Toyota Tundra 2005 Service - Repair - Maintenance page 4139

Horn (Double Cab)
From Power Source System ( See Page 320 )
482
10A
HORN
3 1
HORN
Relay
5 2
7 2F 8 2H
B
1 1
H 7
Horn LH
2005 TOYOTA TUNDRA (EWD611U)
W- R
12 IA7
6 A
HR
B 9(A), B11(C)
Body ECU
H 8
Horn RH
HORN
21 C
6
C16
Combination
SW