9003 Light Bulb Wiring Diagram. The middle connection is the positive wire and there are two connections on either side that that are grounds. Buy partsam h4 hb2 wire wiring harness sockets for 4 x6 7 x6 5 x7 inch 4pcs dot approved 4x6 inch led headlights rectangular replacement h.
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The 9004 has the ground pin on one side and in the middle and other side are the positive pins for high beam and low beam. Mess the sides up when you are wiring up the connections and you will have your low beam high beam inverted. This installation also applies for bixenon h4 h13 and 9007 brought to you by http.
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Buy dual high low beam headlight relay wiring harness h4 with high all star truck parts 2 headlight h4 headlamp light bulb ceramic. H4 9003 or hb2 bulb. The grounds determine which way the electricity will flow. The middle connection is the positive wire and there are two connections on either side that that are grounds.
