[EMAIL PROTECTED] writes: >> ...Even if the lights are all working, I belive the warning lamp can >> illuminate if you have different wattages in the various >> lamps. Everything has to be "in balance" to extinguish the dash >> lamp.... >> > I believe you are thinking about Karma or something. All the lamp out > module is looking for is current flow in a particular circuit reduced > below a preset level. For example, doubling amperage in the brake > light circuit will not turn on the lamp out light. But, putting in a > relay when installing brighter headlight bulbs will turn on the light > because the relay draws considerably less amperage than a 55W > headlight filament.
I thought it worked by something like a wheatstone bridge arrangement, e.g. assuming nothing is burned out, the current flow through the lamps on the left will "balance" the current flow on the right. When a eventually burns out this will throw off the balance and trigger the "lamp out" warning. The same effect *could* be triggered by having a higher wattage bulb in the left parking lamp than the right. I don't know if it's as simple as left side vs. right side, or it may not work that way at all. I do seem to recall Marshall (I think) saying that different wattage bulbs could trigger a false alarm, though. Allan -- 1983 300D (with no lamp out indicator so I really don't have to worry about this issue). _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
