I have a Euro 1991 300TD 3.0 turbo.
The tach stopped to work and I can't figure it out.

Hoping to find a wiring diagram to see how the signal from the sensor travels. I don't care about not having the tach itself, it's the A/C that will not turn on because it's not seeing the tach signal.

Thank you in advance
martin

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1986 300GD, G-wagen with OM617A
1988 250GD, G-wagen with OM602A