Ok Having issues with the lamps installed. If i check for polarity at the light ground(LGND) and at +B on the board with my multimeter, I can get all of the lamps to light up. Plug it into the radio, flip on the headlights and the display doesn't illuminate. What do I check next? Red arrows show where lamps leads attach to board. Don't know the ohms if the internal resistor yet.
Lamp Specs
-Size: T1 Round (waterclear) LED or 3mm Round (waterclear) LED
Brightness: 16,000-18,000MCD
-Emitting color: Green
-Wave lenght: 520-530nm
-Forward voltage:9V~12VDC Compatible.
-Forward current Typical: 15mA or below; Max: 20mA
-Viewing angle: 25-35 Degree-