(ET) one speed, no power E20

["Perry Cain" <perry suppleye com>]

Took my E20 out to mow, but I have only one speed.


There is no throttle, tractor runs at only 1 speed, and there is not a lot
of power.  The speed is not the slowest, but gets really bogged down on any
incline.  Not usable, really.


Ok, I have read through the entire archives, probably many messages more
than once, and I have tried to check what I could...

But I still need help.

I have visually inspected everything I can.  No blown fuses, board 4 looks
fine.  Board 3 had what appeared to be a bad varistor, so I replaced it.

I cannot see any burnt wiring, or any other problem areas.

I have checked all the LARGE Solenoids, they all seem to work.  
I checked the foot throttle, seems to be working fine.  (Also have tried
manually pressing the switches inside.)

Cruise Control does not work, but it never has....

In the row of switches in the top, next to card 4 & 3...
First two switches activate when key is turned.  Third switch activates 
when
throttle is depressed.  Fourth switch, (FW) never activates, from what I 
can
tell.  I have replaced it, but the result is the same.  If I manually press
the fourth switch (while turning the motor, of course) it still does
nothing.

I have checked all the wiring running to the motor.

If anyone can offer advice....

I am not an electrical engineer, but can use a meter, and have a general
understanding of things.

I have two working tractors, an E12s and an E12m, one runs ok and the other
I did the Alltrax addition.  This E20 I kind of wanted to keep as an older
"pure" version, so I do not really want to put an Alltrax in it. (not to
mention the expense....)

Thank you in Advance for any help you can offer.

Perry Cain
perry suppleye com
Akron OH