Hello, I installed a speedo with a tachometer into my 2000 Suzuki Swift. I am pretty sure it came out of a Geo Metro with a four banger.
Everything BUT the tach works, so I was wondering HOW do I get the tach to work?
If I have the WRONG speedo-tach installed in this car, did Suzuki make a speedo-tach version for a 2000?
Note: I have heard that a 3-cylinder speedo-tack will NOT function in a 4-cylinder regardless of Geo or Suzuki. I have not confirmed this to be fact.

I just want the tach to work. If there is a way, pls let me know.

Regards,