Driver Side High Beam Not Working

[Tcoat]

Originally Posted by Icecreamtruk

More necro. I have the same problem. Fuse was out, replaced it, light works for a few minutes then goes off, checked again and fuse out, so something is causing the fuse to burn. I changed the DIM relay, since its cheap and just in case, the same thing. Driver side only as well. I think its the wiring, no other way around it. I havent modded/touched my lights but I track the car pretty hardcore so maybe all of that mouvement got something loose (or me taking off and on the bumper).

Edit: I mesured the resistance on both lights, they both measure the same. I measured the current and voltage on both sides, same measurement. I swapped sides with the bulbs, same result. Its in the cable between the fuse box and the lightbulb, where exactly I dont know.

Check the bumper joints and bracket areas since you may have pinched a wire when replacing the bumper.

[Icecreamtruk]

Originally Posted by Tcoat

Check the bumper joints and bracket areas since you may have pinched a wire when replacing the bumper.

You were ohh so close @Tcoat. I inspected the cables and what I found is that my oil cooler lines had rubbed agaisnt it and peeled the rubber off, so it was making contact and thus shorting the circuit. It was indeed related to the last time I took the bumper off, as I removed the AC condenser (had already removed the compressor) and had to giggle the oil cooler lines a bit to the conderser out without removing the oil cooler or the radiator. Thanks for the pointer, it narrowed down the search.

[wparsons]

Originally Posted by Icecreamtruk

More necro. I have the same problem. Fuse was out, replaced it, light works for a few minutes then goes off, checked again and fuse out, so something is causing the fuse to burn. I changed the DIM relay, since its cheap and just in case, the same thing. Driver side only as well. I think its the wiring, no other way around it. I havent modded/touched my lights but I track the car pretty hardcore so maybe all of that mouvement got something loose (or me taking off and on the bumper).

Edit: I mesured the resistance on both lights, they both measure the same. I measured the current and voltage on both sides, same measurement. I swapped sides with the bulbs, same result. Its in the cable between the fuse box and the lightbulb, where exactly I dont know.

Just for clarity, the issue is vastly different between an FRS (with base headlights) and BRZ. The FRS has separate high beam bulbs, the BRZ just has a flap that raises the cutoff on the projector on the low beam bulb.

The FRS will require a lot more amperage to the high beam circuit than a BRZ will.