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Posted by Sherman in Idaho [72.47.9.37] on Wednesday, August 29, 2012 at 20:15:50 :
In Reply to: Re: wiper motor options posted by Jerry in Idaho [69.59.83.175] on Sunday, August 26, 2012 at 18:35:28 :
You're right not to try a resistor-type "voltage reducer". The load on a fan blower is steady. The load on a wiper motor varies tremendously depending on where in the stroke the motor is, let alone any snow on the windshield. A wiper motor needs a "stiff" power supply, not a simple resistor. I know, because I've experimented and made regulators that worked. I won't bother with the details here. I don't know of anyone who makes a proper 12 volt to 6 volt converter that really does put out a good stiff 6 volts and will do it at up to 10 amps or so, which is what the wipers need. Better to convert to 12 volt motors.