Wheelchair motors not moving with joystick - please help

Hey,
I hope I'm in the right section. I purchased an old electric wheelchair a little while back for a project. I ended up removing the motors, and the electromagnetic brake attached to it so I only had +and - wires coming from the motors. I basically removed everything from the chair including the joystick controls and motors. Now Ive decided to put it back together in its most basic form, ie frame, wheels, motors and joystick. The chair is an old merits, with a penny and giles joystick/computer unit as pictured here: http://www.esolutionsusa.com/ebay/Travis/Penny+Giles%20Pilot%20Wheelchair%20Controller%20D49629_4_2.JPG
I can get the unit to turn on, but the battery meter is flashing 3 bars which means left motor wiring fault. I had connected the motors the way they came off before with the wires the right way around, yet I cant get them move with the joystick. The only thing different is that there are 4 wires (2 for each motor) that used to run the electromagnetic brakes. I think it thinks theres an error because they are not connected to anything. I have also tried applying voltage to them and also connecting them together to make it think the brakes off. The motors work perfect when connected directly to 24v supply.
The chair worked fine before I dismantled it, the only thing different is the brake wires from the control unit are not connected because I removed the brakes on the motors for something else. I hope someone can help me in some way. I'm sure its something easy that ive just missed, I hope!

Cheers!
Tim

If it is a wheel chair it would have been designed in such a way that it could not be operated without the brake. That would have been a safety prerequisite such that if the brake was not present and fully functional the system would not permit the motor to engage. There must be some sensing for the brake , otherwise the system could be operated with a faulty brake which could be dangerous to the occupant.

Is this an Arduino project?

...R

Yes these systems are safety critical and the motor circuit, brake circuit and throttle
joystick circuit will all be sensed for fault conditions so that the thing won't move if
anything has come adrift.

Why do you want to dispense with the brake units - they are really useful!!

Thanks for all your replies. This was going to be an arduino project, but thought id ask anyway. I understand that the control unit/joystick acts as a fail safe if it has detected any tampering to the wiring or anything like that. It seems the solution is to put a resistor (will need to find which size) between the 2 wires that I cut off from the brake. I removed the brakes in the first place for a project I was doing, but decided to stick the motors back in the chair to use in my yard. I also cut the wires right back to the brake housing so its a little hard to reattach them. Oops! Oh well, a resistor will suffice.

Cheers!

Grandma passed away and now your hacking her wheelchair ? XD

tim99:
Thanks for all your replies. This was going to be an arduino project, but thought id ask anyway. I understand that the control unit/joystick acts as a fail safe if it has detected any tampering to the wiring or anything like that. It seems the solution is to put a resistor (will need to find which size) between the 2 wires that I cut off from the brake. I removed the brakes in the first place for a project I was doing, but decided to stick the motors back in the chair to use in my yard. I also cut the wires right back to the brake housing so its a little hard to reattach them. Oops! Oh well, a resistor will suffice.

Cheers!

Normally the brake units just unbolt from the end of the motor - giving the option
to replace with some sort of encoder perhaps.

Cutting wires off like that is a mistake you'll learn to avoid!