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Author Topic: Speedometer & tach  (Read 1101 times)

jimpagoda

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  • Canada, Quebec, laval
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Speedometer & tach
« on: May 22, 2024, 01:44:34 »
Hi to all
Any idea fabout those wires in the photo atttached
Thanks
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BobH

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Re: Speedometer & tach
« Reply #1 on: May 22, 2024, 08:38:58 »
Hello, it looks like these were used to ground the speedo, tach cable and temperature sensing line, in case one of the main grounds failed, and then the tach, speedo cable or temperature line could potentially form another path for the ground, which could damage the dash instruments.  I'm not sure if all cars have them?

https://www.sl113.org/forums/index.php?topic=7117.msg44947#msg44947
« Last Edit: May 22, 2024, 09:04:30 by BobH »
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February 1965 230SL Automatic
UK delivered RHD
Papyrus white, blue hard top & hub caps
Blue soft top
Blue leather

Pawel66

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Re: Speedometer & tach
« Reply #2 on: May 22, 2024, 15:14:44 »
I think they are clearly specified in early suppression kits: https://www.sl113.org/wiki/uploads/Electrical/Bosch_230SL_Suppression_Instructions.pdf

And they are absent in the later suppression kits.
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Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class
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