I have a 03 g35 coupe where one of my low beams won’t work. I changed all the bulbs so I know they are fine. The strange part is both my turn signals work fine. Any advice?

 

Ballast!

Telcoman

 

^^^^^^^

what he said

 

The turn signal light is work fine? If you can give more detailed information about the signal light?

 

The turn signal isn't commanded by the ballast but the headlights are. To confirm it's a bad ballast swap them from side to side and see if the problem follows. They're screwed in to the bottom of the headlight assembly and very easy to swap. You can find ballasts aplenty on eBay. https://www.ebay.com/sch/i.html?_fro...sedan&_sacat=0

 

I had the ballast swapped and nothing changed, just to be clear I’m referring to the two small amber lights on the headlight. I’m assuming there may be a wiring fault?

 

Ok so you're having issue with the turn signal lights, not the low beams, correct?

 

Yes, I apologize for referring to them as my low beams.

 

First verify it doesn't turn on when you turn the hazard lights on, if it DOES work then there's something wrong inside the BCM. If it does not turn on then verify the rear turn signal works on that side (with the turn signal switch, not the hazard lights), if no front or rear turn signal then check for proper operation at the BCM, left side turn signal is pin 45, right side turn signal is pin 46.

If the rears work then it's likely a wiring issue at the headlight or something feeding it. Start at the headlight plug (pin 6) and test for voltage, if you have voltage then there's something wrong internal to the headlight assembly, perhaps the socket is corroded or a bent pin in the harness. If there is not voltage at pin 6 then trace the wiring back or just abandon that circuit and run a new one back to the correct BCM pin.

Here's the harness at the light.



Here's the harness at the BCM (Section M2 has the pins you want).