I am working with Josh from Delta. He is sending me switches to test. My Fluke has Diode testing function.
I am willing to bet that the diodes are manufactured with the polarity reversed. I can't test the blown ones I have.
I checked current flow through the switch and it is only 180 mili-amps and switch is rated for 16 Amps.
I found new replacement switches today at Local store available in both red and blue LED. Made by http://www.pilotautomotive.com.
Pilot Automotive part number for exact demension of the Delta OEM switches are PL-SW15R (red) & PL-SW15B (blue). They are rated for 10amps, diodes test with correct polarity and the switches and LEDs work perfect with Light Bar.
Delta may be offering these real soon.
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