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It appears to be equipped for trailer brakes.
The most common brakes on a tractor trailer are the s-cam brakes
Working Trailer brakes.
supplies air to the trailer brakes to allow the operator to release the brakes
You can buy trailer brakes in Autozone, although stock may vary by location. There is also a company located in Delaware that sells trailer brakes and other trailer parts called Eastern Marine - Trailer Parts Superstore online.
A small single axle trailer does not need brakes but be aware that your vehicle will have to stop the vehicle plus the trailer, so allow more stopping distance. A double axle trailer needs trailer brakes if you are carrying a heavy load of any kind at all.
Yes. However, the truck must be wired for a trailer equipped with electric brakes.
Probably the flasher unit needs to be replaced. This is an electronic switch which usually mounts underneath the dashboard.
8,000 lbs on 2wd with trailer brakes 6,500 lbs on 4wd with trailer brakes
Mercedes e320 towing capacity. 1900kg with trailer brakes. 750kg ( or about 1600 lbs) with no trailer brakes.
It's not the actual weight, but the weight rating of the trailer which determines if brakes are required on the trailer, and they vary from state to state. In most states, trailer brakes are required on any trailer with a GVWR of 3,000 lbs. or more. In some states, the requirements may be as low as 1,000 lbs.
You do not have the trailer lights connected properly.