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If you want to run the 4 headlight setup, you have to do a little modifying of your harness. The 13.99 get you the 3 prong connectors to use on the inside lights (hi beams). When you install a headlamp conversion that uses the H4 bulbs you can have all 4 lights on at lo and hi beam. To do this you here is what gmc67swb wrote to me about his setup:
THE LOWS, AS YOU PROBABLY KNOW, ARE THE OUTSIDE LIGHTS AND THE HIGHS ARE ALL 4.THE OUTSIDE LIGHTS PLUG RIGHT IN(3 PRONG).ONE PRONG IS FOR GROUND, ONE FOR LOW BEAM AND ONE FOR HIGH BEAM. THE INSIDE ARE 2 PRONG(ONE GROUND AND ONE HIGH BEAM) AND REQUIRE TRIMMING OFF THE TOP FOR THE 3RD PRONG TO FIT OVER(THIS LEAVES IT EXPOSED, BUT I HAVEN'T HAD ANY PROBLEMS YET-1 YEAR AND COUNTING). IF YOU WANTED YOU COULD GET THE SAME PLUG AS THE LOW BEAMS AND COVER THE 3RD PRONG ON THE BULB(NOT USED) OR YOU COULD WIRE THEM TO HAVE 4 LIGHTS ON IN LOW BEAM (JUMPING FROM THE LOW BEAM WIRE TO THE TOP PRONG ON THE BULB)AND 4 IN HIGH BEAM.
With the new 3 prong connectors, you can easily jump from the other low beam wire. Then connect the original high beam wire to the new connector as well.
Do not perform the mod with out using relays. Your headlight switch will not be able to handle all 4 lights at one time.
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