Re: no oil warning, or ignorance ISN'T bliss

[Joe Yakubik <75363.2524@compuserve.com>]

Glen wrote:

>What has me really curious is why I get no idiot light/buzzer warning with no
sender
connected........

Thanks for the 5kt info!

- -glen<

While troubleshooting my cooling system (I had no "low coolant level" light AND
a dead coolant temp guage after replacing my water pump -- a dangerous
combination) I discovered "the magic fuse".

Fuse 27 in the '91 200 is listed in the fuse box cover as "eng temp sensor #2"
or some such nonsense; in the Bentley as "Electronic injection system" and when
you follow the wiring diagram for two different motors in the German manual "so
wird's gemacht" ( very loosely translated -- "how it's done") you see it also
connects the coolant system warning and the oil warning.  My car got good
mileage and had no trouble starting and had good power -- ie, no symptoms of an
ECU problem.  I checked fuse 27 and it was indeed, blown.  BTW the Autocheck
system showed a big yellow "OK".  I assume the system thinks "no news is good
news".  After replacing the fuse all warnings functioned normally.

As a matter of course now, when changing oil or doing a tune-up, I check ALL
fuses.  Dunno if you have a similar fuse on the '83 or '85 motors, but I'd start
here.

Joe Yakubik