Disconnect the negative (-) battery terminal.
Remove the junction box.
Check for continuity between the terminals.
There should be continuity between the No.6 in the I/P-F and No.14 terminal in the I/P-D when power and ground are connected to the No.10 terminal in the I/P-E and No.2 terminal in the I/P-J.
There should be no continuity between the No.6 terminal in the I/P-F and No.14 terminal in the I/P-D when power is disconnected.