2004 Toyota Tundra Owners Manual - Page 362

'04 TUNDRA_U (L/O 0309) TOWING LIGHTS CONNECTOR FOR TRAILER BREAK−IN SCHEDULE D Your vehicle is equipped with a wire harness stored in the rear end under body. Some models are fitted with a socket for trailer lights under the rear bumper. Use either of them to connect and operate the trailer lights. However, the trailer lights must comply with federal, state/provincial and local regulations. See your local recreational vehicle dealer or rental agency for the correct type of wiring and relays for your trailer. Check for correct operation of the turn signals and stop lights each time you hitch up. Direct splicing may damage your vehicle's electrical system and cause a malfunction of your lights. 7−pin connector (with towing package)-This can be also connected to the trailer brake and trailer sub battery. D Toyota recommends that you do not tow a trailer with a new vehicle or a vehicle with any new power train component (engine, transmission, differential, wheel bearings, etc.) for the first 800 km (500 miles) of driving. MAINTENANCE D If you tow a trailer, your vehicle will require more frequent maintenance due to the additional load. For this information, please refer to the scheduled maintenance information in the "Scheduled Maintenance Guide" or "Owner's Manual Supplement". 4−pin connector D Retighten all fixing bolts of the towing ball and bracket after approximately 1000 km (600 miles) of trailer driving. PRE−TOWING SAFETY CHECK D Check that your vehicle remains level when a loaded or unloaded trailer is hitched. Do not drive if the vehicle has an abnormal nose−up or nose−down condition, and check for improper tongue load, overload, worn suspension or other possible causes. 7−pin connector D Make sure the trailer cargo is securely loaded so that it cannot shift. 362 2004 TUNDRA from Sep. '03 Prod. (OM34426U)