A printhead assembly is provided comprising at least two elongate modules interconnected so as to extend the width of media to be printed on by the printhead assembly and a plurality of printhead integrated circuits arranged on or in each of the modules so as to extend the width of the media. Conventional cable diagnostics such as time domain reflectometry can be used to determine cable length. The first bridging assembly may include first and second resistors, and third, fourth, fifth, and sixth conductors. At least one respective brake actuator is isolated from receiving pressurized brake fluid for increasing the flow of pressurized brake fluid to a non-isolated wheel of the brake circuit in response to the normal force parameters.