Got back to checking tach and speedo taday. Pulled the head, cable
no turney, so looks like I need a new cable. Tach has no signal at
the head, but did have a signal behind the battery. so, it appears
like either there is no signal coming out of the EDS computer or the
wire from the EDS computer to the head is lacking continuity.
Does anyone have any experience with either? Thanks
87 300D
Fred was the source for the wire by the battery, I remember it is a
two-wire connector but I don't remember the colors. My wiring diagram says
one wire is white, other is brown with a yellow stripe.
-------------
Max
Charleston SC
On Wed, Dec 2, 2015 at 2:03 PM, Curly McLain via Mercedes <
mercedes@okiebenz.com> wrote:
Thanks!
Going out to check for a signal as Max suggested. I looked before, but
didn't see much from above. I'll look again. I think i found the cable
plug Max referred to behind the battery. Brown and a white/? or ?/white
wires.
Curly.
The pickup is viewable from the top but accessed from underneath.
Fred
________________________________________
From: Mercedes <mercedes-boun...@okiebenz.com> on behalf of Curly McLain
via Mercedes <mercedes@okiebenz.com>
Sent: 02 December 2015 13:52
To: Mercedes Discussion List
Cc: Curly McLain
Subject: Re: [MBZ] 124 tachometers
Check the connection for the Hall effect pickup at the rear of the
engine. It often gets corroded, being exposed to road splash, and
gives an intermittent or very low signal. Mine works (as does the
idle speed control) only when it's wet, never have gotten around to
fixing it.
Might be a bad hall effect pickup, it's in the bell housing above
the starter if I remember correctly.
Peter
Thanks Fred and Peter for this info. Is the sensor accessed from the
hood or from underneath the car?
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