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Rad Power Bikes Production Site

RadWagon 4 Controller Replacement Guide

The RadWagon 4 controller can be replaced if you are instructed to do so by Rad Power Bikes Product Support. Watch the video and follow the instructions below to replace the controller on your RadWagon 4.

Tools Needed:

  • 3 mm Allen wrench
  • Flat side cutters
  • Zip ties
  • The replacement controller from Rad Power Bikes

The hardware or tools needed for your model may be slightly different. Make sure you use the correct tool and size for your bolts. Always make sure the tool is pressed firmly into the bolt head and turned slowly to prevent damaging the bolt.

Remove the old controller
  1. Get the bike ready for maintenance. Turn off the bike, remove the battery, and press and hold MODE to discharge remaining power.
    Turn off bike.gif
  2. Unplug the cables connected to the controller.
    1. Snip the zip ties securing the cables.
      Snip zip ties.gif
    2. Unplug all connectors from the controller by pulling each connector directly apart, without twisting. Repeat until all connectors are unplugged from the controller.
      Unplug all connectors.gif
  3. Remove the controller. Use an Allen wrench to remove the controller mounting bolts. Set the bolts aside. Recycle the controller according to local rules.
    Remove controller.gif

Continue to the next section to install the new controller.

Install the new controller
  1. Install the new controller.
    1. Place the controller in position on the frame so the side with the longest cable points toward the back of the bike. Pass the cables in between the seatstays.
      Install new controller.gif
    2. Center the controller.
      Center controller.gif
    3. Thread in the four bolts by hand. Tighten the bolts one half-turn at a time, moving in an “X” pattern, until tightened securely.
      Tighten bolts.gif
  2. Plug in all connectors. Locate a connector and its matching connector end. Line up the internal notch and pins (and external arrows) and press both sides directly together, without twisting, to connect. Repeat with the remaining connectors.
    Plug in connectors.gif
  3. Secure any loose cables with zip ties, and trim them to be flush and smooth.
    Secure cables.gif
  4. Check that all cables are out of the way of moving parts. Rotate the handlebar to check that it can move freely and that there is enough cable slack.
    Check cable slack.gif
  5. Reinstall the battery, test the bike fully before riding, and ride Rad!


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