truck cap wiring harness toyota tundra | eBay Find great deals on eBay for truck cap wiring harness toyota tundra. Shop with confidence. Skip to main content. 21 product ratings - Truck cap wiring harness for third brake light and 12 volt dome light # C90-907. $9. Buy It Now 30" LED Light Bar w/Wiring For 2014-2018 Toyota Tundra Lower Hidden Bumper Mount. Brand New. $62. Time A.R.E. Z series cap wiring | Toyota Tundra Forum May 08, 2018I hope to revive this thread. I bought a used truck with the ARE z series cap already on. 04 Tundra Double Cab SR5. On my cap there are only 2 wires hanging from the 3rd brake light (red and black). The only info I can find is to tie into the brake light itself, but no details about which wire to use inside the brake light.
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