Page 446 - Foton Workshop Manual - Auman EST-M

DI - 392 Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts

d. Measure the conduction between No.30 and 87 terminals
of horn relay R04 with a multimeter.
Standard resistance:

Storage battery voltage Standard value

Battery positive pole connecting to
Terminal 85 and negative pole About 0Ω
connecting to Terminal 86

Check if the result is ok?
Yes>go to Step 3.

NO>repair or replace the horn relay.
3. Check the circuit from horn relay to horn switch

a. Ignition switch: LOCK.
b. Disconnect the connector B033 of horn switch.

c. Ignition switch: ON.
d. Take a multimeter voltage gear to measure the voltage
between No. 1 terminal of B003 and grounding.
Standard voltage:

Multimeter connecting terminal Standard value

B033(1)- Grounding 0V

Check if the result is ok?
Yes>go to Step 4.
NO>repair or replace the harness.
4. Check the horn switch

a. Ignition switch: LOCK.
b. Disconnect the connector B033 of horn switch.

c. Check if the contact of horn switch can contact normally.
Check if the result is ok?
Yes>go to Step 5.
NO>repair or replace the horn switch.

DI-392