Electric brakes on camper trailer

Or an electric magnet problem. Have seen them get an open circuit or wires break where it enters the magnet body in the past. Bob.

Hi

The brake controller will put out proportional voltage dependent on the stopping motion and having the brakes on.
If the wireing was too small then both sides would be affected.
In reality you will require a wire from the controller to the brakes to be about 3-4 mm in dia. Else you will experience both voltage drop and this will in turn affect the braking performance.
lower voltage means less current available at the braking solenoids.
The other problem may be the brake adjustment.
Maybe just lift the trailer and remove the wheels and hubs and see what may be wrong.
Ig you are unsure what to look for check both side and see if there is any differences in movement, wear, bits not seeming to be in the right place etc.
Electric brakes are very simple in their operation, An arm with a cam to push the brake shoes out. the arm has a solenoid magnet attached and this will be attracted to the brake drum. The solenoid will rub/hold the drum so have a look at the surface for wear/oil etc.

Good Luck

Geoff

Lex,
thanks for your no nonsense suggestion-will get hold of a clampmeter and follow your logic.
Last time I had the drums off doing some routine maintenance the magnet on the suss side looked a bit suss, so I think that may be my issue.
Appreciate everyones feedback!
Tass