electric problem

[Yuval Kaganovich]

What problem are you trying to fix? If the car is working fine and no errors then dont worry about it.

I have a strong sound system that pull 100-200 amp
The voltage is drop to 11.5 on drive when the alternator is on the voltage is 13.0 min

 

[Walone]

I have a strong sound system that pull 100-200 amp
The voltage is drop to 11.5 on drive when the alternator is on the voltage is 13.0 min

I would recommend a second battery just for the Amplifier/hifi system.

 

[LouG]

Take the voltage from the battery itself. There are some very strange terminals in the Leon fusebox. One shows 0 volts until a load is on it, even with the car off.

 

[BoomerBoom]

The sound system exceeds the output of the alternator, so the battery will be discharged due to the volt drop.

The readings you've taken are the energy recovery system working, so the battery is receiving a full charge voltage when throttle is off and the vehicle is slowing but only a trickle charge when open and the car is accelerating.

I'd recommend a weaker sound system, it'll save your hearing as well.

 

[matthab]

I would either put a second battery or take readings off the battery direct. As mentioned above modern cars have a lot of alternator management to save fuel etc.

To be honestly I wouldn't feel comfortable pulling that kind of load off my main battery.