Installation and Troubleshooting Guide
This installation is to be completed by an Authorized Dealer or Professional Service
Technician. For questions regarding installation or warranty, call CDI Tech Support
at 866-423-4832. Do not return to the Dealer or Distributor where the part was purchased.
Contact CDI Electronics Directly for Return Material Authorization.
CDI Electronics, LLC • 353 James Record Road SW • Huntsville, AL 35824 USA
Web Support: www.cdielectronics.com • Tech Support: 1-866-423-4832 • Order Parts: 1-800-467-3371
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Rev H • 6/19/2023 Page - 2 of 4 QF-358
TROUBLESHOOTING
How to test the Engine Stop Circuit (Kill) for DC Voltage:
1. DC voltage present on the kill circuit of the Switchbox due to a faulty key switch, boat harness, or engine harness will severely damage
the Switchbox’s internal kill circuit. Connect a Digital Multi Meter to the Ignition Stop wire(s) AT THE SWITCHBOX while disconnected
from the Switchbox in reference to a known good engine ground. Turn the Ignition switch on and off several times. If, at any time, you
see over 2 VDC on the kill wire(s), there is a problem with one or both harnesses and/or the Ignition switch. The Ignition Stop wire
should not be connected back to the new Switchbox at any point until the problem is corrected OR DAMAGE TO THE SWITCHBOX
WILL OCCUR!
NO SPARK ON ANY CYLINDER:
1. Perform a visual inspection of the Stator and Trigger wiring to the Switchbox. Check to make sure that the wiring is correct, clean, and
free of corrosion, and that all connections are tight.
2. Disconnect the Black/Yellow kill wire AT THE SWITCHBOX and retest. If the engine’s Ignition now has spark, the stop circuit has a
fault. Check the key switch, harness, and shift switch (if present).
3. Disconnect the Yellow wires from the Stator to the Rectifier and retest. If the engine now has spark, replace the Rectifier.
4. Check the cranking RPM. A cranking speed less than 250 RPM will not allow the system to spark properly. This can be caused by a
weak battery, dragging starter, bad battery cables, or a mechanical problem inside the engine.
5. Check the Stator and Trigger resistance and DVA for your engine in the lists below:
Check the 2 cylinder engine as follows:
Read from Read to Ohms DVA (Connected) DVA (Disconnected)
Blue (Low speed Coil) Blue/White (Low speed Coil) 500-700 Ω 180 V Minimum 180 V Minimum
Red (High speed Coil) Red/White (High speed Coil) 28-32 Ω 25 V Minimum 25 V Minimum
Purple (#1 Trigger) White (#2 Trigger) 0.8-1.4K Ω 4 V Minimum 4 V Minimum
Purple (#1 Trigger) Engine Gnd Open 1 V Minimum -
White (#2 Trigger) Engine Gnd Open 1 V Minimum -
Check the 3 cylinder engine as follows:
Read from Read to Ohms DVA (Connected) DVA (Disconnected)
Blue (Low speed Coil) Engine Gnd 500-700 Ω 180 V Minimum 180 V Minimum
Red (High speed Coil) Engine Gnd 28-32 Ω 25 V Minimum 25 V Minimum
Brown (Trigger) (a) White/Black (or Black) (Trigger) 0.8-1.4K Ω 4 V Minimum 4 V Minimum
White (Trigger) (a) White/Black (or Black) (Trigger) 0.8-1.4K Ω 4 V Minimum 4 V Minimum
Purple (Trigger) (a) White/Black (or Black) (Trigger) 0.8-1.4K Ω 4 V Minimum 4 V Minimum
Brown (Trigger) (a) Engine Gnd Open 1 V Minimum -
White (Trigger) (a) Engine Gnd Open 1 V Minimum -
Purple (Trigger) (a) Engine Gnd Open 1 V Minimum -
NOTE: The 3 cylinder engines have several configurations to the firing order. Please refer to the Factory Service Manual to
make that determination. The pairing should always be as follows:
• Green Coil Wire goes with the Brown Trigger Wire
• Green/Red Coil Wire goes with the Purple Trigger Wire
• Green/White Coil Wire goes with the White Trigger Wire
Check the 4 cylinder engine as follows:
Read from Read to Ohms DVA (Connected) DVA (Disconnected)
Blue (Low speed Coil) Blue/White (Low speed Coil) 500-700 Ω 180 V Minimum 180 V Minimum
Red (High speed Coil) Red/White (High speed Coil) 28-32 Ω 25 V Minimum 25 V Minimum
Purple (#1 Trigger) White (#2 Trigger) 0.8-1.4K Ω 4 V Minimum 4 V Minimum
Brown (#3 Trigger) White/Black or Black (#4 Trigger) 0.8-1.4K Ω 4 V Minimum 4 V Minimum
Purple (#1 Trigger) Engine Gnd Open 1 V Minimum -
White (#2 Trigger) Engine Gnd Open 1 V Minimum -
Brown (#3 Trigger) Engine Gnd Open 1 V Minimum -
White/Black (#4 Trigger) Engine Gnd Open 1 V Minimum
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