1994 GMC Jimmy Owner's Manual - Page 198

Trailer Brakes If your trailer weighs more than 1,000 pounds (450 kg) loaded, then needs it its own brakes-and they mustbe adequate. Be sure to read and follow the instructions for the trailer brakes you'll beable to install, adjust and so maintain them properly. Your trailer brakes system can tap into vehicle's hydraulic brake system except: Don't tap into your vehicle's brake systemthe trailer's brake system will if ~ fluid from your vehicle's master use more than 0.02 cubic inch( 0 . 3 ~ of ) cylinder. Ifit does, both braking systems won't work well. could even You lose your brakes. 3,000 psi (20 650 kPa) of pressure? If not, the Will the trailer parts take trailer brake system must not be used with your vehicle. If everything checks out this far, then make the brake fluid tap at the port o the master cylinder that sends fluid to the rear brakes. But don't use copper tubing for this. If you do, it will bend and finally break off. Use steel brake tubing. Driving with a Trailer Towing a trailer requires a certain amount experience. Before setting out of for the open road, you'll want to get to know your rig. Acquaint yourself with the feel of handling and braking with the added weight trailer. of the And always keep in mind that the vehicle you are driving a good is now deal longer and not nearly responsive as your vehicleis by itself. so Before you start, check the trailer hitch and platform, safety chains, electrical connector, lights, tires and mirror adjustment. trailer has If the electric brakes, start your vehicle and trailer moving and then apply the trailer brake controller hand tobe sure the brakes are working. lets by This you check your electrical connection at the same time. 4-40