@stan2004 posted:
As I re-read what you have posted, and looking at the MTH photo, I am almost certain there are tiny resistors at each LED. Two observations for my reasoning:
(1) why is that black heat shrink so long...about 3/4"...and space is always a premium in mounting lights in an engine. If it was just the red/blk wires soldered to the LED, then it would not have to be that long. Hence I think there is a resistor under there. And,
(2) there are 2 green and 2 red LEDs in parallel (like you've been saying all along
). if there are no resistors at the LEDs, the red LEDs would steal all the current since they turn on at, say, ~2V whereas the green LEDs turn on at ~3V. Installing resistors at each LED is standard/simplest method to equalize the 2 colors.
But easy for me to sit back drinking coffee telling you to blow up your LED harness followed by an "oops, my bad"
.
So if you have a resistors lying around and want to play it really safe... then insert 1 resistor in-series between your 6V DC power and the molex connector on the harness. You might have, say, 470 Ohm lying around...or maybe 220 or 1000 (1K) are other common values. I believe if you do this, the LEDs will all be quite dim.
Or, if you'd have to go out and purchase quantity 1 resistor for this experiment, I'd simply dial down the regulator module to as low as it will go (should be maybe 3V) and then briefly touch the 3V to the harness. I believe the LEDs will be VERY dim. Then slowly work up the voltage toward 6V. If touching 3V to the harness for a fraction of a second causes the LEDs to flash brilliantly, then we need to re-group.
Thank you for all of your time that you are spending with me on this. This forum is great!
I guess the easiest thing to do will be to delicately remove the heat shrink near the LEDS and find out what is under there. I will keep you posted, thanks.
