Disconnect the negative (-) battery terminal.
Remove the junction box.
Check for continuity between the terminals.
There should be continuity between the No.5 in the I/P-J and No.18 terminals in the I/P-D when power and ground are connected to the No.2 terminal in the I/P-C and No.9 terminal in the I/P-J.
There should be no continuity between the No.5 terminal in the I/P-J and No.18 terminal in the I/P-D when power is disconnected.
There should be continuity between the No.5 terminal in the I/P-J and No.7 terminal in the I/P-K when power and ground are connected to the No.2 terminal in the I/P-C and No.1 terminal in the I/P-K.
There should be no continuity between the No.5 terminal in the I/P-J and No.7 terminal in the I/P-D when power is disconnected.