The fuses for the lights will not be carrying power till you turn
on the light switch. Those would be 1,3,7,9,11,13. The lights are
supplied power straight from the battery power bus, so the
ignition switch will not affect them anyway.
That said everything points to fuse 12. Take the thing out and
throw it as far as you can and replace it with a brand new copper
or brass fuse.
Curley McLain via Mercedes wrote:
Yes. I am glad it is a 123. The weirdness continues anyhow. The top
row of fuses: 1,3,5,7,... and window fuses a and b on the left side, all
have no juice, switch on, according to the meter. Some of them are for
headlights and tail lights, but weirdly, the headlights and taillights
work, but the turn signals don't. I checked this with a good digital
meter, black on engine, red probing fuse contacts. Bottom fuses (Even
numbers) and fses c, d, on the right, all showed 12.13V.
Switch? Wire from switch? Headlights are unswitched...but they work.
That was my first thought, but no amount of wiggling could create a
closed circuit, where generally with a bad switch, the contact can be
made by wiggling the key, or switching on, off, or wiggling key
counterclockwise.
The list being sure it was a ground, I tried there second.
Randy Bennell via Mercedes <mailto:mercedes@okiebenz.com>
March 21, 2017 at 4:51 PM
Aren't you glad it is a simple car? Could be a whole lot worse on a
newer vehicle.
RB
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Curley McLain <mailto:126die...@gmail.com>
March 21, 2017 at 4:35 PM
Y'all may remember a couple weeks ago I posted about the electrical
gremlins in the 240D (81)
The thing acts like it is possessed by the prince of darkness (Lucas)
not designed by MB/Bosch
These circuits all went out at the same time:
Gas gauge
temp gauge
turn signals (4 ways work)
both window circuits
heater blower
Today I dug into the cluster and loosened and tightened the chassis
grounds behind the cluster.
It resulted in no change.
I left the switch on in the process so if bad contact was made good, I
would hear the blower or other circuits working. There was nothing.
Where to look next? Either there is a bad feed to multiple circuits
in the fusebox or bad ground that affects all these circuits.
I'll head out with a meter to be sure all are getting juice, but my
thinking is still that I am chasing a bad ground somewhere. It does
not appear to be the grounds behind the cluster.
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