Canada - Trailer Harness - Updated Design/Diagnostics

Bulletin
1140

Issue Date
2002-11-15

Reference
EL-02-001

Model
4Runner, Highlander, RAV4, Sienna, Tacoma

Year Range
1996 ~ 2007

Market
Canada

Component
EL

Subject:
TRAILER WIRE HARNESS

Beginning in 2000, the accessory trailer wire harness supplier was changed and a new design was adopted which incorporated in-line fuses in the tow wire harness in addition to the vehicle fuse. This bulletin identifies the fuse location to supplement dealer diagnostics troubleshooting. In the future please reference the accessory trailer wire harness Owner's Guide for the vehicle specific diagnostic procedures. As a general note please place the towing wire harness Owner's Guide in glove box after every DIO installation.

APPLICABLE VEHICLES:
4Runner, Highlander, RAV4, Sienna, and Tacoma vehicles using the Accessory Towing Receiver Hitch and factory Towing Receiver Hitch option. (See table below for applicable model years.)







ACCESSORY WIRE HARNESS KIT INFORMATION:












WIRE HARNESS FUSE LOCATION:

TROUBLE SHOOTING PROCEDURE:
Perform the following procedure if there is any lamp malfunction.







CAUTION:
Ensure that lamp switch is OFF before taking measurements or checking.







TABLE 1: Rated Current for Sienna, Tacoma and RAV4

Perform the following procedure if there is any lamp malfunction.







CAUTION:
Ensure that lamp switch is OFF before taking measurements or checking.







TABLE 2: Rated Current for 4Runner & Highlander

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.