Hello, I have an 89' fj62. Recently the drivers side low beam does not operate. The high beams all come on when switched on, but I cannot figure out the problem. There is an aftermarket wire harness installed. The bulb does not appear to be burned out, and when I switched the bulb from the other side it still had the same problem. There are 12v coming to the headlight. I took the switch off at the steering wheel hoping for bad ground but the contacts were very clean. I assume a bad ground there would cause both low beams not to operate anyway. It's strange because the new harness connects to the connection that plugs into the faulty headlight, and then travels to the other headlights and new fuse/relay box (which is wired directly to the battery). Can anyone offer advice. Thanks!