Note: It is recommended to have a wiring schematic of your vehicle’s ignition system to clearly identify the Coil Positive (12 volt) supply wiring.
COIL HARNESS
TACH
ADAPTER
TACH ADAPTER
Model 9117
Sycamore, IL 60178
2511-737
Connecting to a Coil Pack
COIL (-)
TRIGGER 1
COIL (+)
12V
POWER
COIL (-)
TRIGGER 2
RED
GRAY
RED/
GREEN
BLACK
TO GROUND
GREEN
SHIFT LIGHT
TACHOMETER
GREEN
GREEN
TACH
ADAPTER
TACH ADAPTER
Model 9117
Sycamore, IL 60178
2511-737
Connecting to GM V-8 W/ C.O.P. Ignition (Vortec and LS-style motors)
Note: It is recommended to have a wiring schematic of your vehicle’s ignition system to clearly identify the Coil Positive (12 volt) supply wiring.
RED/
GREEN
RED
GRAY
BLACK
PINK COIL POWERS (LEFT & RIGHT) CUT AND JOINED
TOGETHER TO PASS THROUGH ADAPTER.
PINK
PINK
PINK
FROM COILS’
POWER SOURCE
Locate the ignition coil harness connector on each side of the engine. The most common wire color used for power to the coils is Pink. Follow the
Pink power wire away from the coils & connector to where it is most comfortable to work with (Auto Meter suggests 2”-6” away), then cut this wire in
half. Repeat this on the other side of the engine as well. Run the power-side Pinks (left & right) together and attach to the solid Red of the adapter.
Next run the coil-side Pinks (left & right) together and hook to the Red/Green of the Adapter. Ground the Black wire of the adapter to a suitable
chassis ground. The Gray wire of the adapter is your new tachometer signal output.
Note: Tach Adapter should only be used on this
application if there is no other tachometer signal available
at the vehicles Powertrain Control Module (computer).
Note: After installation, if the tachometer operates properly, but
stops working at a high RPM, then resumes working when below
that RPM, call our Service Department at: 815-899-0801
GRAY
GREEN
GREEN
GREEN
PINK
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