GoneDiving
Senior Member
Does any one have instructions or a wiring diagram to install an old encoder/pulse generator driven tacho in a Mercedes OM355?
Thanks
PS. Yes I know it needs a clean. ?
Thanks
PS. Yes I know it needs a clean. ?
I have recently worked on my own (Stewart Warner) tach senders. This type probably works in a similar way. If so, you should hook it up as follows:
Sender:
Body is the negative connection
Brown wire is the battery (+12V) connection
Blue wire is the signal
Instrument:
Body (case) is the negative connection
Red wire is the battery (+12V) connection
Blue wire is the signal (and should be connected to the blue wire terminal on the sender)
Test it at home with a 9 volt battery to supply power to the sender and to the instrument. Spin the internal rotating part of the sender a bit (by hand? Battery drill?) and you should see the instrument show some reading.
Good luck!
Nick