i just installed some fog lights onto my ej8 and now the left side is not working?? i already check the wiring. it's good and already check if the bulb is blown.. it's good too. and when i plug in the right side of the fog light into the left side wires. it worked.so...HELP!

 

you have a dirty or poor connection somewhere on the power side, so that the right side is taking all the power and there's not enough current flow (amps) to light up both. could also be a poor ground to if both lights share the same ground connection. make sure all connections are nice shiny (bare metal)

 

sounds like a ground.