Speedometer & tach

[jimpagoda]

Hi to all
Any idea fabout those wires in the photo atttached
Thanks

[BobH]

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

[Pawel66]

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.