Greetings to all,
I'm learning a great deal just by reading through the forum entries here, have a question about an old Schwinn S350, found in a barn with a flat tire and dead batteries. I swapped out new batteries, of course (and confirmed that they should do the job perfectly, with both a voltmeter and by swapping them into an Izip). Before I fix the flat tire or do anything else, I'd like to know that the motor will actually run. When I power on, I get the green light, no problem. But turning the throttle... nothing. Taking everything apart, testing continuity on fuse, all connections, etc. The speed controller is where things get weird, because it doesn't look to be wired in any way that matches other descriptions I've seen here in the forums and elsewhere.
From the throttle, there are six wires. Not unusual so far, but the colors are gray, yellow, red, black, green, and red again. The wires actually split and connect to the controller via two separate connectors. On one connector, the gray, yellow, and red wires join into a five-pin connector, with the two free pins shorted by a small loop of blue wire. The five wires from that connector to the controller are gray, yellow, and red (matching the three coming from the throttle), and then orange and brown (the two that are shorted).
On the other connector, the black, green, and other red wire join to a three-pin connector, with corresponding black, green, and red wires leading to the controller.
I realize that one of these connectors most likely controls the main throttle function, and the other the power status LEDs, but disconnecting either makes no difference -- in both cases, the LEDs go out and the scooter is otherwise still dead.
There is NO brake lever connection that I can see. No separate line coming down from the brake (as I see on the Izip), no two-pin connector going into the controller. Even though I know this Schwinn S350 is supposed to have that feature, I sure as heck can't see it.
So the controller just has this strange two-headed connnection to the throttle as described above, as well as the main power connection (red and black) and the motor connection (also red and black).
I'm trying to narrow down where the problem might be, but I can't get around those throttle and controller connections. All I do know for sure is that the power is going to the main power light, to the LEDs next to the throttle, and definitely NOT going to the motor. (Checked with voltmeter.)
Any help untangling this strange assortment of wires (or for that matter, anything else to get this motor running) would be most appreciated!
Thanks again to all,