Downloadable Instructions are at the Bottom of this Page

Ram Promaster Alex ESD Troubleshooting Guide – Key Fixes

🚪 1. Door Does Not Move at All

• Check Fuse – Ensure power supply fuse is intact.
• Battery Voltage – Make sure control box is getting power.
• Check main harness connection – Wiggle or unplug/replug black connector at control box.
• VSS interference? – If door won’t close while driving, check vehicle speed sensor wiring (VSS).

🛑 2. Door Starts Moving Then Stops

• Check drive belt – May be too tight or too loose.
  • Belt should have 6–7 teeth of tension when door is closed.
• Check encoder cable – This is on the motor side. If it’s loose or damaged, reprogram or replace.
• Reprogram system:
  • Turn off ignition → unplug & replug control box → ignition on → press driver switch.
  • Door will cycle open/close with beeps, then stop open.

🔁 3. Door Closes Then Reopens

• Obstacle detection triggered – Clean belt track and check for physical obstructions.
• Potentiometer adjustment (on control box):
  • Turn clockwise to make obstacle detection less sensitive.

🎛️ 4. Door Doesn’t Work from Handle or Remote

• Handle microswitch should not be pressed when handle isn’t being pulled.
• Reprogram handle or remote:
  • For handle: Move jumper to J2, hold handle open for 3 sec → LED blinks.
  • For remote: Move jumper to J1, press remote 3 sec → LED blinks.
• Check battery in the remote or replace if weak.

🎤 5. Beeping Sounds

• Continuous while opening/closing = Learning mode or obstacle
• Long beep while closing = Encoder or belt error
• Fix:
  • Re-check encoder cable
  • Reprogram cycle
  • Adjust belt and potentiometer

⚙️ Key Fix Actions (Quick Links)

• Reprogram Door: Page 1-2 in manual
• Adjust Belt: Page 16
• Reconnect Encoder/Check Motor: Page 17
• Remote/Handle Reprogram: Page 2
• Potentiometer Sensitivity Adjust: Small dial on control box

🧰 If You’ve Tried That and Still Stuck…

Let me know:

• What exactly does/doesn’t work (buttons, remote, handle)?
• Is the door moving at all?
• Do you hear any beeping or motor sounds?
• Has anything been replaced or adjusted recently (belt, lock, motor, etc.)?

We’ll go step-by-step to get it sorted.

Downloadable Instructions

Information Pamphlet