One problem related to underhood wiring has been reported for the 2005 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Ford Focus based on all problems reported for the 2005 Focus.
2005 Ford Focus station wagon- loss of tail lights, high mount stop light, dash lights, running lights due to short in liftgate wiring. The wiring harness in the liftgate fatigues at the bend area. Wires break, resulting in a open or short which blows fuse. The blown fuse results in no high mount stop light, running lights, tail lights, and instrument lights. In addition the heated rear defrost and windshield wiper also fail. The harness must be replaced to fix the problem. This issue was part of a recall in 2000- NHTSA campaign id number 00v411000. My car is a 2005. The problem was never fixed in production.