How do I check my tachometer ??

[ron1978]

I have the Harley 2-5/8" tach , it lights up, and when I turn key on the needle looks to move and register right, but will not move when bike cranks
How do I check the gauge? It has a ground , positive+. And a S .

 

[tourbox]

First off what bike are we talking about? Ck. the ground & positive+ to make sure they are good and getting battery. I would think they are because the light works. The S terminal is the signal wire. I think it gets it pulse rate from the CKP sensor then thru the ECM.
tourbox

 

[ron1978]

2005 Roadking

 

[dbmg]

So are you suggesting that the tach has worked in the past and now is inoperative?

 

[gusotto]

Does it work after the bike is running?

 

[BUBBIE]

On the right in the 3rd picture ? ? ? ?

Could the Black wire be hooked up wrong? go UP and the Pink/white come down... NOT suggesting to try it but ASKING?

signed....BUBBIE

 

[dbmg]

On the right in the 3rd picture ? ? ? ?

Could the Black wire be hooked up wrong? go UP and the Pink/white come down... NOT suggesting to try it but ASKING?

signed....BUBBIE

Good question Bubbie which is why I asked my question. Surfing the web these Harley factory add on tachs can be a handful to properly connected related to year. It seems that this is not a plug and play option. You have to wire into said system on bike...