Two problems related to turn signal have 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.
Turn signal stopped working. Removed rear tail lenses to replace all the bulb and found brake/turn signal socket fused to interior portion of tail lens inhibiting removal due to heat warpage. Will contact dealer for replacement sockets for right and left sides and lens replacement for right and left sides. This should be a recalled item due to hazard of no turn or brake light and poor design to allow bulb to produce enough heat to cause thermal reaction and possible fire hazard.
The left rear turn signal stopped working- the blown bulb indication was noticed by the fast flash signal on the dashboard indicator. When going to replace the bulb it was found that the upper socket for the turn signal socket is melted to the lens cover. The lens cover socket mounting hole was distorted by heat. Once the socket was removed the bulb was found not to be blown. The socket housing shows internal signs of heat damage -color change. The bulb was in position in the socket and the bulb base showed no sign of melting at the bulb contact points. It appears the heat was generated in the socket connection to the bulb base. There are multiple complaint of a similar finding on multiple years of the Ford Focus that were easily found with a internet search- Ford Focus melted socket. Purchasing replacement socket from dealer as this is a major personal safety issue.