Where is the cooling fan on a Jeep Cherokee?
Located on driver side of radiator facing engine, the auxiliary electric fan is intended to supplement your clutch fan and provide additional cooling when engine temperature exceeds approximately 215* as well as anytime the air conditioner is on.
Can a bad clutch fan cause a Jeep Cherokee to overheat?
There is also a tiny orange fan diode (below/beside air box) but this rarely gives any problem. Check the clutch fan. It’s easy to overlook but a bad clutch fan will cause overheating in stop & go traffic, while you’re idling or out on the trail at low speeds.
When does the engine cooling fan come on and off?
The fan will then cycle on and off as needed to maintain the proper coolant temperature. So, The fan runs mostly at idle or low speed when the engine is at normal temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees.
What are the symptoms of a bad cooling fan relay?
1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.
How does the cooling fan work on a Jeep Grand Cherokee?
The cooling fan in a Jeep Grand Cherokee keeps engine temperatures at the correct level by kicking on during times when the engine reaches higher-than-average temperatures. Without it, the engine can reach dangerous temperatures and damage engine components.
The fan will then cycle on and off as needed to maintain the proper coolant temperature. So, The fan runs mostly at idle or low speed when the engine is at normal temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees.
Why do Japanese cars have a cooling fan?
Most Japanese cars have a normally closed switch. Those switches open when the set temperature is reached, thus turning the fan (s) on. So, cooling fan motors are an important component to any engine cooling fan assembly. And, play a key role in keeping the car at safe temperatures, during idle and low speeds.
How can I test if my engine cooling fan is working?
That’s why you will need to test it. Unplug the fan connector closest to the fan. Make up some jumper cables. Then connect them directly, from the battery to the fan motor, to see if it spins. Consequently, if it does not spin it is blown.
What causes a Jeep Wrangler to overheat at idle?
When your Jeep overheats only at idle, in most cases it is the Radiator Fan Clutch that has gone bad. Overheating during idle means the fan is not pulling sufficient air through the radiator to maintain the engine operating temperature. Components that can cause your jeep Wrangler to overheat.
Why is the radiator on my Jeep Cherokee overheating?
If someone changed the lower hose and didn’t swap over the spring the hose can actually close shut. The faster the engine runs the harder the hose will clamp shut without this spring as the pump tries harder to pull water from the radiator. Have you tried a simple flush & refill?
How does the cooling fan work on a Jeep Cherokee?
Jeep Cherokee Electric Cooling Fan Diagnosis & Repair. When the air-conditioning is used the engine ECU grounds the A/C relay coil allowing current to flow through it. This activates the A/C relay which then supplies current to the A/C clutch, fan diode assembly and cooling fan relay.
How to check battery voltage in Jeep Cherokee?
Check for battery voltage at terminal 2 of the fan relay connector (Fig. 43). If battery voltage is not present replace the fan diode assembly. With engine running, A/C on, and fan relay removed, check for battery voltage at terminal 2 of fan relay connector (Fig. 43).
What to do if cooling fan does not work?
If fan motor does NOT operate, check continuity between terminal 4 of the relay connector (Fig. 43) and body ground connections on the fender panel back from the relay connector (Fig. 42). If continuity exists replace the fan motor.