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You can, but it will disable the fan and hot light functions - better to just install a replacement unit
 

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Can I bypass the charging side of the ecm on a 2003 Polaris magnum 330 4x4 with external voltage regulator rectifier
I know this is an old thread but I have a 2003 330 magnum. Voltage regulator was bad. So I got a 3 phase regulator off of eBay and all I did was unplug the three yellow wires from the ecm. Plugged my 3 yellow wires into that plugged hooked up a positive straight to the battery. And hooked up the ground. Now my quad charges just fine and everything else that the ecm does still works fine. So instead of a $300 ecm I fixed with a $30 regulator. Just wanted to share in case someone else had the same problem.
 

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Your question has now been logged into the queue and the next available forum member will answer you shortly. You will be given more advice than you could hope for.

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2008 800 ho efi, 2019 850 SP premium
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I know this is an old thread but I have a 2003 330 magnum. Voltage regulator was bad. So I got a 3 phase regulator off of eBay and all I did was unplug the three yellow wires from the ecm. Plugged my 3 yellow wires into that plugged hooked up a positive straight to the battery. And hooked up the ground. Now my quad charges just fine and everything else that the ecm does still works fine. So instead of a $300 ecm I fixed with a $30 regulator. Just wanted to share in case someone else had the same problem.
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You can, but it will disable the fan and hot light functions - better to just install a replacement unit
I know this is an old thread but I have a 2003 330 magnum. Voltage regulator was bad. So I got a 3 phase regulator off of eBay and all I did was unplug the three yellow wires from the ecm. Plugged my 3 yellow wires into that plugged hooked up a positive straight to the battery. And hooked up the ground. Now my quad charges just fine and everything else that the ecm does still works fine. So instead of a $300 ecm I fixed with a $30 regulator. Just wanted to share in case someone else had the same problem.
I'm so smart, I never considered leaving the battery wire connected to the unit to run the fan, but yes, if the unit functions and the only problem is charging the battery, an external rec/reg plugged into the alternator wires and separate wires run directly to the battery will solve the problem cheaply.

Good job and thanks for reminding me not to over think a solution.
 
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