Raymond walkie pallet jack with an error C66 indicate the electric brake coil driver has a shorted or open circuit. The most common problem to look for with this error is a broken wire near the brake coil. The brake coil is located on the drive motor. When the handle is turned, the wiring moves and eventually breaks.
| Code Definition | Brake Coil Driver Open or Shorted |
| Operator Display | C66 TA Flash Code “3,2” |
| System Response | No Travel |
| Reason | The TA detected an open or short in the Brake Coil Driver2 circuit. |
| Tests to Run | Troubleshoot wiring to and from the brake and the brake coil for opens or shorts. The brake coil should have approximately 14 ohms resistance. |
| How to Clear | Determine cause of short or open circuit and correct. |
Pinout Matrix
| Model | Connection | Functional Description | Theory of Operations Normal | Normal Level | Voltage Source | Voltage User |
| 8310 8410 8510 | JP1-5 | Output to Brake | The TA sends B– to activate the Brake. Brake coil resistance is approximately 14 Ohms. | Activated: 0V Deactivated: B+ | TA | Brake |
| 8310 8410 8510 8610 with Electric Power Steer | JP1-9 | Brake Switch Input | Monitored by the TA to activate the M1 (Main) Contactor. Open between 0 and 10 degrees from vertical or horizontal. The brake (deadman) switch acts to protect against travel while the brake is applied. The handle must be between 10 degrees horizontal and vertical in order for the brake (deadman) to be permitting travel. | Switch ON: 11.4VDC Switch OFF: 0VDC | SW2 | TA |