Throttle Voltage Test; Intermitted Power Loss - X-TREME XB-502 Owner's Manual

You should also check the brake inhibit switch (there should be a wire cable coming from your
brake handle), to see if it is making and breaking continuity. The brake inhibit switch turns the
throttle off when you put the brakes on. It functions like a 'kill switch' should anything go wrong.
You should also test the key switch in the same way.
You can test the motor by jumping from the batteries to the motor, but be aware that it will make a
large spark, or you can test the voltage at the motor connector while turning the rear wheel
backwards. The motor should generate a small negative voltage that varies with the speed it is
turning.
A smell test is also conclusive proof that you have a damaged controller or motor. If you can get
your nose close to one or the other and it smells like badly burnt broccoli, it's burnt out. Of course it
could also be burnt out and not smell, but if it smells it's burnt out.
Troubleshooting: Throttle Voltage Test
Follow throttle wires until you find its white connector. You will be testing the "Red", "Green",
and "Black" wires. Set your meter to test DC volts. Block rear wheel off the ground so scooter
will not take off. Turn the scooter on. Place the red meter test lead on the "Red" wire and the black
meter lead on the "Black" wire. The meter should measure +5 volts. Now place the meter red lead
on the "Green" wire. With out turning the throttle you should read around +0.8 volts. Now turn the
throttle wide open. You should now read around +4 volts. If everything else powers up on the
scooter and you do not have +5 volts between the "Red" and "Black" wire the controller is bad. If
you did not get the +.8 to +4 volts then the throttle is bad.
Troubleshooting: Intermitted Power Loss
While doing each of the steps you are to go and test drive the scooter to make it cutout like it was
doing. You will need a voltmeter for electrical readings and will also require a power cord that is
used on a computer which has the same type of plug that will plug into the charger port, with a
wire length of 2' and cut wire and discard the rest. What we are going to do is attach the voltmeter
leads to this computer wire and plug into the socket to watch actual voltage while riding and
mounting the voltmeter is a spot and secure it so it doesn't move but be able to watch it while on
test runs. I have provided a drawing of this called voltmeter connection.jpg above.
1. First pull up battery pack and pull the main power cord out of socket on battery pack to kill
all power.
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