Why would all electric systems flicker in my car?

bricmpt2012

New member
'94 Camaro, V6 auto, 125k. All electrical systems (interior lights, headlamps, pressure gauges, etc.) flicker off and on constantly. Been this way for months and it is really getting on my nerves. Had a shadetree mechanic try to attach a code reader and he couldn't get a reading. Please, no wild guesses.
 
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