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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: bperri1 on March 15, 2014, 12:02:18 pm

Title: Only One low beam light works but all high beam lights work
Post by: bperri1 on March 15, 2014, 12:02:18 pm

I have an 84' K20 with quad headlights in the front. When I turn on the head  lights only the passenger side low beam works. Replaced the driver bulb and no light. The weird thing is when I turn the high beam switch on, all four of the head lights work. (the lows and highs) My truck is the 6.2l diesel if that makes a difference in wiring.

Title: Re: Only One low beam light works but all high beam lights work
Post by: Captkaos on March 15, 2014, 12:04:07 pm

Did you get the right bulb for that side with dual elements?

Title: Re: Only One low beam light works but all high beam lights work
Post by: bperri1 on March 15, 2014, 12:12:32 pm

Hey thanks for the reply!
T he low beam is a dual bulb? :o  Can you find these at a general auto parts store?

Title: Re: Only One low beam light works but all high beam lights work
Post by: bd on March 15, 2014, 12:20:15 pm

The upper lamps (4656 high/low beam) have three terminals apiece; the lower lamps (4651 high beam, only) have two terminals apiece.

Title: Re: Only One low beam light works but all high beam lights work
Post by: bperri1 on March 15, 2014, 12:25:49 pm

Okay I'll make sure I bought the correct one. Thanks!