Tachometer

f<lVIndicator Warning Lamps:Tachometer Unit:

WIRING DIAGRAM

Indicator And Warning Lamp: Component Location:

COMPONENT LOCATION VIEW

Indicator And Warning Lamp: Component ID:

COMPONENT ID
10 Lights switch on dashboard between steering wheel and driver's door.
16 Rheostat, lighting for controls, on dashboard between the steering wheel and driver's door.
23 Flasher relay, on the relay board behind the glove box.

In The Main Instrument Display Panel
18 Instrument lighting
47H Indicator lamp, left-hand direction indicators.
47V Indicator lamp, lights on (EU).
47X TCS (anti-spin) indicator lamp.
110 Tachometer (rev counter)
159 Distribution terminal (+15 circuit) in main fuse box behind the glove box.
213 Pictogram, in the main instrument display panel.
289 Anti-theft alarm control module, on the right-hand side below the dashboard behind the knee shield.
382 ABS-TC control module on the battery tray
430 Saab Trionic control module, in engine bay on the left behind the bulkhead partition.
507 TCS V6 control module, under the left-hand front seat.
510 Motronic 2.8.1 control module, in the engine bay behind the bulkhead partition.

70-Pin Connector
H70-1 In the engine bay, behind the bulkhead partition.

Grounding Points
G8 Grounding point, dashboard, by the left-hand front loudspeaker socket.

DESCRIPTION OF OPERATION
Tachometer (rev counter) 110
Tachometer 110 in main instrument display panel 47 is supplied with current via fuse 13 and pin 1. The control pulses needed by the tachometer to show engine rpm are obtained from control module 430 or 510 via pin 2 The tachometer is connected to ground via pin 6.

Instrument Lighting 18
Background lighting. of the instruments is controlled from rheostat 16 (lighting for controls) via pin 5 and the lamps are connected to ground via pin 6.

Indicator Lamp 47H
The indicator lamp for the left-hand direction indicators is controlled from flasher relay 23 via pin 3 and connected to ground via pin 6.

Indicator Lamp, Lights on, 47V
An indicator lamp that shows when the parking lights are on is fitted on cars for certain markets.

With the ignition switch in the Drive position, current is supplied via lights switch 10 to pin 5 and to one of the poles on 47V. The lamp's other pole is connected to ground via pin 6.

Indicator Lamp 47X
The lamp is supplied with positive current on pin 1 via fuse 13. When pin 4 of the lamp is grounded, either via ABS-TC control module 382 or TTS control module 507, the lamp lights up.

FAULT DIAGNOSIS HINTS
1. Check that fuse 13 is intact and supplied with current.
2. Check the connectors, wiring harness and ground connections.

The lights-on indicator lamp is activated when lights switch 10 is turned to position 1 or 2.
1. Check that the lights switch is supplied with current.
2. Check that the bulb is OK and that current is supplied to the card for the warning and indicator lamps and also to the tachometer.
3. Check the connectors, wiring harness and ground connections.