Question about 1988 Buick Century

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Low beam headlight will not come on

Blubs have been replaced, fuses checked. Highbeam headlights work.

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Hi,
With the low beam switched on, see if you're getting power at the wire connection to the bulbs. If so, there may be a bulb grounding issue. If not, there may be a light dimmer switch issue. Just a quick observation but I hope it helps.
Good luck!

Posted on Jul 08, 2010

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1 Answer

What would cause camry 2003 low beams to both go out at the same time?


Check the HEAD LEFT LWR FUSE (15A) and the HEAD RIGHT LWR FUSE (15A).
These fuses control the headlights when they are on LOW. Though its rare for both fuses to blow at the same time, I need you to verify that they are working.
There could be a blown blub on one side and a blown fuse on another side (still unlikely).

If the above procedure does not reveal the problem try this:

With the headlights ON, check for power on the #2 RED wire on the left headlight connector to the low beams. Check for ground on the WHT/BLK wire on that connector.

Check for power on the #2 RED/GRN wire on the right headlight connector to the low beam. Check for ground on the WHT/BLK wire on that connector.

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Hi,
It has been because the lamp bulb or halogen lamp module has reached the end of its serviceable life, not because of any wiring problems. Low beam burns out first because it is on the most. If low beam is lost simultaneously in both headlights, I would check fuse first, then the headlight switch. If low beam is lost on one side only, it is almost always going to be due to the bulb or lamp module needing to be replaced. In that case, replace them in both headlights because the other one will be going kaput in short order, as well.
Most like the low beam filiment is bad but the high beam filiment is still good, try replacing bulb. If replacing bulb does not fix problem then you probably have voltage problems and should check the voltage reading and the plug.
OR
isolate the wire that comes from the headlight switch to the headlamp bulbs for low beam and check to see if there is a short in the wire. You can find this wire by using a test light turn on the key and get a good ground with the test light poke the wire and see if the test light illunimates with the headlight switch on.
check the wires, and check the fuse for your lowbeams. could of blown a fuse on your lows, but your highs will still work.

The fuse box is located in the engine compartment,on the driver's side. Has thumb-screw retained cover.
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