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Testing Your Alltrax DCX/NCX for EZGO PDS or DCS Cars

First, print off the correct wiring diagram:
PDS Wiring Diagram
DCX Wiring Diagram

Testing Procedure Setup:
  1. Unplug Your Battery Charger
  2. Jack up the rear wheels
  3. Put Your Vehicle In Forward
  4. Key On
Check The LED Light Blink Codes
Located the LED light on the face of the controller to the left of the harness plug.
Is there a green light? - When the controller comes on, it should blink green 4 times, indicating it is programmed for an ITS throttle, then it should go solid green.

When you apply full throttle the light should turn an amber color (not red), which indicates the controller is getting full throttle..

Does it blink red? How many times? Check the DCX Mini Manual to see what the blink code means.

Multimeter Voltage Tests

B+ to B- Controller Test
Take a voltage reading across B+ & B- on your controller. Before the solenoid closes it should be about 18 to 20 volts, if you have a pre-charge resistor on your solenoid. If you don't have a pre-charge resistor you may not have much voltage at all.

Apply a little throttle. You should hear the solenoid close. After it closes you should have pack voltage 36 or 48 volts.

Multipin Connector Tests
Carefully pull the 10 pin connector back about 1/4 inch so you can see the pins on the controller, but the connector is still making contact with the pins.

For all of these multimeter readings you will be testing voltage with your black lead on B- on the controller.

You will be testing pins 3-10, and they should have pack voltage at different stages.

Pin 10 & 9 (Logic Power & B+ Caps Power) - When the tow/run switch is in run, you should have pack voltage. If you don't you could have a bad tow/run switch, or a bad reed switch in the charge receptacle.

Pin 8 is skipped.

Pin 7 (Solenoid Coil) - You should have pack voltage until the solenoid clicks at which point it will drop down to about 0.5 volts. If you don't, check to see that the diode on the solenoid is not on backwards or has failed.

Pin 6 (KSI Key Switch) - You should have pack voltage when the key is turned on.

Pin 5 (Foot Switch) - When the pedal is up, there should not be voltage. When the pedal is down you should have pack voltage. If you don't have voltage you may have a faulty foot switch.

Pin 4 (Reverse) - In forward you should have no voltage, in reverse you should have pack voltage.

Pin 3 (Horn) - In forward you should have pack voltage, in reverse you should have about 0.5 volts.

Pins 1 & 2 are throttle pins. See this document for testing your ITS throttle.