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Classic Truck Discussion Forum

wiper motor

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paulstem

04-14-2015 16:00:59




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I switched from 6 volt to 12 volt in a old truck. the windshield wiper motor spins like crazy. Will this burn it out?




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ShadetreeRet

04-29-2015 20:43:45




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 Re: wiper motor in reply to paulstem, 04-14-2015 16:00:59  
I tried to send you an Email, but I don't think it went through. I was thinking about this and remembered, "Google is your friend", so I Googled, "What is the best way to convert a 6 volt vehicle to a 12 volt system?" Found a lot of information, some good some not so good, but you may want to check it out, has a lot of tips on how to and what to use. Good luck.



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ShadetreeRet

04-16-2015 22:10:41




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 Re: wiper motor in reply to paulstem, 04-14-2015 16:00:59  
As the saying goes, "Google is your friend". Try looking for dual voltage "how to do" on the web or chances are good that you could find something on YouTube. This past weekend I found a good video on how to bleed injector lines for my daughter's tractor. So there is likely something there. Good luck.



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paulstem

04-18-2015 07:51:11




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 Re: wiper motor in reply to ShadetreeRet, 04-16-2015 22:10:41  
I've ordered a larger capacity voltage reducer. I just going to Y off of the 12 volt and feed all the 6 volt items on the 6 volt leg.



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ShadetreeRet

04-14-2015 21:31:01




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 Re: wiper motor in reply to paulstem, 04-14-2015 16:00:59  
Chances are the wiper motor will not last long. Under normal conditions, you can use a six volt starter with a twelve volt conversion and be OK because the starter only works intermittently. But under constant running conditions, such as wipers or heater fan motor, they will burn out prematurely. Years ago, you could get a voltage reducer to connect to the battery that only used six volts for accessories, but I don't know if they are still available or not. Check with a local parts house, they should know. If not you may be able to use a resistor or replace the motor with a 12v. How about the rest of the system, such as the heater motor, fuel sending unit, etc. they will likely need attention as well. Hope this helps a little.

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paulstem

04-15-2015 05:23:18




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 Re: wiper motor in reply to ShadetreeRet, 04-14-2015 21:31:01  
The heater fan motor, as you said, would be the same. Im wondering if an in-line resister to each of them would do it. Thanks for the advice.



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55 50 Ron

04-23-2015 09:45:29




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 Re: wiper motor in reply to paulstem, 04-15-2015 05:23:18  
The in-line resistor would quite likely need to be a different value for each accesory as each accesory would have it"s own current needed and the current AND voltage determine what the resistor value needs to be. Resistors are relatively cheap, but figuring the needed values can be a pain mainly because measuring the different currents for accesories can be a time consuming task requiring some good instrumentation.

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55 50 Ron

04-23-2015 09:41:48




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 Re: wiper motor in reply to paulstem, 04-15-2015 05:23:18  
The in-line resistor would quite likely need to be a different value for each accesory as each accesory would have it"s own current needed and the current AND voltage determine what the resistor value needs to be. Resistors are relatively cheap, but figuring the needed values can be a pain mainly because measuring the different currents for accesories can be a time consuming task requiring some good instrumentation.

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55 50 Ron

04-23-2015 09:48:41




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 Re: wiper motor in reply to 55 50 Ron, 04-23-2015 09:41:48  
also should add that these resistors may be rather high wattage requirements which means they are physically large and space for several may be a problem.



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