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6 Posts
Hello.
I'm experiencing a battery drain on my 2000 Golf 4 1,9 TDI.
The other day, the car started just fine and ran like normal. It was a 35 minutes drive home, where I left it parked. The next morning the car was completely dead - no central locking, no interior lights or dashboard lights, no ignition.. I went to work via public transportation but when I got home in the afternoon I measured the voltage across the battery to 0,2V! No wonder it seemed dead..
About 17 hours had passed from when I parked the car until I tried to start it in the morning. The battery is a 66 Ah battery so to drain the battery in 17 hours there must have been a power draw of at least around 4 Amps?
After recharging the battery for around 8 hours, I installed it in the car and after some debugging with measuring voltages and currents in different places, I have found that the fuse "S180" in the box on top of the battery, has a voltage across it of 8-9 mV. This is with all doors closed and locked, no ignition or anything.
The S180 is a green 30 amp fuse and used for the "Coolant Fan" - it is part of a 3-wire plug. Using some "Fuse Voltage Drop Charts" I have found on some Golf 4 troubleshooting searching, I can read that a 8-9 mV drop across this particular 30 amp fuse equals a current of 4-4,5 Amps?
I have tried taking out this S180 fuse and I then measure a current flow of 50-60 mA across the whole system, which is acceptable I would say? So it seems that this fuse is delivering the power to the drain as it is gone when I pull it out?
I have read several places that the S180 fuse is for the "Coolant Fan" - does this mean the fans on the radiator (both large and small)? Does it have anything to do with the airconditioning?
Does anyone have a diagram of where the S180 fuse goes? I have a suspicion that it goes to a "Fan Control Module" sitting under the battery tray somewhere? I haven't had time to get under the car to look where the wire goes..
Oh, and the fans are not spinning..
Thanks in advance for any help,
Nicklas
I'm experiencing a battery drain on my 2000 Golf 4 1,9 TDI.
The other day, the car started just fine and ran like normal. It was a 35 minutes drive home, where I left it parked. The next morning the car was completely dead - no central locking, no interior lights or dashboard lights, no ignition.. I went to work via public transportation but when I got home in the afternoon I measured the voltage across the battery to 0,2V! No wonder it seemed dead..
About 17 hours had passed from when I parked the car until I tried to start it in the morning. The battery is a 66 Ah battery so to drain the battery in 17 hours there must have been a power draw of at least around 4 Amps?
After recharging the battery for around 8 hours, I installed it in the car and after some debugging with measuring voltages and currents in different places, I have found that the fuse "S180" in the box on top of the battery, has a voltage across it of 8-9 mV. This is with all doors closed and locked, no ignition or anything.
The S180 is a green 30 amp fuse and used for the "Coolant Fan" - it is part of a 3-wire plug. Using some "Fuse Voltage Drop Charts" I have found on some Golf 4 troubleshooting searching, I can read that a 8-9 mV drop across this particular 30 amp fuse equals a current of 4-4,5 Amps?
I have tried taking out this S180 fuse and I then measure a current flow of 50-60 mA across the whole system, which is acceptable I would say? So it seems that this fuse is delivering the power to the drain as it is gone when I pull it out?
I have read several places that the S180 fuse is for the "Coolant Fan" - does this mean the fans on the radiator (both large and small)? Does it have anything to do with the airconditioning?
Does anyone have a diagram of where the S180 fuse goes? I have a suspicion that it goes to a "Fan Control Module" sitting under the battery tray somewhere? I haven't had time to get under the car to look where the wire goes..
Oh, and the fans are not spinning..
Thanks in advance for any help,
Nicklas
