Ihave a Volvo 850 TDI Estate. Recently it developed a problem where the headlamps and tail-lights do not turn off when the ignition is switched off and the key removed. This happens when the switch is set to OFF and FULL-ON. If I leave the switch in the middle position then the headlamps turn off but the tail-lights stay on brighter. It is draining the battery and I am having to remove the light switch to slow the battery drain.

So far I have replaced the light switch. This seemed to work for a couple of weeks before the problem started again. Since then I have replaced the Light Control Relay. This has not helped at all.

Suggestions of what to do next please.

Regards ... Gary