EZGO Shuttle 6 (Curtis 1264) Issue Help

[ThatSloanGuy]

Hi all!

I have a 2011 EZGO Shuttle 6 with a Curtis 1264 controller in it. I’m not getting any solenoid click and after seeing no status light on the controller to indicate a fault.

I verified Run/Tow switch continuity and started going through the pins via the service diagram. I am missing pack voltage on both side of the key switch (Pins 1 and 12) even though I have pack voltage provided to the controller at pins 2,3, and 4.

Does anyone have any ideas of other avenues before I replace/rebuild the controller? I have troubleshot several carts before, but am not familiar with the 1264 controller any anything I may be missing.

Service Manual:
https://www.buggiesgonewild.com/atta...6&d=1379973758

[JohnnieB]

Just a guess, but the solenoid activation logic for 1264 might be the same as it is for a 1206MX (36V PDS).

If so, the pack voltage has to go through the F/R switch before it goes to the keyswitch.

Drawing of the solenoid voltage paths through a 1206MX controller attached.

[ThatSloanGuy]

I thought the same thing but am getting 0V on the supply pin for F/R as well.

[ThatSloanGuy]

Originally Posted by JohnnieB

Just a guess, but the solenoid activation logic for 1264 might be the same as it is for a 1206MX (36V PDS).

If so, the pack voltage has to go through the F/R switch before it goes to the keyswitch.

Drawing of the solenoid voltage paths through a 1206MX controller attached.

I thought the same thing, but am also getting 0V on the source pin for the F/R.

[JohnnieB]

Sounds like a bad PC Board run, or bad connection(s) between 24 pin plug & jack.

[JohnnieB]

FWIW:

If the controller is bad, Alltrax does have an XCT replacement for it.

From what I understand, a different adapter cable is used for a 1264 and a 1268.

[ThatSloanGuy]

Originally Posted by JohnnieB

FWIW:

If the controller is bad, Alltrax does have an XCT replacement for it.

From what I understand, a different adapter cable is used for a 1264 and a 1268.

Thank you for your help! Although not good news, good to have confirmation before taking the next step.

[JohnnieB]

Might be able to check the voltage paths through the controller with an Ohmmeter.

Disconnect the battery pack and short between the controller's B- and B+ terminals with a 100Ω or so resistor to discharge the filter capacitors. The measure from J1 Pin-2 (Logic voltage B+ from Run/Tow switch to controller) with the keyswitch on and F selected on F/R. Should get continuity to Pins 7, 10, 1 and 12. also on either Pin 6 or 8, or both when pedal is pressed.