There should be a filament lit up in all 4 when the high beams are on.
But keep in mind, the outer bulbs are supposed to be DUAL FILAMENT.
There is a low filament and a high filament in each outer bulb. They can
burn out separately and they have separate wires feeding the 2 filaments
in them and those can also burn out separately. So when you switch from
low to high the live wires to the outer bulbs switch to make the outer
bulb light the high filament instead of the low filament.

Mark

John Rodgers wrote:
> On my 88GL, when  lights are on low beam or dim, its the outboard lights
> that are on, and the inboard bright lights are off. Switching from low to
> high beam, the low beams lamp turn off, and only the high beams are on.
>
> On my 91Carat, when the low beam out board lamps are on, the inboard high
> beams are off, but when I switch to high beam, ALL the lamps turn on. All
> four
>
> Anyone know what the deal is supposed to be on the lamps/lights?
>
> John in Birmingham
>