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RE: Euro lights w/ Autocheck
Why doesn't your 5k have autocheck for the lights ... it should! FYI, I do
not plan to disable the function on my '88 5kCSQ, but I will have to make
some wiring mods (as I described in my earlier post) to make it work
correctly.
The autocheck headlight test function measures current difference between
the left and right headlight wires from where it is located. If you use
these wires to drive relay coils and have the power supplied to the bulbs
via the relay directly, I have yet to figure a way to make this work (note I
did not say it is impossible!). You did not state which bulb burned out ...
note that there are other modules that monitor the brake and tail lights ...
the relay mod for the headlights does not affect the function of any other
checks.
Keep in mind that it is not mandatory that you install relays with the Euro
lights ... AAMOF as long as you stick to stock wattages you shouldn't have
to worry about overloading the headlight switch. If the 200 still has the
stock headlight monitoring circuitry it would be my belief that the current
for the headlight filaments is actually still passing through the switch ...
Steve Buchholz
San Jose, CA (USA)
> ----------
> It seems everything I've read points to disabling the headlight Autocheck
> function when installing Euros. However, it appears that it is possible
> to
> have Euros and retain the Autocheck headlight function. My brother's 91
> 200Q had Euros from the PO, dealer installed (Barrier) in March 1992, the
> car was bought new Feb. 1992. There are four relays grouped on a bracket
> under the radiator cover, there are also a couple fuses installed in green
>
> rubber waterproof boxes closer to each light. I don't know how, but the
> Autocheck headlight function works, he burned a bulb yesterday and the
> warning light popped up instantly. Hmmm. Ideas? Anyone else have
> working
> Autocheck headlights w/Euros? This doesn't really matter for my 5KTQ, no
> headlight Autocheck, but I thought I'd pass on the info.
>
> -Matt Martinsen
> Seattle, WA
>
>
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