Depending on the vehicle, the 4wd could be coming on and off. The flashing could also be a code warning. Searching for the specific vehicle may give more specific answers.
The overdrive off light flashing - indicates a malfunction has been detected
transit van dashboard lights flashing on and off and van not starting
An engine cylinder misfire has been detected if your check engine light is flashing on and off
A flashing (blinking on and off) orange light indicates that the battery charge is low.
When stopped or < 3 MPH push the 4WD button again and the gree light should go off and put you in 2WD.
if it keeps flashing on and off
a malfuntion has been detected
= Service Engine Soon flashing light and Trac Off light on =
A flashing over drive off light indicates that a malfunction has been detected with the transmission - get it checked out by a professional as soon as possible
Try clickin on the light/turn off/this light
od light flashing on 1997 mercury montoneer
No. It releases a form of energy, but does not give off heat.