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I bought a 2007 Honda Rancher 420es with known shift problems. It wouldn't shift with ES, only manually. When I got it home, the first thing I did was unscrew the handlebar switch and saw there were 2 shorted out wires which were very short in length so I just bought a whole new switch (Honda Brand). After that was replaced it still wouldn't switch gears. When you push the shift buttons, nothing at all happens..no click, no shift motor engaging, nothing. The Neutral indicator light was flashing the code for the shift angle sensor so I replaced that. Then, it flashed the code for shift motor so I replaced that too. Now, the neutral light is no longer flashing however it still won't shift. It does now click when I try to shift up but nothing when trying to down shift. Where do I go from here? I've replaced 3 components..this is so frustrating!! Any ideas?
 

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This is the EXACT reason i specifically purchased a manual foot shift. no extra bs to get you in a bad way.

Lots of knowledgeable members here. youll get an answer soon im sure! Hope you get it figured out

most things ive read about your issue is a bad battery.
 

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Were the shorted out wires in the bundle of wires going down the handlebar?
Shorted wires can burn out the ECU.
I assume you looked at the reduction gears when you replaced the shift motor.
So you may need a new ECU.

If you want to save some money, I can make a relay system to bypass the ECU.
It will also bypass the angle sensor, and wiring harness, and work with a
weak battery. Message me for details.
 

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If you did not look closely at the shift motor reduction gears,
then remove the shift motor again and make sure the gears
that engage the shift motor shaft turn when you manually
shift gears with the manual shift tool.
Shift up from neutral, and back down, while looking at the gears.
The partial gear arm should move a little bit, and the 2 reduction
gears should turn quite a bit.
 

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Can you hear any movement in the shift motor/gears? I had this where it was coding Angle Sensor & it ended up being in the wire harness. Easy check is unhook & inspect each connector as opposed to buying the parts :O
Once past that, post what you found from that point.
 

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Do you hear a click when you press SHIFT UP?
And does the click sound come from the shift motor?
If so, that would indicate a shift motor reduction gear linkage jam.
Then you would need to remove the shift motor and test the reduction gears
which are easily visible, and consist of 2 double/concentric gears
and a partial gear arm which is attached to the shift shaft (same as manual tool).

If you have a voltmeter you can disconnect the shift motor connector and
measure the voltage spike when you press the shift up button.

If the above is true (gear jam and voltage spike) then my relay system
will not help. If there is no voltage getting to the shift motor,
then you can use my relay system to fix it at my .com website - subzerosound
 
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