Location of change over relay on Topaz

Frederic should be able to confirm, as he has the same model and similar year, but I ~think~ this part of a Topaz is the same as a Trooper. If that's correct, the two fuses and relay should be under the battery cover at the right hand end of the engine bay, attached to the back of the bonnet slam panel.

If my experience is anything to go by, there are really only two types - the cheap Chinese copies available on Ebay for about £12, or the VW originals from a dealer or TPS (which if you're not aware is the VW owned VAG parts supplier to the trade). Last time I looked the originals were ~£30.

The copies are not fantastic, but workable. The one that I bought had rather pronounced moulding ridges, and I had to trim down a bit, but I think it's been on around 4 years and still working Ok. I re-used the original seal, as it was better quality than the one on the copy.

The two fixing screws are inside - probably under the interior trim on a Topaz.

Be warned - there is one error that you can make that is really annoying. If you push too hard on the fixing screw as you fix the new one, you can displace the spring clip on the inside, and the screw then just turns without tightening! As I found out the hard way, it's not very easy to fix if you do that...