So long story short I had some LED's in my HVAC for a year now and about 4 weeks ago it's been starting to flicker like a florescent tube on it's way out... Now driving tonight I noticed the left side of my gauge is doing the same.
I wonder if it has something to do with my alternator? I had an issue when driving to VA where the output lead was starting to short to the body of the Alt (1 strand of it) and the car went wild when moving slowly forward.
From my understanding a LED will flicker when A/C is mixed in with the DC voltage? -- It's NOT Ni-kon It's NE-KON!
I wonder if it has something to do with my alternator?
When you give it gas does the flickering change frequency? Do they flicker when the car engine is off and ONLY the battery is supplying power? If yes & no there is a problem with the charging system (probably the alternator or related subsystems like the rectification components).
Use a VOM on the AC setting and check voltage at the battery and somewhere convenient like an accessory power port, it should read 0v. If you are able to detect AC then one (or more) of the diodes are likely leaking or there is something else wrong with the alternator. If the alternator output did suffer a short would expect that something in it was damaged.
I might be mistaken, but those are not LEDs, they are light bulbs. But in any case, I think you just have an intermittent bulb connection, that's all.
I have a couple of lamps in the cluster display turning off on me, and a flick of the finger brings them back. The only remedy is to replace them. Apparently there is some oxidation on the bulb base or on the bulb socket contacts or both. Maybe the same is true in your case. Contact cleaner might work, if you don't want to replace them. I'm just going to replace mine someday.
WELL....since these are replacements for an incandescent bulb, I suspect they have some kind of current regulator in them. Perhaps the regulator can't deal with an automotive electrical system and the flickering you see is caused by the regulator as it drives the bulb. -- One man's Magic is another man's Engineering.
funny when you turn the brightness down on the dash with the car running it stops blinking but I did get it to blink on Sunday with the dash turned down all the way but it's not a continuous flicker as if the brightness was up all the way.
What you can do inow s get an extra LED and grind out some of the plastic to get access to leads going to the LED (after the regulator) hook it up the whole thing to your cigarette lighter, and connect your scope to the leads going to the LED. -- Palin 2012!
What you can do inow s get an extra LED and grind out some of the plastic to get access to leads going to the LED (after the regulator) hook it up the whole thing to your cigarette lighter, and connect your scope to the leads going to the LED.
Hah I see much lower on ebay but I'd have to buy a replacement LED first or I will have one faded dash if I can remember to do that this weekend I don't think I would have to grind out anything.. I'd have to see if it's all the LED's blinking or the center.. If all I can just check any lead off the LED. -- It's NOT Ni-kon It's NE-KON!
I haven't played with these much, but normally it's the LED that has gone nutz. I don't know but they may have some sort of a PWM circuit integrated into the LED. I know this same type failure is common of stop light replacement LEDs.
Another simple test, similar to Sparkchasers, just swap suspect LEDs with one of the same type elsewhere in the dash. If (WHEN) the problem moves you'll know what to do.
Do the large and small replacements have the same problem? I can see where there could be some mechanical problems causing bad connections. As for the LED, I've seen die fractures that cause dimming but that is usually over time. Bad die bond would be more a cause of what you are seeing, after the normal bad connection stuff is eliminated. -- -- -- "Facts do not cease to exist because they are ignored." - Aldous Huxley
Children will not remember you for the material things you provided but for the feeling that you cherished them. - Richard L. Evans
the other LED's for the gauge are fine just that one is blinking so far..
the LED's for the HVAC one is blinking for the fan dial speed and the other one for the mode section well that one has been out for at least 3 months now.. it just went poof.. same as how the other LED's starting blinking and one day while driving it never came on any more..