if you think you will have a problem in the future with plugging the connectors in backwards, why not just only use one connector to unplug. leave the black wires connected, and just unplug the red wire. then you can use the same connectors you have now. i don't think you will make this mistake again.
if you have 5V on the hall sensor power, then you can test the hall signals by plugging the 5 pin connector into the motor and while the controller is powered up, measure the voltage on the BGY wires there where they come off the pcb as you slowly rotate the wheel.
the hall sensor lead will toggle up and down, between 0V and about 5V (4.93?).
if the hall sensors toggle, then you can look for the outputs from the microprocessor that goes up to the mosfet driver ICs.
when the hall sensor switches, it causes the microprocessor to switch the phase wire connection through the mosfets. so the mosfets will turn on and off as the wheel slowly rotates as the hall sensors toggle on and off. you will see the three traces from the micro run up to the little surface mount ICs that switch the hiside mosfets, and another three will drive the loside mosfets.
the hiside mosfets are between the battery plus B+, and the phase wire, and loside mosfets are between the phase wire and the battery negative B-. it may take some time to determine which ones, but usually they come off the micro on the 3rd, 4th and 5th pins on the top counting from the left. but that is just guessing and you should be able to see them run up to where the mosfets live.
if nothing else, this is educational, and helps you understand what people are talking about when you read here.
the rapping on the table technique is actually everybodies favorite because it is so easy and the solder sucker is so hard to get right onto the hole while the solder is still molten so i agree with the knock it out method too. but first cut off the legs all the way down to the hole, and remove the mosfet from outa the way so you can get the soldering iron onto the holes. save that insulating layer and the round insulator under the screw. they are critical. BOL.
Last edited by dnmun
on Jul 21, 2012 4:11 pm, edited 1 time in total.