iamironman 
Does anyone know what would cause this symptom?:
Start engine... everything is fine, running smooth as silk... sitting still or driving, radio on, turn on head lights OR cruise control (not both at the same time, one or the other) and radio turns completely off for 1-2 seconds, at the same time radio is off all lights dim to almost off too, then turns back on, ... everything is fine. If I turn headlights off then back on or cruise off then back on it doesn't do it again... if I turn the headlights OR cruise off and leave them off for a couple minutes then turn either of them back on it does it again, radio off and all lights dim to almost off for 1-2 seconds. It also happens sometimes if a do a jackrabbit take-off, floor it from standstill, radio off and all lights dim to almost off for 1-2 seconds. This happens whether the headlights OR cruise is on or off... it's like a total power drain for a couple seconds then recovery. Any thoughts?
EDIT: I just tried it with the key in acc or prestart, (engine not running) and it does the same thing. 1-2 second power loss, then everything back to normal, and same as everything described above except of course no engine running.
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