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I am in the process of installing the third controller on my
E-20 tractor. The first two units smoked on me and I am very concerned
that I have something wired wrong. In the process of tracing back all my
wiring, both newly installed and current, I discovered what seems to be an anomaly
with my pto switch. If I am reading the alltrax wiring diagram properly
the key switch has to be made, before power will be at the pto switch.
>From my E20 schematic I find this wire to be labled #15 which feeds through the
pto switch. Now the interesting thing is that on my tractor when I check
continuity through the pto switch from pto coil #27 and #15, I am hot, even
with the main key switch turned off. This is very perplexing in that both
the alltrax schematic and the ET both show the key switch having to be on,
before power is supplied through the pto switch. I haven’t done any
rewiring of the dashboard switches as I am reusing all the original connectors
and dash wiring for this conversion. On my last attempted controller
unit, it fried when I hit the PTO switch and I am concerned that I am picking
up power to it, even with the key switch off. I have discovered that if I
wire the #15 from the key switch to one side of the reverse & throttle
switches without going to the pto switch, as the alltrax schematic shows, I am
able to make the pto behave normally. In-other-words, if I have the key
switch off the pto switch is also off, but if I turn key on, then the pto will
work properly. My tractor does not have a seat or brake switches and
everything else seems to be stock. What am I missing, should the pto
switch indeed be hot with the key off? Thanks, Bob K. Robert
Kleinbrahm Senior
Network Engineer First
Republic Bank 415 288-1478
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