Upon a complete installation neither side works

Both Sides Consistently Don’t Light Up 

Potential Solutions:

• Both headlight fuses are blown. Double-check either by inspection or plugging in the halogen bulbs to see if they light up (if they do, the fuses are okay). Replace with 15 amp fuses if needed.

• The polarity is incorrect. Change the polarity and try all different settings until the lights turn on appropriately.

• If the fuses are okay and all polarity settings have been attempted but the problem remains, then there may be malfunctioning parts.