Ford E450 chassis Electric Trouble

first thanks for the help. I've subscribed to alldatadiy.com for diagrams and diognostic help. there is voltage on either side of both links. the one that looks melted is in line directly to the altonator/generator.this has an additoinal small brown fusable link it's a 12amp as well. there is good voltage on either side of both circuts 12.7 with the eigine off 14.35 with it running. On my 2006 the starter relay is a component in the battery junction box. the diagram you have is acurate. the line in yellow runs under the battery tray where the yellow fusable links are and up between the top of the radiator and it's support and across to the battery junction box. there is the same voltage at the battery junction box as noted above and when test with a simple Ohm meter there is no resistance or the circuit is open. The fuses in the battery junction box show the same voltage as noted with the exception that some fuses are not supposed to be hot unless the engnine is running or ingnition is to accy.
I'm about to test the voltage on the fuses at the central junction box which is at the drives feet. i had already looked at all of these fuses and they were good.
I looked all over for a ring terminal with no wire, but since the starter relay is a component in the junction box I'm not sure it applies.
Again thanks for your help.