Page 445 - Foton Workshop Manual - Auman EST-M

Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts DI - 391

Failure phenomenon Phenomenon description IN

With the ignition switch at "ON" position, the horn doesn't
Horn no sound DI
sound after the horn switch is pressed.

Diagnosis procedure
EG
1. Check the cigar lighter fuse

a. Ignition switch: LOCK.
TR
b. Open the body harness fuse box cover.

c. Remove the horn fuseF33(7.5A).
AX
Caution

Dismount the fuse with a special fuse remover. Do not pull it out directly with hands, which may
FR
damage the fuse.

d. Check the middle fuse of horn fuse F33 (7.5A) is broken. ST

Disconnect Normal

BR

BW

EL

Check if the fuse is broken

Yes>replace with the same spec fuse

NO>go to Step 2.

2. Check the horn relay

a. Ignition switch: LOCK.

b. Disconnect the relay R04 of horn and check the conduction with a multimeter.

c. Measure the conduction between No.30 and 87a terminals

of horn relay R04 with a multimeter.

Standard resistance:

Storage battery voltage Standard value

Do not apply voltage on relay
About 0Ω
85 and Terminal 86

DI-391