2002 Cadillac dts,radiator cooling fans not working.

I would have the cooling fans checked. When the car is moving there is air forced through the radiator naturally. But when stopped, the car relies on the fans to pull air through the radiator to pull heat out of the coolant.

Engine Cooling Fan Relay 1
In the center front of the engine compartment, on the lower radiator support, near the cooling fans
Engine Cooling Fan Relay 2
In the center front of the engine compartment, on the lower radiator support, near the cooling fans
Engine Cooling Fan Relay 3
In the center front of the engine compartment, on the lower radiator support, near the cooling fans

The lighter it self is a coil they will burn out. very inexpensive to replace.
But if they all went out at the same time then that's a different issue

check the crackcase, or crankshaft circuits A or B.. or both..not sure.. which one. but i had similar problem,, i went and bought a code reader and that helped me out alot, with what i had to change.. good luck..

The cyl misfire is a clue. most likely you have head gasket leakage. Have a auto shop do a BLOCK-TEST it will test the cooling system for combustion gases.

You may want to check the fuse...DIC/RKE located in the fuse panel.

if the cooling system is full,it could be the thermostat or the cooling fan not working(fan motor,relay,coolant sending unit,bad connection)or the head gasket is no good or even the computer may not be turning the fan(s) on.when the motor overheats the cooling fan(s) should be running if not that may be the problem.you can have a block test done to see if the head gaskets are bad.chances are you haven`t changed the thermostat so it should be changed at any rate.by putting a scanner tool on it you may find the problem quickly.

sounds like your thermostat is stuck must replace it. at the end of your top radiator hose engine side is a thermostat housing remove it and thermostat is under it. make sure there is no pressure in the cooling system first.

check cooling fan sensor,which tell the fans to come on

2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. 4 Inspect Radiator Cap Worn or damaged radiator cap 5 Inspect Thermostat Thermostat stuck closed 6 Inspect Fan Blade Broken, missing, or defective fan blade(s). 8 Inspect Water Pump Damaged, worn or leaking water pump. 9 Inspect Intake Manifold Plenum - Perform Leaking water pump gasket. 10 Inspect Cooling Fan Control Faulty cooling fan control or circuit. 11 Inspect Cooling Fan Switch - Radiator Faulty radiator cooling fan switch or circuit. 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. 15 Inspect Ported Vacuum Switch Damaged, leaking, or faulty ported vacuum switch. 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders here is a list of things to check Shaun