Introduction to the Cable Harness Routing Problem Cable Harness Routing Problem (CHRP) Introduction. Cable Harnesses are used in domains where more than two locations are to be electrically connected. The cable harness, shown below, consists of three components: bundles, ports, and transitons. The problem itself can be viewed as a routing, topology, and connectivity problem.[PDF] TT EL962 Wire Harness Routing - wwwtheframeup EL962 - TC WIRE HARNESS ROUTING The following photos are in sequence to show the routing of the TC wire harness. Note: Photos are from a TC EXU. Primary harness routing remains the same for all models. (End application will differ for horn, foglamp, and tail light) 1 & 2 – The main harness enter the left rail and splits fore and aft.