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The 2003 Chevy Impala headlamp relay can be found in the fuse box on the left side of the instrument panel. If your headlamps are not working, you may need to replace the relay, which typically costs between $20 to $25. Another possible issue could be a voltage problem within the circuit, where the relay may be functioning, but there is no power reaching it due to a lack of voltage. Additionally, there are individual fuses for the low and high headlamps located in the upper box on the passenger side of the engine compartment. These fuses are part of the headlamp ground circuit, with the high beam controlled by a dimmer switch and the low beam activated through the main headlamp relay.
The low beam headlight is not functioning properly.
The headlamp relay on a 2003 Chevy Impala is situated beneath the primary fuse box in the engine bay.