How hard would it be to make the passenger window have the same auto up/down function as the driver side?

 

Easy.

Buy a drivers door from a left hand drive one

TBH I don't know, I thought just getting a switch may have done it, but I believe that is not the case.

Check the wiring diagram to see what's missing from the passenger side

Good luck

 

If only it were that easy

I've spent a bit of time looking into this as has a few other people on the other side of the pond. And as far as I know it's not yet been done.

I've looked at the hardware side of things and you will need another five way toggle switch (like the drivers side switch), a different switch underneath that, and you need to some how wire those into the existing circuit board to replace the existing passenger switch. Also you need to alter the Master Window Power Switch in some way so this new switch tells the passenger window to automatically go all the way up, or all the way down.

Even after you do that, I still don't think it would 100% work, as the passengers window some how uses the soft top control unit, where as the drivers window doesn't.

For some reason Honda made this amazingly complicated for no good reason. Why not just gives us auto up and down on both sides

 

Press and hold the button

 

I do keep meaning to look into making some kind of timed switch so you press the down button and it engages the window motor for xxsec's.

It's just another thing on my to do list.

 

Does look like a bit of a nightmare. Looking at the diagram I recon you'd possibly put in the 5 way switch, wire it to a whole seperate power window control unit. Then there looks to be some 'dectect circuit in the drivers window motor, so maybe you'd need to replicate that. PITA, nevermind.

You could maybe do somthing more mechanical where the switch kind of locks in the up/down position until you push it back to centre.