Who is using what for a headlight relay kit?? (brighter headlights) H4

Discussion in 'Electrical Systems' started by QUAKE_WARS, Aug 8, 2019.

  1. QUAKE_WARS

    QUAKE_WARS Veteran Member

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    Best brand? Ebay? Classic industries? Dont want a cheap budget kit.
    Quality brand.
     
  2. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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  3. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    Here's the diagram I designed a four-relay system.

    If a relay fails... You can disconnect the factory plug from the relay and plug it directly into the lamp.

    upload_2019-8-8_18-2-38.png

    The single power lead can be hidden in the factory loom running across the radiator support.

    This is what it looked like when assembled.

    upload_2019-8-8_18-4-48.png

    The relays are "velcro"ed to the inside of the fenders near each headlight so the whole package is pretty much invisible.
     
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  4. COPO

    COPO Veteran Member Lifetime Gold Member

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    Last edited: Sep 16, 2019
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  5. Zspoiler

    Zspoiler Veteran Member

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    I just use my stock wiring on both my 1979 Z-28 and 1981 El Camino SS with H-4 headlights
     
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  6. QUAKE_WARS

    QUAKE_WARS Veteran Member

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    The relays make the lights brighter due to full power to the headlight itself. I tried that once with my 70 and did not like the outcome.
     
  7. dave@ztech

    dave@ztech Veteran Member Lifetime Gold Member

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    MAD electric has a kit, you might want to look at
     
  8. junkyardZ28find

    junkyardZ28find Veteran Member

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    That stock headlight switch has a voltage limiting ballast inside of it and it won’t like trying to block even more power when those H4s try to pull it. I would hate to see a dash panel catch fire as a result.
     
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  9. Jeep43

    Jeep43 Veteran Member

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    I bought an ebay harness. I hooked one up and kept the old wiring to the other light. I didn't see a difference.
     
  10. COPO

    COPO Veteran Member Lifetime Gold Member

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    You need to connect them both for it to properly work.
     

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