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Discussion Starter #1
So I just barely bought a 2005 manual Ford Focus, ZX4. It's been great for the past week until today. When taking a left turn in 1st gear, the RPMs shot up to about 5,000, and the car electronics turned off for a few and then back on. The engine was still running, I could still steer normally, but the RPM indicator didn't work anymore. I thought giving it a rest might help, so I pulled over, opened the hood, and everything seemed okay. I got back in, and the next turn I took, the electronics freaked out again. Everything else kept working except the RPM indicator, so I got onto the freeway to get home. The RPM indicator worked just fine, and everything seemed back to normal. Except now the headlights will not turn on. The small orange bulbs turn on, the fog lights turn on, the turn signals work just fine, its just the low beams that have stopped working.

I don't know what to do. Can the bulbs have been shorted? Do I just need new bulbs, or new fuses, or something entirely different?
 

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you can test the bulbs with a multimeter (check resistance) or by plugging them into a battery directly

the fuse can be checked with a multimeter (check resistance) or by turning lights on and seeing if voltage is on the output side (they usually have probing points on the top for input/output)

you can buy the cheapest $10 multimeter from harbor freight for these checks, you don't need precision
 

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Yeah, the hi beams work. They look like they share the same chassy.
05-07 uses 9007 bulb which is a dual filament bulb (lo/hi). Its posible the lo beam filament is out on both bulbs. Another possibility is that the lo beam relay has failed. For it to be a fuse issue you would have to have blown two fuses as each bulb filament uses a separate fuse.

Paul
 

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Discussion Starter #6
you can test the bulbs with a multimeter (check resistance) or by plugging them into a battery directly

the fuse can be checked with a multimeter (check resistance) or by turning lights on and seeing if voltage is on the output side (they usually have probing points on the top for input/output)

you can buy the cheapest $10 multimeter from harbor freight for these checks, you don't need precision

IT WORKED! I got a new pair of headlights, and so far everything is working today. Thank you!

Now to make sure that this weird thing never happens again... :)
 

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Discussion Starter #7
05-07 uses 9007 bulb which is a dual filament bulb (lo/hi). Its posible the lo beam filament is out on both bulbs. Another possibility is that the lo beam relay has failed. For it to be a fuse issue you would have to have blown two fuses as each bulb filament uses a separate fuse.

Paul
Yeah, I took out the bulbs, and one of the filimants on each were broken.

They were replaced, and everything works now!
 
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