Step 1: Parts & Tools
Tachometer - - - - - Can be purchased from most any auto parts store for as low as $33. Mine was salvaged from my old truck
3M quick splice connectors 14-18 gauge - - - - - $4.10 (Walmart)
Automotive diagnostic tool-used for finding tachometer wire
Ratchet and sockets
Step 2: Tachometer input wires
Red- ignition power
White- illumination power
Green- tach wire
Step 3: Finding the tach wire
Step 4: Using the tach meter
Be sure to mark or remember the wire for when you come back later.
Note; When I was working on this project, I also installed a new stereo and rewired my instrument panel lights that had not been working.