Another ignition question. Since my Renesis has four coils and one of the
respondents to my past questions mentioned setting one VRS at 20 and another
at 27 degrees BTDC, How would it work out to have an on/off switch on the 27
degree VRS with a separate EDIS-4 controler to the trailing plugs and turn
it on after the engine is started, thereby running the engine with the lead
and trailing plugs 7 degrees apart.

Since the color coded plug wires are different to the VRS and EDIS-4, how do
you determine the positive and negative wires out of the VRS ? (The
schematic shows a + and a - )
 Karibian