the ford electrics is a 4 day coarse so to explane it all here may take a while...
basicly the daigram flows down with the power(fuses)at the top ending with a earth point (a G number)at the bottom. components are labled with a A number(surronded by a dashed line) connectors are labled with a c number(the single number-next to it- refers to the pin number within the connector)spliced wiring coming off them are labled S numbers
next to every wire(on the left)should say (something like)31S-AC3A while on the right should say1.5BK/RD the 1st 2digits are the function code(the S means its additonally switched)after the dash- comes the system to which the wiring relates to(3 means its a switch connection,A means its a branch wire the numbers on the right are easy, size of the wire (in this case
1.5mm2)then the colour 1st the basic colour(in this case black)then the identificatiion colour(in this case a red stripe) FUNCTION CODES
7 DC voltage supplied at all times
8 sensor signal
9 sensor signal return (reference/grond)
14 voltage supplied in start and run (overload protected)
15 voltage, ignition in start or run(not overload protected)
29 voltage supplied at all times(overload protected)
30 voltage supplied at all times(not protected)
31 ground
49 pulsed power feed (overload protected)
50 voltage,igition switch in start(not protected)
59 AC power
63 variable DC voltage (overload protected)
64 variable DC voltage (not protected)
74 votage in run or accessory(overload protected)
75 voltage:ignition switch in accessory or run
89 voltage supplied at all times (overload protected electronic module)
90 voltage supplied at all times (not protected electronic module)
91 ground
94 voltage, ignition switch in start or run (overload protected eletronic module)
95 voltage, ignition switch in start or run (not protected electronic module) COLOUR CODES BK BLACK BN BROWN BU BLUE GR GREEN GY GRAY LG LIGHT GREEN OG ORANGE PK PINK RD RED SR SILVER VT VIOLET WH WHITE YE YELLOW
hope this helps davey