The Lotus Grand Tourers

It works but ..
Its lazier than a disadvantaged teenager

when I got the car it did not work at all ...blown fuse

so replaced this

earth?
relay ?

the skooshers do not work at all and do not trigger the wipers

Where best to start ?

I'd take a look at the connector onto the wiper delay module. The module looks after pretty much everything to do with your wipers but isn't the easiest thing to get to on top of the steering rack. If the connector is firm/ok then try another module (Mike@ Lotus Bits). You can just plug the replacement module in and leave it wrapped in foam tied in place with a tywrap (like I did) until the day you have the instrument binnacle out then you can bolt the module in place properly.

Hope this helps.