System 11 MPU / Driver is all one board. The issue with your JET rollover lamps not changing along with the HS initial entry is all the same issue, which will be a problem with the optocouplers on the interconnect board. (I believe the part# is 4N25 and there should be 3 of them) You'll need the schematic to figure out which one is for what, but that is where you need to start looking. (bad traces / connectors slowly eliminating these things until you're left with just the 4N25)
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