fk performance boost gauge help

have a boost gauge fitted in the pod i bought
http://www.fk-automotive.org.uk/websale7/FK-Performance-Gauges-series-24.htm?Ctx={ver%2f7%2fver}{st%2f3eb%2fst}{cmd%2f0%2fcmd}{m%2fwebsale%2fm}{s%2ffk-automotive%2fs}{l%2fEnglish%2fl}{mi%2f38-2100%2fmi}{pi%2f6402848%2fpi}{po%2f1%2fpo}{fc%2fx%2ffc}{p1%2f6116aa7301e75e1bde469e7b7fc38f13%2fp1}{md5%2fd40a55d05be9f758c940efbb0c0f70aa%2fmd5}

tried to wire it up tonight and it lights up but stays at the 2.0 bar boost position constant when ignition is on
we think we may be short a cable as there is space for a 3rd plug connector on the back of the gauge
anybody have any experience with these gauges
instructions supplied dont make mention of a 3rd plug connector
lad i bought them of isnt sure either as he never had them working in his car just lit up
i have emailed the company to see if they can tell me
any help appreciated a long shot but tought i would post up and see
thanks

Have one Colm and theres only one word to describe it ORNIMENTAL ok two SHITE!!!! :grin: Really hope my car boosts at more than .4 bar!!!!
Think the third plug is for connection to other gauges.

Thanks man
at least i know then im not short a wire
yeah i figured they weren't any use but they will do in the pod for the moment
have a lamco on the steering column witch should be accurate
try and get it sorted tomorrow night
Karma on the way for ya