harness vs jumper cable

harness

noun
  • A collection of wires or cables bundled and routed according to their function. 

  • A restraint or support, especially one consisting of a loop or network of rope or straps. 

  • The part of a loom comprising the heddles, with their means of support and motion, by which the threads of the warp are alternately raised and depressed for the passage of the shuttle. 

  • Equipment for any kind of labour. 

verb
  • To equip with armour. 

  • To place a harness on something; to tie up or restrain. 

  • To capture, control or put to use. 

jumper cable

noun
  • An electrical cable providing a connection between rail or road vehicles. 

  • A pair of insulated electrical wires with alligator clips at each end used to jump-start a car with a dead (flat) battery. 

How often have the words harness and jumper cable occurred in a corpus of books? (source: Google Ngram Viewer )