Vehicle: 2007 Saab 9-5 (9600) L4-2.3L Turbo
Problem: The low-beam headlights worked fine but
the high-beams did not work. The fuses were good. It appears the
light switch was working because, when using the fog lights, they
go out when turning on the high-beams.
Details: The main relay was providing power to
the circuit but there was no power to the fuses for the
high-beams. Using the OEM wiring diagram, the tech traced the
problem to a headlamp filament (or bulb-check) monitor between
the relay and the fuses. When tapping on the unit, the high-beam
headlights operated. NOTE: The unit looked like
a relay and was orange in color.
Confirmed Repair: Replaced the headlight
filament monitor; high-beams operated normally.