Defrost problem, can't find the timer to check

From the diagram on the back of the fridge, it says it’s a 7hr 35 min refrigeration,25 min defrost cycle defrost timer with red/orange/brown/white wires but just don’t know where it is located?! Help!( Heater & thermostat seems OK.)

Can’t get anything pulled up on the model number you provided. But, the timer should be in the plastic housing that has the cold control(thermostat), lite bulb area. Should be 4 screws to remove and drop down. If it isn’t in there…

Pull the dust grill off the bottom of the fridge, and see if you see it there.

Timer is not under the grill or the cold control area. Here is a link to the photos of the fridge if that might help: http://photoshare.shaw.ca/view/21819436508-1264120960-69389/ Thanks!