All controllers work the same. have a look at some wiring layouts:
They have different connectors and even when they have the same connectors, the wires can be in a different sequence. some have connectors for lights, accessories and other weird things. Some have connectors that have two single wires that connect together to make a switch that switches on/off some optional feature like reverse direction, cruise control, EABS, regen, etc.
When you get a replacement controller, all you have to do is connect up the relevant wires, then do some settings in the LCD. It's pretty straight-forward if you can solder and are not colour blind.
With a KT, the things you need to look out for are:
- Speed sensor. Do you have one in the motor or a separate wheel magnet one. If your present LCD shows speed when the motor is free-wheeling, you definitely have a speed sensor somewhere.
- Pedal sensor. The settings for 12 magnet ones are complicated, but all others work without much trouble.
- Throttle. All throttles work the same with three wires, but some have additional features like battery LEDs, switches, speed display, voltmeters and other things. All those extra things are optional. You only need to connect the three wires. Even if you don't want a throttle, you should get one for testing.
- Phase angle and sequence. Very rarely, the motor won't work when you join the wires colour to colour, so you have to go through all 36 phase wire and hall combinations to make it work, and some motors have a different phase angle that needs to be set in the LCD.
- These controllers come with either sealed waterproof connectors or the block type. It's nearly impossible to get at the wires in the sealed ones if you need to test anything, so I recommend the block type.
- The only other thing is where you're going to put it. With the block connectors, you do need a bit of extra room for them. If your bike has a compartment for the controller, you need to make sure the new one will fit or find somewhere else to install it.
- If you already have waterproof connectors, they probably won't work with a KT controller even if they fit, apart from the motor cable.
- You don't need connectors. if I ever find any that don't match, I cut them off and solder the wires, which is the cheapest, quickest, most reliable and most convenient solution. It also gets around the problem of not enough space for the connectors or cutting the wire to the correct length for a neat installation.
