Flickering or pulstating Headlights

Electrical and Ignition

  1. superchargeddrt

    superchargeddrt Well-Known Member

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    Might be that at some point they got hot. You say you did all of the mods, did you feed the "I" terminal of your regulator with a relay? Could be a bad ground at the regulator,the regulator itself or bad brushes in the alternator.
     
  2. coalman

    coalman Well-Known Member

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    Yes, did the relay, regulator, and alternator replaced more than once. Going to replace the light switch since I have it opened up. Thank you
     
  3. superchargeddrt

    superchargeddrt Well-Known Member

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    Also check the low/high beam switch. I had one that would cause the lights to intermittently go out. Usually on the darkest unlit road.
     
  4. superchargeddrt

    superchargeddrt Well-Known Member

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    By the way, I hate to ask, but did you put the headlights on a relay as well? That would take all of the load off of the headlight switch and place it on the relays. I did mine myself and it makes the headlights noticeably brighter. You will need a couple of good quality relays and I used 12 gauge wire (less voltage drop). Its also a cheap fix. I would be happy to help but if you're looking for more of a plug and play option Crackedback sells a kit to do this. I think if I remember correctly its around $100.00.
     
  5. coalman

    coalman Well-Known Member

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    Yes, a long time ago. Thank you
     
  6. coalman

    coalman Well-Known Member

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    Cleaned out all the connections in the headlight plug, installed new switch, and grounded switch housing tab to body, nothing changed. I just can't figure it out. Thanks
     
  7. RedFish

    RedFish Well-Known Member

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    I recall 2 examples where the issue was the very last piece that one might suspect.... Ground cable from engine block to battery. Most notable story was the 68 Nova that belonged to electrician. No need to type all that here.
     
  8. coalman

    coalman Well-Known Member

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    Last edited: May 10, 2019
  9. coalman

    coalman Well-Known Member

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    New chapter to my electrical soap opera. When I first purchased the car it had a plug in the coolant temp sending unit hole, I purchased a new sending unit it never worked. Took the car out today the first time after replacing the light switch, bingo the temp gauge started working, dah???
     
  10. coalman

    coalman Well-Known Member

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    Can my after market street fire ignition 5520 cause the voltage jumping around and how about the fuse panel doesn't the welded splice power it? Thanks
     
  11. RedFish

    RedFish Well-Known Member

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    There is one branch from welded splice that supplies a portion of the fuse box, brake lights, cig' lighter, dome lamp, everything hot at all times. Another branch from weld splice goes to ignition switch. A line out front that switch goes to another portion of fuse box. Supplies everything hot in run, wipers, turn signals, radio.
     
  12. coalman

    coalman Well-Known Member

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    Ok, thanks a bunch!
     
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