Piers, Thank you so much for your post, re, all electrics cutting out. The same happened to me a few days ago, & again this morning. Thinking it was a faulty relay, I was dreading the bill for finding the fault, on my RX300. Then I remembered your post, & tried it. Blow me down the connector moved when I grabbed hold of it. I couldn't believe it, as I only had the battery off 2 weeks ago, & has cured fault. Thank you again, & it shows how vulnerable the average person could be, with an unscrupulous mechanic.
Ian Verdon.