Quote:
Originally Posted by easyrider
The orange wire is not grounded for some reason., so would it hurt if I ran a ground wire to this wire?
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If you don't have a detailed wiring diagram for your truck, go to the ELECTRICAL FORUM on this site and download the wiring diagram for your truck..
The following is a very detailed and highly simplified description of how the dome light circuit works.
If your new harness is color coded correctly and matches the original color code, the orange wire comes from a fuse in the fuse box. It's always hot, and probably branches off and provides feed voltage for more than one circuit, but it provides 12V on one of the terminals on the dome light.. DO NOT GROUND THIS WIRE!! Fuses will blow.. The other terminal on the dome light should have a white wire connected to it IF the harness follows the original color coding. This is the wire that goes to a grounding switch, thus the term "switched to ground"... One of the switches used for this purpose is the headlight switch.. When the headlight switch knob is twisted CCW to the stop, the ground side is completed and the dome light comes on.. On some models (not all) of our trucks, push button grounding switches are installed in the A pillar between the hinges.. The white wire is connected to these switches and when a door is opened, the switch connects to ground and the dome light comes on....