Dongfeng DFA1101GZ5AD6J-907. Manual — part 62

Electric and Instrument

EL-4

Fog light doesn't go on

Position light doesn't go on

Windshield and wiper

Trouble

Cause

Remedy

Fog light doesn't
go on

Fuse burnt
Earth line contacts not well
Bulb burns out
Fog light switch damages

Replace
Tighten
Replace
Replace

Trouble

Cause

Remedy

Position light
doesn't go no
when turn on the
fog light

Fog light switch damages
Bulb burns out

Replace
Replace

Position light
doesn't go on
when turn on the
signal light

Harness connecting is not firm
Combination switch circuit contacts not well
Combination switch damages

Check the connection
Connect
Repair or replace

Trouble

Cause

Remedy

Wiper doesn't operate

Fuse burnt
Circuit breaks or contacts not well
Wiper switch failed or contacts not well
Synchronous connecting board breaks away
Wiper arm's tightening bolt loosens
Wiper motor assembly failed
1.Internal coil burns out
2.Wiper motor overlade because of current over-
powering
(The rectifier is polluted, carbon, rotary bearing
is seized, wiper arm connect not well, motor
wears, constant speed gear fails)

Find out cause and replace fuse
Check and repair
Replace wiper switch
Check and repair
Tighten bolt
Check and repair wiper motor
assembly if necessary replace
parts

Motor creaks

The lube grease in the gearbox qualitative change

Replace lube grease

Wiping picture is not
correct

Wiper arm spring fatigue (pull force descends)
Wiper blade rubber damages

Replace wiper arm
Replace blade

The wiper can't return
to its original position
when turn off the
switch

Main guideline and contactor
Wilding is not good
The contactor has not good contact

Repair
Repair

Cam switch
The joint is not good

Repair or replace switch

Wiper doesn't stop

The contact is not good

Repair or replace switch

Electric and Instrument

EL-5

General Instruction

Constitution

Power supply division: Alternator, battery

Starting system

Power supply warning system

Instrument indicator system

Lighting system

Others: Wiper, horn, cigar lighter, radio cassette player

Features

Using integrated alternator

Using electromagnetic main power switch

Two fusible wires at starter

22-way fuse box

The complete truck wiring

The wires of 22-way fuse box of the complete truck are connected as follow

In the normal conditions, the output of alternator reaches ignition switch, lighting and instruments by the

way of two fusible wires. If the alternator fusible wires are burnt, the above systems will continue to operate using
the battery power. But if the engine stops at the time, the systems can't start until replace the fusible wires. The
fusible wire must be replaced immediately to prevent the battery from over discharging.

Bedsides the safety control described above, there are another 6 small relays: start relay, ignition relay, heater

relay, A/C relay, radiator relay, and horn relay.

Electric and Instrument

EL-6

Battery

Specifications

Check

1.Electrolyte density when fully charged: 1.26~1.285g/

cm³

①

Density meter

②

Floater

2.Fill distilled water in time if the electrolyte is found

insufficient. Charging for over half an hour after filling
in order to let the filled distilled water fully fix with the
former electrolyte.

Electrolyte level (above the top of the battery plate)

15~20mm

①

Battery plate ② Electrolyte

Battery

Two batteries 6-QW-90DF are in series

Type

Less maintenance

Nominal voltage (V)

12

Nominal capacity (A · h)

165

Electric and Instrument

EL-7

Alternator

Alternator operation principle diagram

Specification

Construction Principle

Features

Improve the magnetic circuit and use 8-diode rectifier to increase the output power.

Construction without brush to make it simplified, and ease of servicing

Use the alternator with built-in rectifier and electric regulator.

Operation principle

The alternator produces self-excitation field and operates normally when the charging indicator lamp is

extinguished.

Vehicle model

DFA1101GZ5AD6J-907

Nominal voltage (V)

28

Adjusting voltage (V)

28 ± 0.3

Nominal current (A)

45

Nominal revolution （r/min）

6000

Starting revolution （r/min）

＜

1150

Output current (A)

18-20

1.Battery
2.Electric using equipment

3.Charging indicator
4.Regulator