The 4 wheel drive light will do this most often if you try to switch into 4wheel low at a high speed, usually over 35 MPH. 4 wheel low is made mainly for when you are stuck and or when in mud or snow. If the question was for 4 wheel high. Stop the car press the button and it should stay on without blinking. If you suspect that it is not going into 4 wheel high or low. The valve unit that engages the gear may be the problem. Front underside of the transmission, has wires coming out of it.
Regita love Marie-Claire
Press the 4WD button.
check and make sure it contacts, theres not much room behind that button and any play may cause it not to connect, push the dash assembly around the button firmly with one hand and push the button with the other, does it light up and engage
push the four wheel drive button on your dash, see owners manual
could be the 4 wheel drive module located behind the glove compartment. If you don"t hear a click when you press the button to engage the module isn't working.
the transfer case motor has to be replaced
there should be a button on your left of the steering wheel and if not, it doesn't have 4 wheel drive
It may have the original transfer case that was recalled
i wouldn't... blinking means its bad, mine came on the other day and i called the dealer to see if it was ok to drive and they told me if its solid drive it in, if its blinking tow it in.
Try checking the vacuum lines on the axle.
It could be the shift motor on the T Case. Or it could be the automatic shift button switch on the dash.
The 4 wheel drive system on a 2002 Land Rover Discovery is engaged by pressing the 4 wheel drive button on the dash. It sends an electrical signal which activates the system.