My install failed to work initially - it turned out that the tuner connector (on the sled) had been assembled incorrectly at the factory. The ground wire had been connected one position out, in the position which is intended to be empty.

We were rather worried about this for a while, but inspection of many other sleds in the office showed no repeat and this was taken to be a fluke construction mistake.

It's worth checking that this isn't the case with your sled - I don't have the correct connection details here, but I'll post them on Monday.

Rob