Probably a faulty sensor or connection.
Most common cause of the turn signals not flashing is a defective flasher relay. Replace it.
There's a TSB on this problem.
rear window defroster light keeps flashing
I cannot answer this question without knowing the year of the vehicle.
It involves reprogramming the computer with new software.
It is possible that the dome light needs to be replaced on the Dodge Neon if the odometer is flashing the word fuse. If the car is also not starting this could be caused by a bad starter or bad battery.
you need to have the engine tuned on a machine by the mechanic, the timing could need reset. Also, Dodge Magnums have an anti-slip mechanism which if engaged, cause this sort of lag. There's a button on the dash you can disable this feature with.
See related question below
The starter has probably failed.
alarm arming light
A flashing check engine light is an indication of an engine misfire.
torque converter lock out engaged.