Painless Wiring Official Site of Painless Performance, American Made wiring harnesses for your hot rod, street rod, muscle car, off-road and everything in between. Wire it once and wire it right with Painless. Painless Wire Harness - Easy to Install Wiring Products Wiring Made Easy with a Painless Wire Harness. Here are Go Painless Wiring, we believe that wiring your Jeep or classic hot rod should be easy and painless. To that end, we are a proud distributor for Painless Performance Products. They design each Painless wire harness with only the strongest materials and input from expert engineers.