Vehicle RF power requirements must be defined at the equipment terminals, not only at the battery or distribution unit. State nominal and continuous range, source impedance, harness resistance and inductance, inrush, crank or brownout when applicable, interruption, ripple, surge, load dump or switching transient, reverse polarity, sequencing, hold-up, fault energy and recovery. Identify whether the hardware must survive, continue operating or retain RF performance during each event.
Draw functional supply and return, signal common, cable shield, enclosure and chassis bond separately. Show where they join, shield termination at each end, backshell and feedthrough treatment, antenna-base bond, enclosure seams and protection-device return path. Specify materials, finish, contact preparation, fastener, torque, corrosion protection and a measured bond limit appropriate to the frequency range. A low DC resistance value alone may not establish RF bonding performance.
Test with a representative power source and harness, loads, grounding, enclosure, cables and operating state. Measure terminal waveform, current, resets, data integrity, RF gain or output, noise and recovery while applying the declared event. Retain test-point locations, source and coupling network, cable configuration, bond measurements, instrument uncertainty, raw traces and article identity so later harness or protection changes can be assessed.