the link below is for the owners manual for the quickie aspire power wheelchair, free download in pdf format.http://www.wheelchair-review.co.uk/wheelchair-files/wheelchair-manuals/sunrise-medical-wheelchairs/quickie-aspire-power-wheelchair.pdf
the "cane crutch holder" is an acessory part that you can get, fitted to the back of the seat, to hold a crutch or cane. it does not affect the chair itself at all.
there are two most likely reasons for your problem, neither of which actually involve the arm and controller.
1. if the battery light is flashing 9 times when you try to move, then you need to check the motor locks are engaged properly. see page 27 of the manual for photos and location. these are also known as "freewheel levers" and allow you to disconnect the motors to push the chair manually. if the levers are engaged properly, it is quite possible that the switch, or switch wires have broken and the chair thinks that they are off. these are very cheap and easy to replace and are located where the lever connects inside the chair.
2. if the battery light comes on and stays on, then you may need to have the batteries checked. if the batteries have not been charged for a while then sulphur may have built up on the lead plates inside the battery. this can mean that the batteries will show fully charged, but as soon as you try to draw power, they cannot function due to the sulphur, and instantly show as flat.
any auto shop should be able to perform a battery load test for you to test this. a 100amp load test for about 6 seconds will test the battery performance and let you know if they need replacing. most places will do this test for free but the batteries need to be fully charged first.
hopefully, one of these solutions will work as these are the most common fault for the symptoms you are describing. you should find the manual quite useful as well.
please feel free to ask if you need more information.
hope this helps