Hi all,
I am glad I found a community for this nice car. I have just introduced myself in that particular section.
My car is a 225bhp quattro roadster.
Have had the car for a month now, but after 2 weeks a problem occurred.
One morning all gauges simply did not work. No speedo, no rpm, no fuel, no temp.
All other items worked, all service lights, the LCD display etc.
Just only all gauges refused to start working.
I spend already a whole day in trying to find the problem and reading about it, so I really hope you can help me. This problem is very rare, and what I can find is that normally it means no power due to fuse or broken wire. But how is it possible that the rest of the cluster is fully working?
Info about the car:
What I am planning to do, and where my questions are:
- check pin nr 1 on the blue connector for voltage.
I understand that pin1 is the other side of the wire coming from fuse 15, so it should have 12.5V, correct?
Which pin is ground on the connector, is that pin 9 or 24 ? Or should I connect to the seat rails again?
Is the cluster switched on the ground wire, with one of those 2 pins? One permanent (pin 9) and one switched by the ignition (pin 24 ) ?
I read somewhere the cluster operates on 5V, so where is the resistence/part that reduces the voltage form 12.5 to 5V? On the print board of the cluster?
Does it sound logical that this part has failed?
If I remove the fuse , the fuel gauge sinks from empty to off the scale empty. If I refit it, and turn on the ignition, the fuel gauge hand returns to just empty. Tank is full with 480 km to go according to the DIS.
I hope there is somebody who can point me in the right direction...thanks in advance!!
I am glad I found a community for this nice car. I have just introduced myself in that particular section.
My car is a 225bhp quattro roadster.
Have had the car for a month now, but after 2 weeks a problem occurred.
One morning all gauges simply did not work. No speedo, no rpm, no fuel, no temp.
All other items worked, all service lights, the LCD display etc.
Just only all gauges refused to start working.
I spend already a whole day in trying to find the problem and reading about it, so I really hope you can help me. This problem is very rare, and what I can find is that normally it means no power due to fuse or broken wire. But how is it possible that the rest of the cluster is fully working?
Info about the car:
- LCD (DIS) has been replaced before, according to previous owner, and is fully working.
- Battery was replaced literally a day before collection a month ago. Is showing 12.25 in rest on DVOM. Is a 27n 60Ah.
- Alternator has been replaced a year ago. 20C trick shows 12.0V engine off, 14.2V engine on.
- of course both the fuses have been checked, connected to seat rail for ground even shows 12.5V engine off.
- I have removed and opened the cluster to look for traces of burnt parts or cracked solder joints, none found.
- I even purchased a spare cluster for 100 euro (cheap), but that turns out to be a 2 connector type. So only good for parts for me.
What I am planning to do, and where my questions are:
- check pin nr 1 on the blue connector for voltage.
I understand that pin1 is the other side of the wire coming from fuse 15, so it should have 12.5V, correct?
Which pin is ground on the connector, is that pin 9 or 24 ? Or should I connect to the seat rails again?
Is the cluster switched on the ground wire, with one of those 2 pins? One permanent (pin 9) and one switched by the ignition (pin 24 ) ?
I read somewhere the cluster operates on 5V, so where is the resistence/part that reduces the voltage form 12.5 to 5V? On the print board of the cluster?
Does it sound logical that this part has failed?
If I remove the fuse , the fuel gauge sinks from empty to off the scale empty. If I refit it, and turn on the ignition, the fuel gauge hand returns to just empty. Tank is full with 480 km to go according to the DIS.
I hope there is somebody who can point me in the right direction...thanks in advance!!
