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Ahhh great, thanks Stephen_G! It's not quite the answer I was expecting, as I was imagining it as a clip from an old hit single. This explains why I couldn't actually identify it: I never watched Knight Rider, so the theme tune wasn't known to me. I actually heard it again on Friday night, during the ad break at 23:49 on More4 in the film Watchmen, and came here to post this information so that anyone so minded (and with time to spare - you can't scroll through the adverts, you just have to sit them out!) could go to Channel 4's 4oD service and hear it for themselves. But now I don't need to do that... though I just have...
One thing has struck me on listening to it again on your YT video link: I now realise that it sounds less like the bands I expected, and more like a cross between Gary Numan and Hot Chip. Niiice!! ATB for '14.