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. ------------- Max Charleston SC On Mon, Oct 17, 2016 at 1:06 PM, Andrew Strasfogel <astrasfo...@gmail.com> wrote: > 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). > > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
