84 quad lights, pass low beam works only with high beam

[Bobby Pootz]

Originally Posted by xs-style

I dunno about the op, but I'm just using standard Sylvania bulbs in my case

I also have standard Sylvania bulbs

Originally Posted by BHTH

In this thread (great thread by the way) look at X8430 and find the quad headlight diagram. There are three pins and two elements in the lowbeam (even in a quad light system). Your one element is burned out, the other is still good.

http://67-72chevytrucks.com/vboard/s...d.php?t=545416

Awesome thread for sure, thanks for confirming my problem!

Originally Posted by TKCR

Thanks for that link, I keep forgetting that hatzie posted all of those schematics. And I'm happy to see I wasn't being a ding-a-ling after all.

Looks like you were right after all!

I ordered another bulb and will post once it's in and hopefully working again.

Thank you everyone for your help!

Rob