OK..The lower divertor has got me stumped.  Mainly because I cannot even find it?  The manual shows it in the top left hand corner of the ramp (near the horeshoe bit).
When I go through the diagnostics, when divertor high works no probs, divertor low (no noise nothing)....  I've spent the best part of an 1hr plus 


Is the divertor hi / low all part of the same mech?  The part numbers are identical from the manual.

Any help would be appreciated?