Unplug the ACC control module.
Undo the six screws securing the rear part to the facia. Undo the snap fasteners using a screwdriver.
Change the defective lamp.
Fit the plastic cover so that the cable ribbon between the control module and the panel cannot be damaged.
Screw the panel to the control module.
Secure the ACC control module in the car's facia.
Calibrate the ACC system by pressing the "AUTO" and "VENT" buttons at the same time.
Wiring diagram for all instruments and controls:
10 Lights switch on dashboard between steering wheel and driver's door.
16 Rheostat, lighting for instruments and controls, on dashboard between the steering wheel and driver's door.
18 Lighting, main instrument display panel on dashboard.
22a Fuse board behind the access panel in the glove box.
25 Switch, hazard flashers, beside centre air vent in dashboard.
47 Main instrument display panel, dashboard.
48 Cigarette lighter on the centre console beside the ashtray.
49 Clock in the centre of the dashboard.
88 Switch, extra fog lights, on dashboard between steering wheel and driver's door.
91 Lighting, selector lever indicator, beside the selector lever in the centre console.
116 Switch, electrically heated rear window, on control panel for heating and ventilation.
143 Switch, recirculation, on dashboard between the centre console and steering wheel.
148 Ashtray lighting, cigarette lighter on centre console.
154 Lighting, control panel for heating and ventilation on centre console.
161 Switch, rear fog lights, on dashboard between the steering wheel and driver's door.
169 A/C switch, on the dashboard between the centre console and steering wheel.
174 Relay, daylight driving lights, in main fuse box behind the glove box.
210 EDU trip computer in the main instrument display panel.
216 ACC control module in the middle of the dashboard.
241 SCC trip computer in the centre of the dashboard.
252D Rheostat, driver's seat heating pad, on dashboard between the steering wheel and centre console.
252P Rheostat, passenger's seat heating pad, on dashboard between the steering wheel and centre console.
267 (H10-3) Radio connector (10-pin) on the centre console beside the place reserved for the radio.
282 Switch, headlamp beam adjustment, on dashboard between the steering wheel and driver's door.
386 Switch unit, electric window lifts and electrically operated sunroof, on the centre console between the seats.
449 Switch, TCS ON/OFF, on the dashboard.
H1-4 Under the centre console beside the selector lever.
H2-17 Adjacent to the heater control panel.
G2 Grounding point on the battery tray.
G6 Grounding point, negative distribution terminal, in the main fuse box (22B) behind the glove box.
G8 Grounding point, dashboard, by the left-hand front loudspeaker socket.
G14 Grounding point, left-hand seat member, under the left-hand front seat.
G24 Grounding point, right-hand seat member, under the right-hand front seat.
DESCRIPTION OF OPERATION
Rheostat 16, which regulates the lighting for instruments and controls, incorporates an electronic unit.
The rheostat is supplied with current via fuse 29. Rheostat 16 is used for steplessly adjusting the brightness of the lighting of connected components by means of a PWM signal. The brightness of the rheostat lighting is also adjusted at the same time.
Current from pin 2 is supplied to the following components:
10 Lights switch
25 Switch, hazard flashers
116 Switch, electrically heated rear window
143 Switch, recirculation
148 Ashtray illumination, front
154 Lighting, heater controls
161 Switch, rear fog lights
169 A/C switch
216 Climate control unit
252D Rheostat, heating pad, driver's seat
252P Rheostat, heating pad, passenger's seat
Current is supplied from pin 3 of the rheostat to the following components:
91 Selector lever lamp
386 Switches, electric window lifts, electrically operated sunroof
Current is supplied from pin 5 of the rheostat to the following components:
18 Lighting, main instrument display panel 47
49/241 Clock or SCC trip computer
210 EDU trip computer
267 Radio, dial illumination
282 Headlamp beam adjustment switch
Current is supplied from pin 9 of the rheostat to the following components:
88/88a Switch, extra fog lights
449 Switch, TCS ON/OFF
There at least 3, mebe 4 Bulb varieties (shapes/sizes) From EDU, ACC gizmos to dash lights as well as each and every switch.
Osram was the OEM brand fitted.
Napa usually (used to?) carries the full Osram line and can supply All of them ...IF... the parts guy isn't lazy
Happily ALL are easily replaceable Once you get at them.
Some bulbs feature long pigtails which are wound onto plastic holders which one quarter turns to lock into place. IE; switch ones.
Eeuroparts.com Used to sell each and every one of these. May still.. dunno TBH.
But, being mounted / ready to go these aren't cheap.. Easy though.
They mostly feature led bulbs, but if you scroll down about 3/4 of the page you will find a selection of incandescent T3,T4 & T5 bulbs (with appropriate bases). One or the other of these 3 bulbs is the correct application for nearly every lamp shown in the diagram above. They are only $2 per bulb. Available in various colors - if you're so inclined: