Originally Posted by Kev

The Yamaha connectors are no good for sealling the terminals & most don't have seals, so it's of little use just renewing the terminals the fault will come back one day. If you really become stuck cut the Yamaha plus off, solder the wires together & heat shrink the wiring to seal the loom.

Or use one of super seal connectors

http://www.google.com.au/images?q=superseal+connectors&rls=com.microsoft:en-au:IE-SearchBox&oe=&redir_esc=&um=1&ie=UTF-8&source=univ&ei=73DcTIr1KZHcvQPKi4HzCQ&sa=X&oi=im age_result_group&ct=title&resnum=2&ved=0CDIQsAQwAQ &biw=1276&bih=878

http://www.vanline.com.au/VPDF/Superseal.pdf

Or MTA connectors

http://www.proquip.com.au/Product%20Pages/MTA/MTAConnectors.html