I am having a nightmare with my A4 B7 Avant S-line at the moment, if I leave the car for 2 days or more the battery is completely flat!! Its to the point now where I carry a power pack in the boot to jump start the car, and I'm having to use it regularly.
Today I decided to look into this, I got a multimeter and tested the alternator was charging, +14v when running, so happy with that, battery is less than 6months old so chances are that ok so it was time to investigate further.
I disconnected the negative lead and read the Amp usage across the circuit when the car is sat with nothing on and I'm getting 3A which seems way too much but I'm no expert, I went through the process of pulling fuses one by one until the Amps dropped, I pulled the fuse for the radio and hey presto the reading dropped to 0.95A which still seems high? I pull the rest of the fuses and it never dropped below 0.95A
I have a RNS-E plus and yanked it out the dash and sure enough when I pulled the plug out the back it dropped from 3A to 0.95A
It clear the problem is with the RNS-E unit, can this be fixed, is this common issue? as a temporary measure I have pulled the fuse for the radio and I'm going to see how the car is over the next week. If I drive it every day its usually ok but if left for that extra day then the battery is completely dead.
Please help me know what to do, I'm thinking about chopping this car in as it been nothing but trouble for me :-(
Today I decided to look into this, I got a multimeter and tested the alternator was charging, +14v when running, so happy with that, battery is less than 6months old so chances are that ok so it was time to investigate further.
I disconnected the negative lead and read the Amp usage across the circuit when the car is sat with nothing on and I'm getting 3A which seems way too much but I'm no expert, I went through the process of pulling fuses one by one until the Amps dropped, I pulled the fuse for the radio and hey presto the reading dropped to 0.95A which still seems high? I pull the rest of the fuses and it never dropped below 0.95A
I have a RNS-E plus and yanked it out the dash and sure enough when I pulled the plug out the back it dropped from 3A to 0.95A
It clear the problem is with the RNS-E unit, can this be fixed, is this common issue? as a temporary measure I have pulled the fuse for the radio and I'm going to see how the car is over the next week. If I drive it every day its usually ok but if left for that extra day then the battery is completely dead.
Please help me know what to do, I'm thinking about chopping this car in as it been nothing but trouble for me :-(