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Need help troubleshooting low beam failure

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America). P2 platform.
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charliewards
Posts: 2
Joined: 8 August 2011
Year and Model: XC90, 2003
Location: Chicago

Need help troubleshooting low beam failure

Post by charliewards »

I'd appreciate advice on troubleshooting my low beam failure. A week ago the left headlight on my '03 XC90 went out. Thinking it was the bulb, I got a new one but it didn't work. Yesterday, my right headlight went out. My high beams don't work, nor do my DTR's. My fog lights and turn signals work.

The fuses in the hood and dash are fine. In reading similar posts in the forum, it could be a number of things; a bad relay, CEM shunt, ballast or switch. So what's the next step in troubleshooting and how DO I test a relay, CEM or ballast?

Thanks,
Charlie
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charliewards
Posts: 2
Joined: 8 August 2011
Year and Model: XC90, 2003
Location: Chicago

Post by charliewards »

Updating my own post: Google showed me how to test relays, and the wiring diagram on this site showed me which ones to check. That'll be my next plan of attack.
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