Wiper question----12v

[woodscavenger]

I have searched but cannot figure it out.

I have a 12v conversion. I have electric wipers.

Will the motor stand up to 12v (obviously spinning faster) or should I put in a Runtz voltage reducer?

[steveplym]

I'm not sure how it would affect the motor, but I don't think a runtz would help you. Seems it will not work on motors like another voltage drop would.

Others may chime in here, but I have a ceramic type resistor for my heater motor, I would think you would need that, could be wrong though.

[builtfercomfort]

I'm thinking you would need a bunch of watts at about 1 or 1.5 ohms to drop the current down to a level that would not blow out the motor. Either a big ceramic type or something - a power resistor of some sort that converts excess voltage to heat.

[John Burke]

On my 49 Dodge I have stock 2-speed electric wipers. When I went to 12 volt I did not change anything on the wiper connection but I only use the wipers on low speed. They run fast like they are on high speed and I think as long as I only use the low speed they will be OK....no problems yet anyway....John Burke...

[james curl]

If the wipers are like the three speed heater, the switch which has a resistor on both of the two lower speeds, one is longer than the other to give two different voltages. The high speed is straight 6 volts. On my car I used a round ceramic resistor to drop the voltage to my heater switch. It drops the voltage too much because the heater runs on high speed about like the old 6 volt system did on low. The heater switch requires a resistor to run the heater on the two lower speeds as the switch gets too hot on straight 12 volts because the built in resistors are too small for 12 volts and generate a lot of heat.

[Plymouthy Adams]

here is the deal..if you continue to run a 6 volt motor on 12 volts you will be drawing about double the amperage..if you use the resistors, you will still be drawing the same amperage but the reistors protect the windings from having to dissipate the heat..this heat kills the windings over time...so chose the correct resistor ohm rating and wattage..you can double up the resistors in parallel to increase the wattage value...use ohms law...search it out on the net..it is easy to do what you want after a few minutes of reading and use of a good volt/ohm meter...