Checking voltages, LEDs and bulbs with test box (basic unit) V.A.G 1598/14 . — VW

Checking voltages, LEDs and bulbs with
test box (basic unit)
V.A.G 1598/14
.
Special tools and workshop equipment required
Test box with 9 adapters
V.A.G 1598/A
Adapter cable
V.A.G 1598/13
Voltage tester
V.A.G 1527 B
Hand multimeter
V.A.G 1526 B
Note
The bush markings on the
test box (basic unit)
V.A.G 1598/14
are identical with the contact markings on the dash panel insert.
If the specification is attained, check conductor strip with connectors and components.
In case of deviation from specification, check wiring harness according to current flow diagram.
Current flow diagrams, Electrical fault finding and Fitting locations
Note
Replace the dash panel wiring harness if it is found to be defective when the line positions are checked. The dash panel wiring harness must not be repaired.
Test prerequisites:
Battery voltage OK.
Affected fuses OK.
Current flow diagrams, Electrical fault finding and Fitting locations
1
Dash panel insert
2
Test box (basic unit)
V.A.G 1598/14
with connecting cable
3
4
Hand multimeter
V.A.G 1526 B
5
Adapter line
V.A.G 1598/8
6
Dash panel insert wiring harness
Fold down cover in front of relay plate.
Disconnect multi-pin connector behind dash panel insert
1
.
Connect
test box (basic unit)
V.A.G 1598/14
with
adapter line
V.A.G 1598/13
to dash panel insert and disconnected wiring harness (plug must audibly engage).
Test table:
Measuring range: Switch on voltage measurement
V
.
Test step
Bushes
V.A.G 1598
The voltage supply is tested
Test conditions
Additional operations
Specifications
1
11 + 3
Terminal 30/terminal 31
Ignition switched off
Approx. battery voltage
2
13 + 3
Terminal 15/terminal 31
Switch on ignition.
Approx. battery voltage
3
Note
22 + 3
Left turn signal warning lamp
Ignition switched on
Connect test lamp.
Switch on left turn signal.
Test lamp flashes
4
Note
24 + 3
Right turn signal warning lamp
Ignition switched on
Connect test lamp.
Switch on right turn signal.
Test lamp flashes
5
12 + 3
Illumination for dash panel insert and digital display
Ignition switched on
Switch on light switch.
Approx. 2.5 V to battery voltage, depending on position of controller E 20
6
25 + 3
Main beam warning lamp
Ignition switched on
Switch on high beam.
Approx. battery voltage
7
18 + 3
Dual circuit and handbrake system warning lamp
Ignition switched on
Apply handbrake.
Release handbrake.
Approx. battery voltage
approx. 0 V
approx. battery voltage
8
16 + 3
Alternator warning lamp
Ignition switched on
Start engine.
Approx. 0 V
approx. battery voltage
9
Note
13 + 20
Glow period indicator lamp
Engine cold (below glow temperature)
Switch on ignition.
Approx. battery voltage until glow temperature is attained
Use
test lamp
V.A.G 1527
Not possible with hot engine