Expert: Mike Evans - 5/23/2010

Question
Tail lights aren't working right replaced bulbs and thought was ok.  Last week got a ticket for not having any tail lights. If
I move bulb sometimes it will work but unpredictable when it won't be.  Could it be the holders or electrical?  thanks Roz

Answer
    Most likely you have a bad socket.  Or, the grease in the socket has hardened and is interfering with the connection.  I would clean the socket thoroughly with electrical contact cleaner, dip the bulb in fresh white grease, and reinsert it.  that should take care of the problem.  There may be an electrical problem further upstream, but it is unlikely.