BE/Body Electrical System — Inspection of Theft Deterrent Horn Circuit., page 97

BODY ELECTRICAL SYSTEM — Theft Deterrent System
BE-97

L | INSPECTION OF THEFT DETERRENT HORN CIRCUIT.

Turn ignition switch off.

Is HAZ HORN fuse normal? → No → Replace fuse. Is operation normal? → No → Short circuit in wire harness between fuse and terminal 6 of computer.
↓ Yes
Fuse faulty.

THEFT DETERRENT HORN
↓
INSPECT THEFT DETERRENT HORN OPERATION
Disconnect connector from horn.
Is horn operation normal? (See page BE-109) → No → Replace theft deterrent horn.
↓ Yes

COMPUTER
↓
Disconnect computer connector and inspect connector on wire harness side as follows.
↓
INSPECT THEFT DETERRENT HORN CIRCUIT
Ground the terminal 6 and check that blow the theft deterrent horn. → No → Open circuit in theft deterrent horn circuit.
↓ Yes
Replace computer.