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Year Make Model | Painless Performance
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H-4 Headlight Relay Conversion Harness P/N 30815

H-4 Headlight Relay Conversion Harness By Painless Performance

H-4 Headlight Relay Conversion Harness By Painless Performance


  • Application
  • Specs

Part Number: 30815


Designed for H-4 halogens headlights to get maximum power from your headlights, it is recommended to have the shortest possible distance between the power source and the bulbs. Our headlight harness draws power directly from the battery, through a relay, to the headlights, providing full power to your H4 conversion headlights or halogen sealed beams. It can also be used to relocate head lamps to a remote location.

This kit includes:

  1. Two 40 Amp weatherproof relays
  2. Two weatherproof relay bases with wiring harness
  3. Weatherproof 30 Amp fuse (capable of handling up to 150 Watts)
  4. Mating connectors to factory headlights and harness



WarningProp 65 Warning
Hazardous Material Warning

WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit


#30816 - For 9004 and 9007 halogen bulbs

#30817- For 9005 and 9006 halogen bulbs