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MGB Non working tach.

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Celtic 77

Celtic 77

Jedi Trainee
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And the saga continues...tach isn't working. Any thoughts as the bugs are being sorted? Next step is to call Terminex!
 
Aftermarket ignition?

Since you've had other MG's in the past, I'll guess you've already tried lightly tapping the gauge... 😉
 
I think you need this. Works for me!
spiyda.com

Smiths Tachometer RVI to RVC conversion board -566-

A replacement circuit board to convert a Smiths RVI tachometer to RVC. (note - a single board kit includes the calibration cable, it is not included for multiples) download installation instructions RVI-RVC.pdf (Large File) The board is negative earth and will convert positive earth tachometers...
spiyda.com spiyda.com
 
If your fuel gauge is also not working, it will probably be a blown fuse. Before tearing out the tacho, check wiring under the hood - particularly at the distributor.
 
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