2001 XLH Tach Bench Test Harley Ignition & Harley Electrics Discuss 2001 XLH Tach Bench Test in the Harley Tech & Harley How-to forums; Hey all, Anyone have a procedure for bench testing a tachometer? Not my bike so dont have alot of info. I do know it runs through the speedo. So both ...

[botzman]

Hey all,

Anyone have a procedure for bench testing a tachometer? Not my bike so dont have alot of info. I do know it runs through the speedo. So both have to be plugged in. Test meter numbers, etc? The manual has nadda. To clarify...tach not working at all.Thanks. Botz. Thanks Psycho!!

[unclepsycho]

I could have used this when the tach in my boat quit.....

How to Check Your Tachometer - Do It Yourself Hot Rod Kustom Website

although I aint too sure about hooking up a battery charger to a tach.

My normal thought is "If it is broke now; I cant break it any more"

Hope this helps.

[botzman]

Spoke with my buddy last night. More info. He just wants to know if there is a way you can hook power up to see if the needle moves at all. He thinks the tach is toast but not positive. Can you hook direct to a 12V source and get some kind of needle movement?

[HarleyCruiser]

No expert here, but the tach reads the pulse of the coil.
So........ without some sort of pulse like Uncle was talking about.
I have always bench tested them, well on the car/bike, but been many years since then.

Originally Posted by botzman

Spoke with my buddy last night. More info. He just wants to know if there is a way you can hook power up to see if the needle moves at all. He thinks the tach is toast but not positive. Can you hook direct to a 12V source and get some kind of needle movement?

[shovelmike]

An interesting bit of information there, Unclepsycho. Thanks!