03-03-2014, 09:48 PM
Get someone with access to autodata to look up the wiring diagrams for you, or in haynes. Then it's a simple, if tedious, matter of cross-referencing everything to work out which wires need to join up and which you can get rid of. Might be the odd one you need to put a switch on or route somewhere else or something, but it's a pretty logical process.