The law in most states requires that your travel trailer has an electric brake controller, and it's the best system to have if you're towing an 18 foot Aljo. The two main types of electric brakes are time delay and inertia; both are activated by pressing the brake pedal in your tow vehicle. A time delay brake system works by delaying the signal going to the travel trailer, slowing it so that it doesn't jackknife. Inertia brakes activate when the travel trailer speed exceeds the speed of the tow vehicle; this system also prevents jackknifing.
Travel trailer hitches are classified by the amount of weight they can carry, and it's no different for an Aljo 18-footer. Your travel trailer hitch should have provisions so you can connect safety chains; these are required by most states. When you connect the chains, they should have some slack to prevent any sharp turns, but they shouldn't drag the road. The different classes of tow hitches go by the gross weight of the towed vehicle, the tongue weight, which is how much the tongue (the bar attached to your tow vehicle), will bear, and the towing capacity of your tow vehicle; you can find this information in your owner's manual.
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Your Aljo travel trailer requires the standard wiring, which is the same in most states.You need ground wiring; it's important because it completes the electrical system and without it none of the other lighting will work. You'll also need brake-light wiring, running lights and power wiring, which allows the trailer's battery to be charged by your tow vehicle while the engine is running. Left and right turn signals and backup lights are also a must.