High Beam Relay Fuse

The difference is that some vehicles have a separate relay just for the high beams and the high beam passing or dimmer switch may or may not be integrated into the headlight switch.

High beam relay fuse.

Check your owner s manual to be sure which kind of high beam bulb you need and get familiar with the fuse box in case the high beams stop working. If relay is the location having problem by bypassing those lines with externally set relay should bypass problem. I look in the manual to figure out which fuse and or relay to replace and can t find a single word about a high beam. Mb 24 also powers the headlight relays so if the there was power at the high beam fuses that means the high beam headlight relay is working and that in turn means connection mb 24 is getting power from the biu.

However as i said in the begining i m not a big fan of installing unnecessary relays or fuses so i consider how much of this relay package is not really needed. Im wanting my light bar to come on with the high beams but dont want to tap into the wires at the headlights if i dont have to. J 03 pin m o g is for rh high beam j 03 pin o o b is for lh high beam. J 01 pin am also split for 12v feed input for relay 30 87 split into rh and lh high beam feed lines.

I have the relays and everything to make it happen but not sure on which fuse if there is one. The relay is controlled by the biu. Each rh and lh line need 10a inline fuse. Power for the relay electromagnet coil is from connection mb 24 which comes from the biu page 1.

Fixing your high beam headlights. In most cases the failure of high or low beams is due to a relay or switch problem and the troubleshooting procedure is similar to the one outlined above. Headlight bulbs are available in every auto parts store so it should be easy to find what you need. The headlight high and low beam circuits do have larger wiring as factory original issue so those two relays are not really needed as long as you do not exceed 60 watt bulbs.