Nissan Repair: Front Turn Signals, turn signal switch, hazard flashers

Question
I have a 1995 Nissan Altima GXE.  The front turn signals/hazard flashers do not work but the rear turn signals/hazard flashers do work.  I have replaced the bulbs and the turn signal switch assembly (on the steering column) and checked all the fuses and relays I could find under the dash and in the engine compartment.  However, there were no obvious fusible links in the engine compartment.  I have not found any obvious shorts.  Any ideas on what to check next.

Answer
Robert,

Either the grounds are bad and need to be checked or you have sockets that are corroded or the harness has been compromised.  I know it is not what you want to hear.  But, you will need to trace the harness at the column out the firewall and to the lights to see where the break is.  A test light with a point to probe the wire is the best way to check the wiring.  A Hanyes Manual or a Factory Service Manual to get the schematic for wire colors alwo helps.