- Joined Nov 18, 2015
Hello all, amateur electrical hobbyist here. Self taught with a few books from Radio Shack, and slowly learning. I must admit, I'm a little intimidated posting here as I've never been part of any electronics forum before. Anyway, to cut to the chase, I built this automotive parklight dimmer circuit to be used with switchback LEDs. I've done two of them before, and they worked just fine. The only difference with this one is I added a circuit that would cancel DRL's while the turn signal is engaged. That circuit behaves just fine. The problem is I'm getting a backfeeding problem on the turn signal circuit whenever it's opposite is on. BUT, only when the parklights are turned on. Say the left turn signal is on, the right side will flash a little bit brighter, but not full brightness, and vice-versa when the right turn signal is on. Attached is my quick sketch of the wiring diagram. The dimmer module sends out a PWM 12V to the parklights, and the turn signal voltage sends out a constant 12V that makes the respective LED turn on to full brightness. Any and all help is appreciated. Thanks for your time!
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