2008 Toyota Tundra Owners Manual - Page 522

07 11.20 TOWING LIGHTS CONNECTOR FOR TRAILER BREAK−IN SCHEDULE D Your vehicle is equipped with wire har- D If your vehicle is new or equipped with any new power train components (such as the engine, transmission, differential and wheel bearing), Toyota recommends that you do not tow a trailer until it has been driven for over 800 km (500 miles). After the vehicle has been driven for over 800 km (500 miles), you can start towing. However, drive the vehicle at a speed of less than 80 km/h (50 mph) when towing a trailer for another 800 km (500 miles). In addition, avoid full throttle acceleration. MAINTENANCE XS30005 4−Pin connector ness sockets for trailer lights under the rear bumper. Use 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. The towing connector can be also connected to the trailer brake and trailer sub battery. 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". XS30006 D Retighten all fixing bolts of the towing ball and bracket after approximately 1000 km (600 miles) of trailer driving. 4−Pin, 7 −Pin connector 492 2008 TUNDRA from Apr. '08 Prod. (OM34477U)