Being an intermittent problem, it is not easy to pinpoint the fault and it could be any of the following
1. Bulbs, somtimes they have internal fault and would take some heating up to cause it to blow.
2. Wires, some could be exposed and is vibration causes it to be gounded.
3. The flasher relay could be faulty. The unit is located behind the dash, right of steering and sorry I do not have any diagrams to show you.
Check if any of the bulbs seems not as bright as the others, that would mean a high resistance and possible cause for shorting.
I could not find any Technical Service Bulletins regarding this so it means it is not a known problem and you might need to try checking the buls or replacing the flasher unit to test.
Tuesday, December 23rd, 2008 AT 2:59 PM