LED lights are gonna drive me to the looney bin!
I have converted all the exterior lights and the instrument cluster lights on the wife’s 66 to LED’s. I had some weirdness with the taillights that I traced to bad grounding, which was fixed, so they work fine now. But I have been troubleshooting the front turn signals for two days now and can’t figure it out!
Here is what is going on... when I click the turn signal left or right both front turn signals blink, the commanded light blinks bright and the other side blinks dimly. Now when I turn the headlights on (past the parking light detent) and click the turn signal left or right, the commanded turn signal blinks from high brightness to low brightness and the other side is on low brightness with a dim flash.
When I take either front LED turn signal bulb out and replace it with an incandescent, it fixes nearly all the problems (still have a slight dim illumination on LED bulb with headlights on and blinker on). And with the front LED’s installed, headlights or parking lights on, when I click the turn signal the dash signal indicator will stay lit with a very minor change in brightness as the flasher clicks along.
I have installed a three wire flasher. I found an issue with a previous set of LED bulbs where an internal resistor burnt up, so I replaced the bulbs and still no go. I even went as far as unsoldering the bulbs to make sure they had a diode installed to prevent backfeed, and they do. I am trying to avoid installing ballast resistors as that seems like a bandaid to me, a hot inefficient bandaid. I also took apart the turn signal switch and activated each contact independently and I get the same results.
Anybody running a full set of LED bulbs successfully without using ballast resistors?