motor side and switch side

Hi everybody!

Is there a method to find the motor side or switch side of a window/door lock motor using a meter. Or is it better to just remove the door panel and make my connections right at the main switch?

I installed a window roll up module today and I wasn't sure which side was which. I sorta guessed...

The Switch side is usually the side of the cut wire that will show power when the switch is pressed.   

 In say an older Ford.  If you cut a lock wire, the sitch that loses ALL function, is the master, and the side of the cut wire that shows power in the operated position, is the switch wire,   and the other side is the "motor" side.   You can usually touch power to that wire and the motor would then run.

Isn't this a rather pointless question?
If the switches are in the door then the panel has to come off any way.
If they're in the car, well switch side = switch side!

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Thanks for your input Mark....... and Howie!!

I think it's more important to know which is the master switch.

I installed a window roll up/down/vent module on a two-door 2004 Toyota Tacoma, keeping in mind that the drivers side window was equipped with a "factory" one-touch feature (down only). The installation manual of the window unit pointed out that if a vehicle was equipped with a factory one-touch feature the aftermarket module MUST be interfaced between the window MOTOR and the factory one-touch module or relay.

First thing I did was print out a wiring schematic. Now the schematic tells you the colors of the wires going from the window motors to the switch. It also tells you the location of these wires and in this case they were at drivers kick panel (just like the 06' Mazda 3 I previously worked on). But, there is nothing about the location of a factory one-touch relay/module. Also, no information of how to determine which side of the wire, AFTER YOU CUT IT IN HALF, goes to the master switch or to the window motor. Of course, removing the door panels will help, but why work harder when I can work "smarter" and make all connections at the drivers kick. Well, I ended up removing the drivers door panel anyway since this year/make/model had this one-touch feature. The relay/module that controlled that feature must be located inside the door (even though I never did find it) because the wire colors for the drivers window were only at the master switch and not in the drivers kick.

There might not be an easy way around it. Maybe I just have to locate these motors every time. I use to own a 97' Acura CL 2.2 and I wanted to control the sunroof by remote (aux). I know the sunroof motor was under the headliner, but just never got around to disassembling the whole interior to get to it. There must easier way to do it.