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Discussion Starter #1
I bought a 2006 Beetle 2.5 Hatch yesterday. So far I haven't found a way to brighten the dash lights to a reasonable level. The speedometer has very dim blue lighting even when it's turned up to the brightest level. However, the Trip/Odometer lights are very bright red. Is there a trick to making the blue lights brighter? (I searched this extensive and helpful forum but didn't find anything that seemed to address this specific problem.)
Thanks in advance for your help.
 

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You could swap out the fuses (s) for the cluster and see if that helps. I’m going to assume that the little roller switch is all the way to it’s brightest setting.

MKIV FUSE LIST

Top left to right by collum
1. Washer nozzle heaters, glove compartment light, memory seat control module (10A).
2. Turn signal lights (10A).

3. Fog light relay, instrument panel light dimmer switch (5A).
4. License plate light (5A).

5. Comfort system, cruise control, Climatronic, A/C, heated seat control modules, automatic day/night interior mirror, control module for multi-function steering wheel, control unit in steering wheel (7.5A).o,
6. Central locking system (5A).
7. Back-up lights, speedometer vehicle speed sensor (VSS) (10A).

8. Open
9. Anti-lock brake system (ABS) (5A).
10. Engine control module (ECM): gasoline engine (10A); diesel engine, Model Year 2000 > (5A).
11. Instrument cluster, shift lock solenoid (5A).

12. Data Link Connector (DLC) power supply (7.5A).
13. Brake tail lights (10A).
14. Interior lights, central locking system (10A).
15. Instrument cluster, transmission control module (TCM) (5A).

16. A/C clutch, after-run coolant pump (10A).
17. Open.
18. Headlight high beam, right (10A).
19. Headlight high beam, left (10A).
D
20. Headlight low beam, right (15A).
21. Headlight low beam, left (15A).
22. Parking lights right, side marker right (5A).
23. Parking lights left, side marker left (5A).

Bottom left to right
24. Windshield and rear window washer pump, windshield wiper motor (20A).
25. Fresh air blower, Climatronic, A/C (25A).
26. Rear window defogger (25A).
27. Motor for rear windshield wiper (15A).
28. Fuel pump (FP) (15A).
29. Engine control module (ECM) gasoline engine (15A); diesel engine (10A).
30. Power sunroof control module (20A).

31. Transmission control module (TCM) (20A).
32. Injectors: gasoline engine (10A); diesel engine (15A).
33. Headlight washer system (20A). Open
34. Engine control elements (10A).
35. 12 V power outlet (in luggage compartment) (30A).
36. Fog lights (15A).
37. Terminal (86S) on radio, Instrument cluster (10A).

38. Central locking system (with power windows), lugging age compartment light, remote/fuel tank door, motor to unlock rear lid (15A).
39. Emerggency flashers (15A).
40. Dual tone horn (20A).
41. Cigarette lighter (15A).
42. Radio (25A).
43. Engine control elements (10A).
44. Heated seats (15A).


Fuse arangements in fuse bracket/battery:
S162. Glow plugs (coolant) (50A).
S163. Fuel pump (FP) relay/glow plug relay (50A).
S164. Coolant fan control (FC) control module/coolant fan (40A).
S176. Relays panel interior (110A).
S177. Generator (GEN) (90 Amp.) (110A).
Generator (GEN) (120 Amp.) (150A).
S178. ABS (hydraulic pumps) (30A).
S179. ABS (30A).
S180. Coolant fan


Next I would ceck the alternator output with a multimeter, it should be right around 13.8-14.4v.

Check the battery also sitting in your driveway not running the batter should read 12.4-12.8v

Remove the battery and the tray that it sits in there are several grounds underneath clean those grounds make everything shiny.

A low or weak charging/battery system can cause weird problems with a vw. A cheap digital multimeter can be had a Walmart or Home Depot for less than $30, if you don’t already have one. You tube is a great place for a crash course in reading one.
 

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5 Posts
Discussion Starter #3
You could swap out the fuses (s) for the cluster and see if that helps. I’m going to assume that the little roller switch is all the way to it’s brightest setting.

MKIV FUSE LIST

Top left to right by collum
1. Washer nozzle heaters, glove compartment light, memory seat control module (10A).
2. Turn signal lights (10A).

3. Fog light relay, instrument panel light dimmer switch (5A).
4. License plate light (5A).

5. Comfort system, cruise control, Climatronic, A/C, heated seat control modules, automatic day/night interior mirror, control module for multi-function steering wheel, control unit in steering wheel (7.5A).o,
6. Central locking system (5A).
7. Back-up lights, speedometer vehicle speed sensor (VSS) (10A).

8. Open
9. Anti-lock brake system (ABS) (5A).
10. Engine control module (ECM): gasoline engine (10A); diesel engine, Model Year 2000 > (5A).
11. Instrument cluster, shift lock solenoid (5A).

12. Data Link Connector (DLC) power supply (7.5A).
13. Brake tail lights (10A).
14. Interior lights, central locking system (10A).
15. Instrument cluster, transmission control module (TCM) (5A).

16. A/C clutch, after-run coolant pump (10A).
17. Open.
18. Headlight high beam, right (10A).
19. Headlight high beam, left (10A).
D
20. Headlight low beam, right (15A).
21. Headlight low beam, left (15A).
22. Parking lights right, side marker right (5A).
23. Parking lights left, side marker left (5A).

Bottom left to right
24. Windshield and rear window washer pump, windshield wiper motor (20A).
25. Fresh air blower, Climatronic, A/C (25A).
26. Rear window defogger (25A).
27. Motor for rear windshield wiper (15A).
28. Fuel pump (FP) (15A).
29. Engine control module (ECM) gasoline engine (15A); diesel engine (10A).
30. Power sunroof control module (20A).

31. Transmission control module (TCM) (20A).
32. Injectors: gasoline engine (10A); diesel engine (15A).
33. Headlight washer system (20A). Open
34. Engine control elements (10A).
35. 12 V power outlet (in luggage compartment) (30A).
36. Fog lights (15A).
37. Terminal (86S) on radio, Instrument cluster (10A).

38. Central locking system (with power windows), lugging age compartment light, remote/fuel tank door, motor to unlock rear lid (15A).
39. Emerggency flashers (15A).
40. Dual tone horn (20A).
41. Cigarette lighter (15A).
42. Radio (25A).
43. Engine control elements (10A).
44. Heated seats (15A).


Fuse arangements in fuse bracket/battery:
S162. Glow plugs (coolant) (50A).
S163. Fuel pump (FP) relay/glow plug relay (50A).
S164. Coolant fan control (FC) control module/coolant fan (40A).
S176. Relays panel interior (110A).
S177. Generator (GEN) (90 Amp.) (110A).
Generator (GEN) (120 Amp.) (150A).
S178. ABS (hydraulic pumps) (30A).
S179. ABS (30A).
S180. Coolant fan


Next I would ceck the alternator output with a multimeter, it should be right around 13.8-14.4v.

Check the battery also sitting in your driveway not running the batter should read 12.4-12.8v

Remove the battery and the tray that it sits in there are several grounds underneath clean those grounds make everything shiny.

A low or weak charging/battery system can cause weird problems with a vw. A cheap digital multimeter can be had a Walmart or Home Depot for less than $30, if you don’t already have one. You tube is a great place for a crash course in reading one.

Thanks for your help JarHead. I better pick up some fuses and get started... hope it's just a fuse!
 
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