Check my two speed fan wire diagram, Please

[tweakedlogic]

I located a two speed radiator fan from an 07 Grand Cherokee.

I have a single pole, double throw switch. I want to have a High setting and an auto setting. on Auto, the fan will operate in low speed after the thermosensor sees 180 degrees. High will happen when I flip the switch or when the A/C is on. But when the switch is in the off position, I need it off. So I can roll down the interstate, or go through puddles, and turn off the fans. I added a third relay to switch ground as well. Diodes isolate circuits.

I'm sorry for the crappy hand drawn diagram.

 

[tweakedlogic]

I just want to make sure I have the wiring layout correct and it will work.
Should I have posted this in different sub forum?

 

[James909]

It looks pretty good to me. But what is the point of using a relay to provide ground to the other relays? I would just eliminate that relay and ground pin 85 on the other 2 relays. Unless the reason you did that is to prevent the A/C from turning the fan on when the switch is in the off position. If so then what you posted will work. You could simplify it a little though by directly grounding pin 85 on the low speed relay since that one is not controlled by the A/C.

 

[tweakedlogic]

That is why I did the ground relay. It's summer but that doesn't stop me going though puddles. That and 70 on the interstate I don't need a fan.

I just wanted someone to double check me. My friends (that understand wiring) are lazy and said all if it was unnecessary. so I couldn't get a good answer.