Strange low beam headlight problem
Thread Starter
2nd Gear
Joined: Jul 2015
Posts: 2
Likes: 0
From: Spring Branch TX
Strange low beam headlight problem
Hi guys, I have a frustrating problem with my low beam headlight and wanted to see if anyone has any ideas. I searched the forums quite a bit but couldn't find this exact issue. The passenger side low beam suddenly quit working, driver's side still works fine. I tested the fuses and relays and they are all good. Then I pulled the bulb and ballast off the car and plugged them into known good wiring, and they work fine. The problem seems to be with the wiring connector that goes into the ballast. I have 12 volts across the pins of the connector, but when I plug it into the ballast it will not light the bulb. I measured resistance from one of the pins to ground and got 10 ohms, which seems a little high, so now I am suspicious of a bad ground. Does anyone know what the resistance should be from this pin to ground? Are the driver and passenger side headlights grounded separately, or is it all one circuit? I don't have a wiring diagram and haven't yet pulled the headlight assembly out to study it. Any suggestions would be appreciated.
Thread Starter
2nd Gear
Joined: Jul 2015
Posts: 2
Likes: 0
From: Spring Branch TX
OK guys I am an idiot, just unplugged and re-plugged the main connector that goes from the car wiring harness to the headlight assembly, and now it works. Looks like it was a corroded contact in that connector. For future reference, if anyone has this problem, try unplugging and cleaning that connector before going through the effort of pulling the bulb and ballast off!
