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It could be caused by either a dimmer switch or a large load energizing while it is on (for example a clothes iron).
All dimmer switches hum. The older they get, the louder the hum. If you have compact florescent bulbs in the fixture, this will cause the switch to hum louder.
Metal Halide can flicker when warming up cause it is starting to get hot inside. Or Metal Halide can flicker when it is about to burn out. Sometimes they even cycle.
Yes a bad circuit breaker and a bad light switch can cause a light to flicker when its turned on. It could also be caused by loose wiring going or coming from that paticular circuit. it also could be something in the fixture itself causing. Checking for loose connections is your cheapest and first route to go.
Yes, it could.
Change your dimmer switch, it went out.the dimmer switch will allow your lights to work but cause problems with your high beam,also can cause your parking lights to short out. Change it asap
Bad dash light, or dimmer fuse. Or a bad dimmer switch itself
On many cars, there is a dimmer switch which controls the instrument panel lights. If this switch is turned all the way, it may cause the overhead light to come on. The overhead light will then stay on even after doors have all been closed. Find the dimmer switch, close the doors, wait 30 seconds, and then turn the dimmer switch.
Check the dimmer switch on the floor and the electrical connection to it. It may be corroded.
On your light switch there is a dimmer for the dash lights . if you turn it all the way to the left your interior lights should come on , turn it to the left and see if that works otherwise it might be a door switch .
move the dimmer back and forth and turn the parking lights on and off. sometimes the switch gets wierd.
Answer 1 - Instrument Lights Operate IntermittentlyWithout doing a "hands on troubleshooting" of your vehicle, no one here can be certain of the specific location and cause of your problem. However, based on your question, I suspect that the cause is a loose connection in the circuit providing power to the instrument lights, or on the instrument panel circuit board itself.It is possible also, that the instrument panel dimmer switch is wearing out.Answer 2 -The dash dimmer switch or the headlight switch is the most likely problem.
Check fuses? Could be a bad headlight switch/ Could be an open in dimmer rheostat?
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Usally not. The only link I see is that these are usually on the same fuse. Ohm check the fuse. Also check that the dimmer switch just isn't disconnected or turned off\down. -edit- Possibly - I installed an aftermarket stereo on my Subaru Loyale (1990) and had the same symptoms you described. After troubleshooting for months, I discovered that during the stereo installation I fried the actual dimmer switch. When I replaced that, everything came back online. If the fuses check out, try replacing the actual dimmer switch. You can check this by bypassing the dimmer switch - the dash lights should come on full-power if this is the cause (connect the wire going into the switch to the wire going out of the switch).
It could be caused by either a dimmer switch or a large load energizing while it is on (for example a clothes iron).