justin_o_guy2 wrote on 07/23/08 at 05:10:00:The svc manager at the chevy house told me this about "Fast Blink". There is a Bulb OUt sensor that detects the higher resistance & rapid flashes the thing. He said LEDS are high resistance & create the same.. NOW, Disclaimer time. He is the SAME guy who tried to get me to believe that my car needed a 15 amp fuse replaced with a 25 in order to handle the added current of pulling a trailer, he tried so hard to BS me, but, I didnt buy it & they had to work on it.. NOW, I gotta study that car before I accept it.
I have to disagree on the part about LED's being high resistance bulbs.
LED's inherently have a lower current draw and as such would not have higher resistance.
Now it's possible if the LED's are clustered in an assembly, this assembly may also include shunting resistors to either bring the voltage more in line with the designed operating voltage for the LED or for the purpose of triggering a mechanical flasher. I have not personally seen this on simple LED turn assemblies.
Think of it this way; if your battery were to drop down to 8VDC the incandescent lamp flash would be expected to slow as a result of the reduction in available current. Conversly if your resistance at the lamp assembly drops, more current is available for a given voltage producing a faster triggering of a mechanical flasher. huh what'd I just say.......