Inside the switch.
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next to battery ,black cover with relays inside it
The only headlight relay I can find is for the Clio II from 1998 onwards This is in the fascia relay box, relay no8 This controls the low beam with the daylight running lamps.
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Most likely the vehicle has separate low-beam and high-beam headlight bulbs and you simply have one low-beam bulb that is burnt out.
There are two headlight relays, high beam (C1005),low beam (C1006).There are four headlight fuses,Left low beam (F16) 10 amp,Right low beam (F17) 10 amp,Left high beam (F26) 10 amp,Right high beam (F27) 10 amp.
Under hood fuse panel, should be #35 relay, operates low beam headlights
I looked in the Honda technical manual wiring diagrams and I don't think there is a separate relay for the low beam headlights. The headlight switch itself is located right above the steering column where the headlight stalk is attached - controls parking lights, high beams and low beams. It could be that a relay is integrated within this switch, so if you're having problems with your low beams turning on, you'll have to replace this switch.
Begin by removing the wiring harness from the back of your 1989 Silverado headlight assembly. Remove the low beam headlight assembly retaining bolts. Reverse the process to install your new low beam headlight.
There is no fuse that is just for low beam. There is however a headlight fuse. Look in your owner's manual for the location.
9006x for the low beam and 9005x for the high beam.