I had an electrician over to replace some low-voltage light bulbs that were too high for me to reach, and also a couple for which changing the bulb didn't work. He changed the bulbs and left one with a bad transformer out pending ordering a new transformer. When the electrician left, all lights in the house were on! After I turned them off, I noticed that none of the large Lutron wallplates (containing lots of switches) worked anymore, although the local Lutron switches still worked. The lights wouldn't turn on from the large panels, or else turned on once and then stayed on and wouldn't respond. Any idea what happened? The electrician had not seemed familiar with the Lutron system.

Check the wiring on that light. Also check the bulb with a couple of wires to the battery, or swap the bulb left to right to make sure the new bulb is okay.

Could be a couple of reasons maybe your charging system is to high an output and supplying to much voltage or you are touching the glass of the bulb this leaves an invisible grease from your fingers that causes the bulb to overheat

Most OE factory wiring is marginal as far as amperage carrying capability goes. They installed wiring fine for the stock bulbs and switch. A lot of vehicles send power to the lights..head and running...through the light switch on the dash. This causes it's own problems as switches are the weak link in the lighting system.

If you run 100watt bulbs you will need to power the bulbs via a 40 amp relay switched by the light switch so the switch does not carry the amperage load through it's contacts.

Doing so will reduce the voltage drop to the bulbs as a 2 volt drop will cause the bulbs to be only 75% as bright as they would be with the full 13.5 volt running voltage..

You run a fused wire from the battery or power distribution block to the relay that should be mounted within 6 inches of the closest h/l bulb. Then from the relay to the head light bulb/s. The front and rear running lamps can remain as factory as they are low amperage draw and original light switch will work because you now no longer run power to the h/lamps through the switch.

Search the www for schematics for relay switched lamps.


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Check the amps that are being drawn by the headlights. Compare that with what the bulb should be drawing using:
amps= watts / volts
I am going to guess its higher but not to the point of blowing the fuse for your lights. I would then start checking grounds.
Or, you used halogen bulbs and you touched the glass. I doubt they would both fail at the same time from that.

Check if the lights are powered through a head light relay if so change the wiring around, should fix it .

replace the dimmer switch

Hi, viewer. In my practice, I was able to change the high beam bulbs and signal bulbs by removing the forward portion of the front wheelhouse liner. Lots of patience though. The low beam bulbs and the park lamp bulbs is somewhat difficult to reach, may even require removal of the whole assembly especially if the lowbeam bulb connectors are burned.

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.
Thanks for contacting fixya.com

Headlamp Bulb: Service and Repair
REMOVAL PROCEDURE
1. Make sure the headlamp switch is in the OFF position.
CAUTION: Halogen bulbs contain gas under pressure. Handling a bulb improperly could cause it to shatter into flying glass fragments.
To help avoid personal injury:
- Turn off the lamp switch and allow the bulb to cool before changing the bulb. Leave the lamp switch off until the bulb change is
complete
- Always wear eye protection when changing a halogen bulb.
- Handle the bulb only by its base. Avoid touching the glass.
- Do not drop or scratch the bulb.
- Keep dirt and moisture off the bulb.
- Place the used bulb in the new bulb's carton and dispose of it properly.
- Keep halogen bulbs out of the reach of children
NOTE: Avoid touching the bulb or letting the bulb come in contact with anything damp. Oil from your skin or moisture on the bulb can cause
the bulb to explode when the bulb is turned on. It either comes in contact with the bulb, clean the bulb with alcohol or a suitable degreaser and
wipe the bulb dry.
2. Remove the bulbs from the headlamp capsules by reaching from the engine compartment and by twisting the bulb counterclockwise.
3. Remove the 2 long screws from the top of the radiator support.
4. Pull forward the headlamp assembly (3).
5. Disconnect the electrical connector (2) from the burned out bulb assembly (1).
INSTALLATION PROCEDURE
IMPORTANT:
- Replace a high beam bulb with another high beam bulb. The high beam bulb has a red gasket.
- Replace a low beam bulb with another low beam bulb. The low beam bulb has a gray tip and a yellow gasket at the base.
1. Install the new bulb assembly (1) into the headlamp assembly (3).
Twist clockwise the bulb assembly.
2. Seat the bulb assembly with the connector facing down.
3. Connect the electrical connector (2) to the bulb assembly.
4. Install the headlamp assembly.
5. Install the 2 long screws through the top of the radiator support.
6. Tighten the screws.

Get an electrician to measure voltage where the light is plugged in. It sounds like you have too high a voltage.