Rev counter is not working

[Welsh]

OK, so before we start, I will state that wiring looms and me are not great mates.

So my rev counter stopped working about a year or more ago, I tried another unknown (very dusty internally) rev counter, still not working, but that is not proof?

Any good ideas on how I can test the loom to see if I am getting a signal?  eepwall:

Riding without it is no issue, but it annoys my OCD. atch:

 

[LouisXander]

 

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[allan.cawood]

 

[MellowJo]

 

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[MellowJo]

 

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[Coxwain]

 

[Welsh]

 

[Coxwain]

 

[Welsh]

 

[Welsh]

 

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[HB 9]

 

[shark_za]

 

[Welsh]

 

[Mayhem]

 

[Coxwain]