Re: 740 day running lights
"Mungo "two sheds" Toadfoot" <firstname.lastname@example.org> skrev i meddelandet
>A small problem: The "knackered bulb" indicator in the car is lit but goes
>off if the sidelights or headlights are switched on, indicating a fault
>with a day-running light.
> One day-running light is brighter than the other because *both* filaments
> (stop and tail bulb - 21w/5w) are lit and the other only has the 5w
> filament lit. If I turn the sidelights on then only the 5w filaments are
> lit, both sides. The bulb *looks* fine but I haven't got a replacement to
> hand, nor a tester, which is at someone else's house at the moment.
> Are both filaments supposed to be lit when the day lights are on or just
> the 21w one?
Yes, both are supposed to lit.
I am 100 % sure, i do have the Volvo electrical diagram book for that car.
I guess Volvo made a shortcut in the design, otherwise they would have had
to arrange with an extra relay to turn the filament for the parking light
off when the day running light is on.