Page 345 - Foton Workshop Manual - Auman EST-M

Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts DI - 291

Failure phenomenon Phenomenon description IN

While turning the ignition switch to "ON" position and turning
DI
on the room lamp switch or open the door, all is normal except
The lamp in the cab is not on
that the room lamp is not lit. Take the front left room lamp as
an example. EG
Diagnosis procedure
1. Check the room lamp bulb. TR

a. Check whether the connector of room lamp gets loose or falls off.
AX
b. Dismantle the room lamp bulb.

c. The positive and negative poles of bulb are connected to
FR
the positive and negative poles of battery respectively.
Check if the bulb can be on.
ST

BR

BW
Check if the result is ok?
Yes>go to Step 2. EL

NO>replace with the same spec bulb.
2. Check the power circuit of front roof lamp.

a. Ignition switch: LOCK.

b. Disconnect the connector E005 of left front top lamp.
c. Ignition switch: ON.

d. Measure the voltage between the left front top lamp

connector E005 terminal 2 and the ground with the
multimeter in voltage gear.
Standard voltage:

Multimeter connecting terminal Standard value

E005(2)- Grounding Storage battery voltage

Check if the result is ok?

Yes>go to Step 3.
NO>repair or replace the open harness.

DI-291