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Classic Truck Discussion Forum

Re: wiper motor

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ShadetreeRet

04-14-2015 21:31:01




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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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