[W126 Coupe] Tach Kaput

[Iain Gunn]

Make sure that your alternator is putting out the proper voltage and your 
battery is OK. These are symptoms of under voltage.
----- Original Message ----- 
From: <jeffk at gsm.udallas.edu>
To: <mbcoupes at mbcoupes.com>
Sent: Sunday, August 28, 2005 1:26 PM
Subject: [W126 Coupe] Tach Kaput


>I was having the usual fuel-pump relay problems with my '88 560SEC. As a
> temporary fix I got a relay from a 500SEC and it worked fine. Soon
> thereafter (coincidence?) my tach failed. All fuses are OK, speedo, clock
> work. Fixed the original relay, even replaced the EZL to no avail. The TD
> signal must be active, (meaning the cps sensor is OK, right?) else the
> N16/4 relay wouldn't work. This signal is routed through the X11 
> diagnostic
> socket, but without a 'scope what should I look for?
> When it rains, it pours....odometer AWOL now. So I'm going to have to pull
> the cluster out, I think. Any advice will be much appreciated. Thanks.
> Jeff
>
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