Actually I have experienced this problem, as I bet have a lot of other people. An AC uses a large amount of electrical current. Whenever it switches on it causes a temporary power drain and lights will often dim or flicker. My neighbor is a retired electrician from Boeing Aircraft. He said it wasn't dangerous ,and the easiest and cheapest way to eliminate the problem was to limit the use of other electrical appliances. Like running the dishwasher late at night, when the tv(s) were off. Or the washer and dryer separately. Turn off all lights that weren't needed, etc. To prevent your lights from dimming you should have your AC unit on a separate circuit run directly from the main panel. The lights are flickering or dimming because the AC unit draws a lot of current when it starts up causing the voltage to drop on that circuit. Lights are sensitive to voltage fluctuations. Contact a HVAC professional and ask about installing a "hard start kit" on your AC compressor unit to prevent it from drawing the extra power from the house on startup. Some models already have built in supression circuitry and some don't. Yours probably doesn't.
The alternator is on its way out.
Might be a weak battery
bad or failing alternator
On my Lexus I had an issue with the lights staying off when it was cold. This was the case for all of my dashboard lights. Then they would flicker back on. There are Caps on the board for the instrument panel that were blown. This was the case for my fuel cage that didn't work consistently work as well
If all of the lights flicker I would check for a loose or corroded ground. If only 1 light flickers then check to see if the bulb is properly plugged in to its socket, or if there is dirt, corrosion or rust causing a poor connection.
Most probably, a loose wiring connection.
Had that problem when still under warranty on my 02 when all lights would momentarily flicker, including the head lights, and the dealer replaced my alternator. There was a service bulletin put out on that problem. Also just recently, my lights would dim and I found a broken ground wire on the left front side on my engine block after checking all ground connections. Good luck.
bad wire connections inside the fan
On a 1999 GEO Tracker, a bad fuse can cause the headlights and dash lights to blink. A bad voltage regulator or alternator can also cause lights to blink and flicker.
check the dash board ground connection...it may be loose
Not enough power to starter, jump it and then ensure alternator is good. Also check battery condition.
Check the alternator output, you may have a failed voltage regulator or bad brushes in the alternator resulting in an oscillating voltage value. This assumes that the flicker is relalted to engine rpms.
EzrvvesnMost likely it's a loose wire or bad ground of the bulb socket. its the hand brake swithch
I would say 1 of your door switches are bad or your door doesn close all the way.
Your entire automobile electrical system is grounded to the frame of the vehicle. A loose or corroded ground wire can cause the dash lights to Flickr and the car to stall out.
Check the oil sending unit.
The fuse is blown. They put the dash lights and tail lights on the same fuse so that if you are driving at night the absence of the dash lights will be made relevent to you in order to get your tail lights fixed.
I would also like to know this. Our van's healights and dash lights both flicker. The headlights are not very bright.
Sometimes when cornering, the overhead lights will flicker on in that model car. This is due to a flaw in the switch mechanism design, which holds the relay connection slightly apart from the bulb (when they touch the light is energized and turns on). When the car turns the centrifugal force will bring these two points together and the light turns on. To fix this, remove the plastic dome and switch cover and look for a tightening screw. If there is not a screw, you may be out of luck. If there is, tightening it should prevent this random flicker.
IT MEANS YOU SHOULD NOT PAY the bill or Call the BBB to report THEM. IF the car was REALLY fixed - The Lights would NOT be ON.The Lights are there 4 a REASON+BUTT+I would have manual GUAGES if it was I-I would have 2 see the Manual Guage READINGS 2 believe the people-Manual is always better than LIGHTS.
I had the same problem. It was my alternator. Be careful, mine died on the way home.
I Had the same problem. Found answer here:http://www.2carpros.com/topics/airbag.htm Basically, it is the voltage regulator causing a voltage spike and blowing the lights and causing an airbag issue. I haven't yet fixed the problem but seems to make sense with the symptoms I had (bright flicker before lights went out).
Make sure you have a good earth ground between the body of the car, the engine block and the battery.
Our 1993 Ford would not randomly (or so we thought) shift into overdrive. We eventually figured out this happened when the headlights / parking lights were on. We then traced it to a bad ground in the parking lights circuit. We fixed the ground and the shifting issue was fixed. No joke.
Fuse connections. The connectors for the dome light in the fuse panel get loose, you can try and bend them back with a small screwdriver to make the connection again.