Quote:
Originally Posted by kev2809
I bought this years ago but haven't installed it yet. does it only upgrade the light output with stock wiring? I rewired my truck with an EZ wiring harness, so I'm thinking it might not be needed anymore
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With an old or new vehicle wiring harness, a Headlight Relay Harness is beneficial.
Headlight Relay Harness takes the full VDC load away from the light switch. The light switch then just has to trigger a relay with the voltage draw for headlights from the AUX bus near battery. All lights as a result are brighter.
If your "EZ Wiring" harness also included headlight relays than you would not need the separate relay harness