running so, I did not put the dash panel peice in that had the slits in it for the photo lite sensing eye. The lights stay on all the time now automatic when starting. The dash and radio lites are hard to see in normal lite. I can change this by turning the lites to the off position with the manuel control switch. The head lite are not on, but the dash lites are brighter. I think the same thing happens with the dimming of the dash lites when the switch is in the mannuel on position. Hope this helps.