Weird things happening...

Conditions:

1. The drivers door is open, thus producing a constant buzzer noise whenever the ignition is unlocked but off, to remind me not to close my keys in the car.

2. The key has been turned to the #2 position, causing the door-open buzzer to STOP once the seat belt signal ends.

3. Once I've let all the buzzes stop....... if I stomp on the brake hard nothing happens.

If I just GENTLY press the brake, just down a few millimeters - like just down to the point at which the brake light circuit is turned on.... the buzzer goes "eek" and stops.

If I do this repeatedly, each "eek" gets a little more formidible, until finally I can make the buzzer buzz just by pressing gently on the brake pedal.

Is this a fuse going out? Wires crossed up somewhere? Where do I even start diagnosing it?

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

Disconnect the buzzer!

__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

It's not a fuse "going out". A fuse is either good or no good. It sounds like a possible wire problem at your ign. switch or the switch itself.

__________________
81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project

Check your ground straps for clean contacts and tightness as well. Sounds like the buzzer circuit may be being used as ground.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

.
Hello Everyone

My guess is a bad ground.

I would check the large engine ground strap first.

Take a look at the bowden cable, if it looks melted you definatly have a bad ground.


Trudging the road of happy destiny.
RichC

__________________

When the power of love overcomes the love of power the world will know peace.
Jimi Hendrix

BTW: You can't lock an open drivers door without
the key.
It is a safety feature just so you don't lock
your keys in the car.

Louis.

__________________
Not always the smartest but certainly not dumb?

I know fuses don't "go out", I guess I meant that if it had burned in two but was still in position to where it vibrated back together and made spontaneous contact or something... I had one do that before, it was burned but just barely, so every time I hit the brakes the overhead light surged for about a week, then that fuse went out, and I replaced it and the weird behavior stopped.

Incidentally... where IS the engine ground strap? I've been under there before but didn't know what to look for.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL