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[RedRocket]

Honestly I am still confused what you are doing and why you have 2 CPU'S with only 4 sensors.

I believe he may have at some point incorrectly put one of the Rear RJ plugs into the F2 port(by mistake) & did a "Memorize" option & now the CPU Control Box thinks it has gone bad b/c there's no Sensor connected.

As he stated previously, he has 2 independent b/c the cables from the Rear were not long enough to reach the Front Control Box. Why he didn't just relocate the Front Control Box to somewhere in the middle of the cabin (under the Driver seat) so that Front & Rear sensors cables could both reach it isn't something that was considered, I guess.


Attention: @syrinx -
Would you be willing to start over again from the beginning by putting the Rear ALP system back to its original wiring connections from when your Errors were first starting.
1. Also, I would ask you to put "labels" (for R1,R2) marking EACH side of cable, put labels on each RJ "plug" connection at the Control Box.
2. Put labels(R1,R2) on each side of round "twist" connectors.
3. Put label on each Control Box port (R1,R2) to prevent using F1,F2,F3 by mistake.