Problem w/PWM and multi-color LEDs on vehicle
Any PWM/LED savvy tech:
I am attempting to use a 12VDC LED PWM to drive (4) 3-light [2-red, 2-amber] and (2) 16-light 1-red, 1-amber] LEDs from my vehicle's existing, non-LED, non-PWM, parking light circuit.
At first, I had success using a PWM to dim the LEDs to, at, or below OEM parking lamp intensity with no problems; however, after a few weeks of use the PWM started to act as if there was no GROUND connection and the LEDs returned to full intensity with the PWM having no affect, on or off.
My vehicle parking lights operate on a standard 12VDC, 20AMP fused, ~2AMP max.
circuit. I have checked all connections and ran straight jumpers to battery (pos. and neg.), with no solution (i.e., same result).
When I switch entire circuit, including existing PWM to a stand-alone 18V DC NiCd-battery, all seem to function correctly.
So my question: Has anyone experienced this or does it seem I am using the
PWM correctly?
Thanks,
The Newbie