Headlight problem

[oj5joker]

Alrighy Zilvians!

Normally I don't need help but I'm pretty much stumped on this one, I have a
1993 240sx Coupe with brick lights and on my rt side Low beam bulb it is not working. I checked with a test light and voltmeter to see that the harness has power and it does.. but here is the tricky part once I put the bulb in it does not light up and the power wire no longer has voltage it drops to 0... and when I remove the bulb the voltage comes right back. Also if I leave the ground from the harness plugged in and put a straight power wire from the battery the bulb will light up, and if I leave the power wire from the harness plugged to the bulb and ground it to either the chassis or even battery ground it wont light up. and yes the high beam works on that side.

[s13trackstar]

I had the same problem on my car. After doing some major trouble shooting I was able to isolate the problem. It is your head light on off switch, over time the contacts inside the switch goes bad. I was able to fix it buy taking the switch a part and making adjustment to the copper plates inside the switch. Just be very careful not to break the plastic around the switch.You could use a small flat head screw driver.

[oj5joker]

Originally Posted by s13trackstar

I had the same problem on my car. After doing some major trouble shooting I was able to isolate the problem. It is your head light on off switch, over time the contacts inside the switch goes bad. I was able to fix it buy taking the switch a part and making adjustment to the copper plates inside the switch. Just be very careful not to break the plastic around the switch.You could use a small flat head screw driver.

That is very interesting that it would only do it to one side and not the other.. Thanks so much luckily I have another 240 with a known working switch so Ill swap them.

[oj5joker]

Update!

It did end up being the window switch thanks so much s13trackstar!