Mystery glowing

[sotakoira55]

Hi, tnx for add. My 86 Burb headlight Hi-bulbs glowing dim, and there is apro 2V current, Where i should start looking that mystery fault. Low and high works anyhow, but Hi-bulb stay glowing after change to Low. And sorry for my English.
Yours
Marko
Suburban 1500 6.2D 4x4
Finland

 

[yevgenievich]

Low beam has two filaments and high beam should have one. Sounds like wrong headlight or wiring is wrong. Low beam lights up with higher power when on low. When lights switched to high, low beam changes to lower power output and high beam turns on.

 

[theblindchicken]

I'd check the wiring at the connection to your headlights. If nothing is crossed and all looks good, check the headlight switch to ensure that there isn't a low powered constant hot there.

Is it at all times? Always with the low beams on, or only after switching from High's to Low's? What about if you just turn on the parking lights, but not the headlights yet?

 

[75gmck25]

Also check the two black headlight ground wires (one on each side) that are attached to the firewall support. If the lights are not properly grounded you may be getting voltage that back feeds somehow to the high beams through another ground path.

Bruce

 

[Camar068]

Also check the two black headlight ground wires (one on each side) that are attached to the firewall support. If the lights are not properly grounded you may be getting voltage that back feeds somehow to the high beams through another ground path.

Bruce

Was about to type the same thing.