Power Steering Motor

I figured out the wiring for the motor that will drive the power steering pump. I wanted a way to shut the motor off when PS wasn’t needed to save some amps. This would be primarily when sitting at long traffic lights, but I could also see using it on the interstate occasionally. I really depends on the amps the motor ends up drawing and if the PS pump can be cycled on and off. If it takes 5 seconds after switching the motor on for the lines to be pressurized then it’s a no-go.

My original thought was to tie into the parking brake light indicator. This comes on when the parking brake handle is engaged even a single click. There is continuity in that wire that I was going to use to trigger my relay. Turns out though I would need a normally closed relay and then the brake was engaged it would open the relay. That’s not what I bought, so considering that and the fact that the brake light is on all the time currently (when a battery is connected to the frame for testing) I opted to instead use a switch the presious owner had installed for some fancy blue light special around the radio bezel.

Here is me figuring out how everything needs to be wired with a junk motor from a cordless grass trimmer. The switch triggers the relay which can handle the amps of the motor. The switch even has a little light on it when it is on.

12V, 1200 amp battery makes 18V tiny weed wacker motor whirrrrrr!

12V, 1200 amp battery makes 18V tiny weedwacker motor whirrrrrr!

The next step is to figure out how to mate the shaft of the motor to these threads or hex (9mm?) opening on the PS pulley. And also how to mount the motor itself to maintain a parallel connection between the two. I think I’ll sleep on it some more.

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