H4 (9003-HB2) Relay Wiring HarnessH4 (9003 HB2) Relay Wiring Harness Features 40AMP relay In line safety fuse included Improved easier trigger wire For both driver side and passenger side HB2 adapters (also work for most H4 and 9003 applications) Good for add on fog lights, LED work light, HID conversion kit, daytime running lights, etc See more product details Installation Connect #1 and #2 to battery positive and negative terminals Connect #3 and #4 to any lighting applications
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