what does these abbreviations mean ......?

Hi all
can someone tell me what the abbreviations mean.. MH,MV,MLH,MRH,MRV, M+
PLEASE SEE ATTACHED PIC.
The wiring diagram is for the switch that controls the sideview mirrors

 

M+ is the power feed
MLH and MLV are for the motors in the left mirror.
MRH and MLH are for the motors in the Right mirror.

The motors controlled Left/Right or Up/Down by reversing polarity.
So depending on what why the switch is being pressed, you can have power or ground on the same wire at different time.

 

Thank you, do you know what "E" stands for ?

 

Ground

 

Thanks, I guess there is some complicated reasoning behind the decision to label a Ground wire "E" obviously it is a ground looking at the diagram, I was overthinking it and thought it meant something else...lol

 

E stands for Earth.
It was carried over from long ago when "grounding" rods were used.
You drove a big long grounding rod into the "Earth".


At least that's what I was told. And I'm included to believe it.
Because it makes sense.

BTW, most of the old ground rods are solid copper.
They are worth quite a bit of money. I pulled a few out of the ground from a couple old homes we've torn down over the years. Copper price are high these days.