A control system with aircraft harnessing for an aircraft, the control system comprising: a single effector Line-Replaceable Unit LRU, comprising a first connection port (241, 242, 243), a second connection port (241, 242, 243), a third connection port (241, 242, 243), and characterised by comprising a first interconnect wire (212, 213, 223) disposed internal to the effector LRU and internally connecting only the first connection port (241, 242, 243) with only the second connection port (241, 242, 243), a second interconnect wire (212, 213, 223) disposed internal to the effector LRU and internally connecting only the first connection port (241, 242, 243) with only the third connection port (241, 242, 243), and a third interconnect wire (212, 213, 223) disposed internal to the effector LRU and internally connecting only the second connection port (241, 242, 243) with only the third connection port (241, 242, 243); a first control LRU (210, 220, 230) connected using a first harnessing (211, 221, 231) to the effector LRU; a second control LRU (210, 220, 230) connected using a second harnessing (211, 221, 231) to the effector LRU; and a third control LRU (210, 220, 230) connected using a third harnessing (211, 221, 231) to the effector LRU, wherein the first control LRU (210, 220, 230) and the second control LRU (210, 220, 230) are configured to communicate using the first harnessing and the second harnessing and using only the first interconnect wire (212, 213, 223) internal to the effector LRU, the first control LRU (210, 220, 230) and the third control LRU (210, 220, 230) are configured to communicate using the first harnessing and the third harnessing and using only the second interconnect wire (212, 213, 223) internal to the effector LRU, and the second control LRU (210, 220, 230) and the third control LRU (210, 220, 230) are configured to communicate using the second harnessing and the third harnessing and using only the third interconnect wire (212, 213, 223) internal to the effector LRU,. a single effector Line-Replaceable Unit LRU, comprising a first connection port (241, 242, 243), a second connection port (241, 242, 243), a third connection port (241, 242, 243), and characterised by comprising a first interconnect wire (212, 213, 223) disposed internal to the effector LRU and internally connecting only the first connection port (241, 242, 243) with only the second connection port (241, 242, 243), a second interconnect wire (212, 213, 223) disposed internal to the effector LRU and internally connecting only the first connection port (241, 242, 243) with only the third connection port (241, 242, 243), and a third interconnect wire (212, 213, 223) disposed internal to the effector LRU and internally connecting only the second connection port (241, 242, 243) with only the third connection port (241, 242, 243); a first control LRU (210, 220, 230) connected using a first harnessing (211, 221, 231) to the effector LRU; a second control LRU (210, 220, 230) connected using a second harnessing (211, 221, 231) to the effector LRU; and a third control LRU (210, 220, 230) connected using a third harnessing (211, 221, 231) to the effector LRU, wherein the first control LRU (210, 220, 230) and the second control LRU (210, 220, 230) are configured to communicate using the first harnessing and the second harnessing and using only the first interconnect wire (212, 213, 223) internal to the effector LRU, the first control LRU (210, 220, 230) and the third control LRU (210, 220, 230) are configured to communicate using the first harnessing and the third harnessing and using only the second interconnect wire (212, 213, 223) internal to the effector LRU, and the second control LRU (210, 220, 230) and the third control LRU (210, 220, 230) are configured to communicate using the second harnessing and the third harnessing and using only the third interconnect wire (212, 213, 223) internal to the effector LRU,.