2003 Toyota Sequoia Owners Manual - Page 713

03_SEQUOIA_U (L/O 0301) MATCHING TRAILER BALL HEIGHT TO TRAILER COUPLER HEIGHT No matter which class of tow hitch applies, for a safe trailer hookup, the trailer ball setup on must be the proper height for the coupler on the trailer. BRAKES AND SAFETY CHAINS CAUTION D If the total trailer weight exceeds 453 kg (1000 lb.), trailer brakes are required. D Never tap into your vehicle's hydraulic system as it would lower its braking effectiveness. D Toyota recommends trailers with brakes that conform to any applicable federal and state/provincial regulations. between the towing vehicle and the trailer. Leave sufficient slack in the chain for turns. The chain should cross under the trailer tongue to prevent the tongue from dropping to the ground in case it becomes damaged or separated. For correct safety chain procedures, follow the hitch or trailer manufacturer's recommendations. D Never tow a trailer without using a safety chain securely attached to both the trailer and the vehicle. If damage occurs to the coupling unit or hitch ball, there is danger of the trailer wandering over into another lane. D A safety chain must always be used 1 Coupler 2 Trailer ball 3 Ball mount attachment 307 2003 SEQUOIA from Jan. '03 Prod. (OM34422U)