New harness problem

Ended my vacation the other day and have spent som time in the garage.

What I need to know is how the power runs through the curcuit.
This is what I came up with.
Red thick wire from battery gives power to starter.
Red thin wire from battery gives power to the starter relay.
From there goes another red wire that feeds the ammeter and the black wire on the other side.
The black wire from the ammeter is spliced: the black one feeds the alternator One red which feeds ignition switch. One red with tracer which goes to the fuse block. One black with tracer feeds the lights switch.
Is this correct?

If so, the problem is near to an end. My ignition switch is bad. The red wire to switch has 12.8 V, the black is spliced in to a to two black ones and a pink. On of the black feeds the flasher with 12.8 V. The other black wire goes through the fuse block to the heater switch. And the pink one feeds the wiper switch with 12,8 V. BUT niether the yellow, brown nor the two blue with tracer gets feed from th connectors at the ignition swich.

Please bare with. I have had this problem soooo long and the more I try the worse it gets.