[940volvoman]

I had this problem which I put up with for a long time,Volvo 940 1998.

In the end, following the advice of the helpful people on this forum, I added an extra battery positive and negative,together with an additional blue earth wire
at the alternator. I also replaced the diode pack within the alternator.

Together this helped a lot, but ultimately Mr Laird Scooby suggested that I upgrade the battery to the larger lead acid one fitted to the diesel models not the calcium types. The alternator cant handle it.

With an occasional top up from a battery maintainer things seem to have improved massively, although the discharge still occurs.The speakers in the boot emit a very quirt shhhhhhh sound when the car is switched off, but I have no idea what it is or why.Its now manageable,though

Hope this helps

Shaun