Technical Service Bulletin EL01503 — 2003 TOYOTA TUNDRA
ELECTRICAL SYSTEM
Bulletin Details
| TSB ID | EL01503 |
| Manufacturer | |
| Vehicle | 2003 TOYOTA TUNDRA |
| Component | ELECTRICAL SYSTEM |
| Communication Date |
Bulletin Summary
VEHICLES EQUIPPED WITH AUTO-OFF HEADLIGHTS AND TRAILER TOWING PACKAGE MAY EXPERIENCE A CONDITION WHERE THE TOW TAIL RELAY STAYS ENERGIZED WHEN THE HEADLIGHT AUTO-OFF FUNCTION IS USED. THIS BULLETIN PROVIDES INSTRUCTIONS TO INSTALL A SUB-WIRE HARNESS TO CORRECT THIS CONDITION. *TT
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2003 TOYOTA TUNDRA
TC-12-006
STRUCTURE:FRAME AND MEMBERS
LSC-9SM
FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:MOUNTING
LSC-9SM
STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS
5026
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
4573
POWER TRAIN:AUTOMATIC TRANSMISSION
4488
ENGINE AND ENGINE COOLING:ENGINE
4422
ENGINE AND ENGINE COOLING:ENGINE
04604
ENGINE AND ENGINE COOLING:ENGINE
01903
ENGINE AND ENGINE COOLING:ENGINE
BR00402
SERVICE BRAKES, HYDRAULIC