THE COURTESY LAMP OR PARKING LAMP,,THAT IS BELOW THE HIGHBEAM BULB ON DRIVERS SIDE IS BRIGHT AND ON PASSENGERS SIDE DIM,,,,CHECKED VOLTAGE ON DRIVERS SIDE AT ,..WITH LIGHTS ON,,,10V ON PARKING LAMP ON PASSENGERS SIDE,,,6 VOLTS AND IS DIM,, I LOOKED AT WIRING INSIDE HEADLIGHT ASSEMBLY,,,WHERE HOOKS TO HARNESS ON WHEEL WELL,,VOLTAGE AT 12-14 VOTS HERE,,,NOTICED THE GRAY WIRE TO PARKING LAMP BULB HAS WHAT APPEARS TO BE AN INLINE RESISTOR OR DOIDE,,LOOKS BURNT, THAT WOULD EXPLAIN MY VOLTAGE LOSS ON THIS BULB ,,DO YOU KNOW WHAT TYPE OF DEVICE THIS IS ,,IM SHURE ITS A DIODE OR RESISTOR ,,WHERE CAN I GET ONE TO SPLICE IN HERE,,,OR WHAT

 

Could you please tell us what model and year your car is so that we can help you.
Shan.