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Old 05-05-2022, 12:37 AM   #11 (permalink)
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Originally Posted by XCRN View Post
I am looking at ways to remove load on the engine of my Jeep while retaining function. I think a good start is going with an electric pump which can be made to work easily. However I want to refine it since most retrofit installs have the pump either off or running 100% which I think will add the load back to the alternator negating gains. I want to be able to vary the amount of voltage based on speeds since I will only need it 90-100% below 25mph and can lower the voltage as speed incrases so cruiseing at highway speeds, the pump will not create load on the motor.

What are options where I can program a PWM output based on a VSS input? I was thinking of using a variable voltage fan controller from a Grand Caravan to regulate voltage to the pump, but I need something to tell it how much voltage to send.
go to a junk yard and pull one from a newer model

Last edited by Tahoe_Hybrid; 05-05-2022 at 12:44 AM..
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Old 05-08-2022, 01:07 AM   #12 (permalink)
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A normal power steering pump uses 4 amps or so under no load.

There's no point making your own controller when there's well-tested OEM solutions. Find a pump off some other car, figure out which wires to jump or feed a fake signal to so that it works. The internal logic is good enough to handle "slow pump down when no pressure", no need for connection to the body controller.
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Old 05-19-2022, 11:45 PM   #13 (permalink)
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You could take a look at the Nissan Versa electric Steering column. They’re cheap on ebay and supposed to work in a default mode.

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