dave5711 Posted June 13, 2012 Report Share Posted June 13, 2012 (edited) Hi guys Wondering what you are using for a blower/heater fan motor in your trucks, if you are running a 12 volt system. Just the straight 12? or a resistor, or what? I ran mine on 12 to see if it would work, and it sure pumps. Not sure how long it would live, is my concern. Thanks! Edited June 13, 2012 by dave5711 Quote Link to comment Share on other sites More sharing options...
MBF Posted June 13, 2012 Report Share Posted June 13, 2012 I'm using the original motor with a Mopar ballast resistor. I have two vehicles set up that way, and they have been for years. They get limited use during the winter, but no problems to date. Mike Quote Link to comment Share on other sites More sharing options...
wallytoo Posted June 13, 2012 Report Share Posted June 13, 2012 Wondering what you are using for a blower/heater fan motor in your trucks, if you are running a 12 volt system. Just the straight 12? or a resistor, or what? I ran mine on 12 to see if it would work, and it sure pumps. Not sure how long it would live, is my concern. it won't live long on 12 volts without a resistor or reducer. on my truck, a previous owner converted to 12-v, but did nothing to alter the voltage to the heater motor (or wiper motor). when i first got the truck, the fan would work, but was clearly "missing" in spots. eventually, it wouldn't work at all, so i took it apart, and discovered that the solder to the commutator?? was in the bottom of the motor housing. i resoldered the connections, inserted an inline voltage reducer, and the blower motor works very well. understand that the reducer or ballast resistor will get pretty warm (or hot) during use, and locate it in an appropriate spot (i mounted the reducers for the blower and wiper under dash, below the steering column support. so far, so good. wally Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted June 13, 2012 Report Share Posted June 13, 2012 if you folks would make an in line housing in the duct work for the resistor to mount in you would cool the resistor on one hand and benefit from the heat it dissipates on the other..now granted some applications do not use a duct (some later car models do) you can investigate mounting the resistor in the heater housing in such fashion the fan blows over it.. Quote Link to comment Share on other sites More sharing options...
wallytoo Posted June 13, 2012 Report Share Posted June 13, 2012 you can investigate mounting the resistor in the heater housing in such fashion the fan blows over it.. there isn't much room between the fan and the heater cover in the 62/61 mopar heater, and i wouldn't want to mount it inside the defroster ducts themselves, as they are probably ignitable. there probably is a way to get some benefit from the heat, though. Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted June 13, 2012 Report Share Posted June 13, 2012 as stated..not that familar with truck applications..if you have any ducting at all, a small section of metal could be subsituted and the resistor mounted there..just an idea..if you recall, all the later model with the blower motor speed dropping resitors of today are mounted in the plenum..totally cools the reistor pack.. Quote Link to comment Share on other sites More sharing options...
55 Fargo Posted June 13, 2012 Report Share Posted June 13, 2012 I rigged up a 50 watt 1ohm resistor,it works just fine,resistor gets a little hot. If it were me, living in the USA, I would buy the 12 volt universal replacement motor from NAPA, for $30.00. That same motor in Canada is $70.00,so I cheaped out with a voltage dropper. New 12 volt motor,no resistor, just a resistor type speed control switch, and be done with it Quote Link to comment Share on other sites More sharing options...
wallytoo Posted June 13, 2012 Report Share Posted June 13, 2012 pics of the mounted reducers, for dave (the OP). Quote Link to comment Share on other sites More sharing options...
wallytoo Posted June 13, 2012 Report Share Posted June 13, 2012 If it were me, living in the USA, I would buy the 12 volt universal replacement motor from NAPA, for $30.00. That same motor in Canada is $70.00,so I cheaped out with a voltage dropper. New 12 volt motor,no resistor, just a resistor type speed control switch, and be done with it bought two reducers from Classic Parts in KC, MO. $12.95 each (one for the wiper). for me, it was easier to add the reducer than take apart the blower assembly (again) to add a new motor. especially true for the wiper motor, as that looks to be a bear to remove/reinstall. Quote Link to comment Share on other sites More sharing options...
55 Fargo Posted June 13, 2012 Report Share Posted June 13, 2012 bought two reducers from Classic Parts in KC, MO. $12.95 each (one for the wiper). for me, it was easier to add the reducer than take apart the blower assembly (again) to add a new motor. especially true for the wiper motor, as that looks to be a bear to remove/reinstall. Whats you have will serve you well, yes they get hot, but they are designed to handle a heavy heat load. Here is what I have done on my application, I bought a cheap 50 watt 1ohm resistor from Mouser Electronics for like $4.00, they sell the type you have too, for a little more. For my use, it should be okay, if not will pull blower off the front of the heater, and replace with 12 volt. Really will not be driving a lot in cold weather, in cool weather it heats up the cab quickly, it could be turned off , and used intermittently if need be. I have mine fused at 10 amp fuse, no issues with blowing fuses, so resistor must be doing it's job. A 6 volt blower motor on 12 volts, without a reducer, would draw a lot of amps on start up. Quote Link to comment Share on other sites More sharing options...
dave5711 Posted June 14, 2012 Author Report Share Posted June 14, 2012 I rigged up a 50 watt 1ohm resistor,it works just fine,resistor gets a little hot.If it were me, living in the USA, I would buy the 12 volt universal replacement motor from NAPA, for $30.00. That same motor in Canada is $70.00,so I cheaped out with a voltage dropper. New 12 volt motor,no resistor, just a resistor type speed control switch, and be done with it I live in Canada too, dude. I've wired it up with a resistor. The switch is as little sketchy, but it works most of the time...lol I don't think it needs to be too robust, as the truck will obviously not be driven in the winter Quote Link to comment Share on other sites More sharing options...
Dajudge Posted August 28, 2013 Report Share Posted August 28, 2013 Anybody know the NAPA part number for the replacement motor? I have the heater all clean and painted but my motor is dead. Just need a motor and the heater can go back together. Quote Link to comment Share on other sites More sharing options...
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