Amazon: toyota headlight 1Set 2 Headlight Harness H4 Headlight Relay Harness H6054 H4 Relay Harness Toyota Pickup Headlights H4 Wiring Harness Headlight Relay Kit For Toyota 95-97 Tacoma 88-95 Pickup Fix Dual Ground Problem. by KASLIGHT. 4.5 out of 5 stars 52. $22 $ 22. 99. Get it as soon as Mon, Mar 18. Toyota negative switched H4 headlight harness with relays May 17, 2011Toyota negative switched H4 headlight harness with relays (If this has been gone over before, sorry for being redundant.) I've e-mailed D. Stern and he said that he doesn't have a schematic of how to wire up a kit for a Toyota and does not have parts available at this time.