RE: (ET) Troubleshooting details

[Dave & Debbie Barden <daveb seanet com>]

on my E12S 10 and 49 are the wires going to the field on the motor
> Hi Tom:
> 
> Got a chance to get the model and sn number if it helps
> Model is 26AE15BA  SN is JN15595  
> 
> Now a little more on the reveres problem
> 
> With the speed select in neutral, as I slide it toward the reveres side
> the relay  clicks on
> 
> You suggested checking voltage between wire 10 and 49,  10 was easy to
> find, but where is 49?  I don't have that many wires and could not find
> one marked as 49.  if it helps any my wire panel has two relays one that
> clicks on when going to reveres, the other that click on when in the
> upper forward speed range,  next to that is that second little card with
> a few large  resistors, and what looks like a large capacitor.    
> 
> -----Original Message-----
> From: Kuffa, Thomas [mailto:Thomas Kuffa carlisletire com] 
> Sent: Friday, May 16, 2003 11:18 AM
> To: Roy Vanderhoef verizon net
> Subject: Re: (ET) Troubleshooting details
> 
> 
> 
> Hi Roy,
> 
> I'm puzzled by the voltage measurements you obtained. If the wiring on
> your machine is original, I don't see how those voltages are possible.
> Were they taken with the tractor in the forward or reverse direction? I
> don't know if I've ever seen the complete model no. of your tractor, but
> I assume it's one of the older units with the transistor control card #1
> at the heart of it's control schematic. Normally you should have 0 volts
> between wire #6 and wire# 11 with the speed control in the neutral
> position. If you are taking readings on the supply side of the reverse
> relay, the polarities should never change. In the 1st thru the 3rd
> speeds, the voltage should stay at 36 volts and then decrease from the
> 4th thru 7th speeds in the forward direction. In reverse, you should see
> the 36 volts between the same wire no's. for all three backward speeds.
> Downstream of the relay( between wire # 10 and #49) you should see the
> polarity reverse. When you put the tractor in reverse, check to see if
> you are getting 36 volts( wire #49 positive and #10 negative). If not it
> sounds like you have a problem with the reverse relay. It is located
> inside the top half of the fuse panel inside the front battery
> compartment. Should be the opposite end from the fuses. Watch the
> contact closure between the middle and bottom set of contacts as you try
> reverse. Also check wire connections to all the terminals on that relay.
> Let me know how you make out.
> 
> Tom
> 
> 
>