Schematic with component values:
> On Oct 17, 2016, at 3:14 PM, Dan Penoff via Mercedes <email@example.com>
> Have you researched this?
> Troubleshooting for the socket:
> This guy hasn’t been on PP for a little over a year (dead?) but if you’re a
> member you can PM him:
> There doesn’t seem to be an across the board end of all hassles fix for this.
> I’m surprised that someone hasn’t dissected one of these and duplicated the
> circuitry or figured out an alternative.
>> On Oct 17, 2016, at 2:04 PM, Meade Dillon via Mercedes
>> <firstname.lastname@example.org> wrote:
>> That's worth a try (DeOxIt) but I'm skeptical that will work. It's a very
>> simple system, just the magnetic pick-up sensor on the engine, the can
>> (tachometer amplifier) and the tachometer, and the wiring and a fuse.
>> Change all the fuses? Check the grounds? There is the big ground point
>> behind the instrument cluster on a 123? Maybe a ground in the engine bay
>> for the amplifier?
>> $400 is a lot of clams to troubleshoot by replacing parts, so you may end
>> up trying a "new" tachometer first. Maybe take apart the female receptacle
>> on the fender, and rig a test circuit to your spare tachometer
>> so you can test it first before pulling the instrument cluster? You'll
>> need the wiring diagram, soldering gun and solder and solder sucker or
>> solder wick, and some wires and connectors to hook up the temporary
>> circuit. I think the tach will want a wire for power, a ground wire, and a
>> signal wire from the amplifier.
>> Charleston SC
>> On Mon, Oct 17, 2016 at 1:06 PM, Andrew Strasfogel <astrasfo...@gmail.com>
>>> Oh that. I have a spare "can" and neither works for more than a minute or
>>> two, which makes me think the contacts in the receptacle (female unit) need
>>> rejuvenating with Deoxit, or that the tach combination gauge is somehow at
>>> fault (I have several spare gauges but pulling the cluster and resetting in
>>> place it is a royal PIA).
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