I have tried posting this message 3 times. The administrator says he does not know why it will not post. He said to resend it. I am retyping everything to see if I included some unsupported characters...
I am confused with the OP's statement that the on/off switch doesn't seem to work, but the high/low does?? If you can't turn the Jake on then the high/low wouldn't work. The high/low is simply a choice of whether to use 3 cylinders, low, or all 6 cylinders, high. If the high/low switch works then obviously the on/off switch works. Remember your foot has to be completely off the accelerator for the Jake to work at all.