I have a 91 gmc 1500 when I turn on the headlights the tail and dash lights will not turn on... After about 30 min I can turn off headlights and wait a min, when I turn them back on and wiggle the switch all of the lights work. Do I need to replace switch or could it be the switch connector? And what about the dimmer knob, it is the type you roll up/down I've notices that when u try to roll it, it will push in and out not just up/down, can that be replaced also?
Not quite sure what you mean about the dimmer switch, but a general rule of thumb; if you jiggle a switch and stuff goes on or off -- the switch is bad. Shouldn't be having an effect on the connector.