What is a ignition coil driver?
Introduction: Super Simple Ignition Coil Drivers (or spark coil) is nothing more than a low frequency auto-transformer with a relatively high turns ratio. It is often driven with a train of square pulses, as each pulse will store energy in the coil, which gets released suddenly when the DC is abruptly disconnected.
How do you check alternator tach output?
Set the meter to AC voltage. Connect the negative Meter lead to a good chassis ground in the vehicle and the positive lead to the suspected tachometer wire. Start the vehicle and wait for it to idle down to normal idle speed. At this point the meter should be displaying a fairly constant AC voltage.
How do you hook up a tachometer to an ignition?
Attach the ground wire for the tachometer to a suitable ground plane on your vehicle. Hook the ignition/ACC wire and lighting wire to available posts on the fuse block of your vehicle.
What kind of driver do I need for my tachometer?
If you have a modern vehicle with “coil pack” or “individual ignition coils” distributorless igntion you will need a tach driver like the MSD 8913 to drive the tachometer. Connect the signal from the tach driver to SIG 1 (In-Dash Tach) or purple wire (Pedestal Mount Tach) input.
Where is the tach signal on the ignition coil?
The most common locations for a tach signal are the negative terminal of the ignition coil or tachometer output terminal (HEI, Ignition Control Boxes or ECU). Verify 12V ACC, signal and ground connections (see above).
How can I Hook Up my Jeep 9117 to my tachometer?
If this is a 4.0, here are the instructions we have for hooking up a 9117 to your Jeep: Locate the dark green wire with a light green stripe at the ignition coil pack. You will cut this wire in half, then wire the 9117 adapter between the two cut halves. The adapter will then produce a usable tachometer signal output.