Hope you lot can offer some help...

I've got a vectra VXR. Had some warning lights come on earlier, which I thought was fixed

Every now and again my traction control, abs and IDS light come on all at the one time. It could be as soon as I start the car up, or at any point in a journey.

The last time this occurred I thought I'd found a loose connector in the passenger side wheel arch (a connector block with 3 connectors). Tightened that up in the past and it appeared the problem had been solved.

That was about a 2 month ago, and now the problem has reappeared. I've checked the connectors again and they seem fine. Not sure if it's a coincidence, but the passenger side bearing was replaced at the end of last year.

Anyone got any ideas?