Mounting Electric Brake Controller

Hi Graeme,
As an accessory fitter, when we fit the units we only look at functionality of the units placement, as in that you can access the slide and the wiring fits etc... there has as far as I am aware through the business that I work for (well known 4wd franchise) been no known reason that we have come across relating to the unit being vertical or horizontally mounted, only that you can access it easily when needed and its firm mounting. Someone else may have a reason but after fitting a fair few no reason that i can recall.
Hems

Most controller units gauge braking effect by a combination of brake pedal use and momentum... hence the vertical mounting means that part of the controller won't work that way.

Perhaps the H-R works differently if the instructions aren't explicit about not mounting it vertically.

As many have said .... "make Google your friend"
You will find all you need here Site Link

& took all of 1 minute.

Thanks for the feedback. The instruction sheet that I have [came with the unit] is different to the page now available on the internet, so I will copy that and show it to the auto electrician who told me the unit will not work if mounted vertically.
Will soon find out when I hook up the van on Tuesday

I would place it where i can get to it and use the slide. I came down an incline once offroad and had to make adjustments on the way down as the trailer was locking up and sliding due to the track surface. Of course if you are sticking to only the road then it probably does not matter