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Sometimes, they come under the engine or in the back top. Hard to see because of the transmission. A few cars have a sticker in the truck, under the carpeting that has the engine and transmission codes on them.
Grounds are very important in these vehicles. Usually, the ground will go from the battery through a thick cable to the engine. There will also usually be a smaller wire going from the ground on the battery to one of the fenders. There will then be several ground wires going from the engine to various points on the chassis. An example would be a ground wire going from the back of the cylinder head to the firewall. Chrysler's use a system to energize critical engine components through the ASD or Automatic Shutdown Relay. In this system, power is sent to important components like fuel injectors, ignition coils and fuel pumps at all times via the ignition switch, relays and fuses. The computer then makes or breaks the grounds based off of data from various sensors. A faulty ground to the computer, battery, frame or chassis could easily result in a no start condition. Make sure all grounds are connected as required and are free of corrosion. Running extra ground wires from the battery to the engine and chassis can always help things as well.
All newer models have electric fans,you have sensors and relays that tell the fan to turn on and off,you can test if your fan is dead or your sensor or relay.from your fan follow wire until you find a connection plug,usually about 20 inches from fan. disconnect plug and run two jumper wires to your battery. this will tell you if fan is problem. continue following wires to find sensor, use test light when engine is running and getting hot to see if power is making it to sensor.if it is your sensor is not sending power to fan. if no power is making it to sensor, check fuse box on firewall of engine compartment for fen relay some models have 2. Or you can hook the fan up to constant power when car is running via the fuse box under dash, or hook fan up to a toggle switch mounted to your dash, either way you need to run new wires from your fan
Is the fan kicking on? Radiator fan! When engine gets hot, radiator fan should kick on under the hood.
If it does, then there is a blockage in the radiator preventing it from circulating the coolant to dump the heat. Get a Rad flush.
If the fan does not kick on, then check the fan fuse and relays, usually found in an electrical distribution box under the hood. Consult your owners manual for its location and specific fuses / relays.
Possible bad fan too.. but disconnect the fan at the plug in the wiring, and test supply wire for voltage, when engine is above normal temperture.
The fan fuse is #33 in the engine compartment fuse box. See pages 261 and 263 of the owners manual link below. The location of the fuse box in the engine compartment is shown on page 222. Hope this helps.
You can check if the fans are working by turning on you Air conditioning. They should run constantly with the A/C on. Also bear in mind that the fans do not normally come on until the coolant temperature hits around 225-228 degrees.