schematics and diagrams: cooling fans

Showing posts with label cooling fans. Show all posts

Thursday, November 29, 2012

Jeep:Radiator fan won't turn off

Engine Cooling Fan will run Non-stop forever

Even with ignition off the fan runs non-stop.

These drains the battery in few hours.

Problem noticed in 1998 Jeep Cherokee

If the fan is running,these clears that fuse is OK.Because if fuse is blown,the fan will not turn ON.

The doubt goes on cooling fan relay.The relay is got bypassed.

The fan relay is likely shorted and keeping the fan motor energize
To check this you can remove the relays from the fuse panel
Remove the cooling fan rely from the underhood fuse box

See below Power distribution center fuse box diagram shown below:----

1998 Jeep Cherokee Fuse box

You have to see the section marked "C" which is the Cooling Fan Relay

the relay is a square black plastic box, the relay/fuse box is next to the battery. It is a long (10" x 5") black box with a plastic cover that swings up from one of the long ends.
Pull the relay out and see if Fan stops running or not.

Beside radiator cooling fan relay there are many other relays too,insert that relays in place of cooling fan relay and see if fan functions right or not.

But if you swap the relay and same issue with new relay or another relay too,then another possibility is faulty ignition switch.These is because when you turn on the ignition the fan relay and other relay gets power,if the ignition switch is off then another relay should not get power.Test voltage at ignition switch with ignition off,no volt should be there.If yes then ignition switch is faulty causing the problem.

These details will help.
Thanks.

Users Who Viewed This Problem Also Viewed:

Cooling Fan Stays ON with Ignition Off?

http://whatisbyme.blogspot.in/2012/07/cooling-fan-stays-on-with-ignition-off.html

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Cooling fan relays location ?

http://technoanswers.blogspot.in/2012/02/cooling-fan-relays-location-on-1998.html

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DIC says "COOLING FAN FAULT"?

http://schematicsdiagram.blogspot.com/2011/12/dic-says-cooling-fan-fault.html

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Heater fan and headlights will not turn off with ignition off?

http://technoanswers.blogspot.com/2012/01/heater-fan-and-headlights-will-not-turn.html

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Fuel pump relay and cooling fan relay troubleshooting ?

http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html

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Where Is Radiator Fan relay and Fuse Located?

http://schematicsdiagram.blogspot.com/2011/12/where-is-radiator-fan-relay-and-fuse.html

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Sunday, June 3, 2012

1995Dodge Caravan: Procedure to Replace A/C Condenser Fan?

Replacing details and procedure for Air-conditioner Condenser Fan Assembly.

If you only need to replace fan then its very simple.
you have to pull it up some, tilt it downward, lift up, tilt down, lift up and out.

But for replacing condenser Assembly.

There are 2 ways. Either unbolt and remove the radiator, or remove the front grill and bumper cover. The Removing radiator is easier of the 2 methods to replace condenser.

you can remove the fan, unbolt the radiator, remove transmission lines and hoses from it and lift up enough to come off mountings at bottom and lean against engine and squeeze the condensor out.

you are not going to get it out without at least doing that much. if you elect not to do that, you will be spending a few hours fighting to get it out without success.

Labor time to replace is 2.1 hours, so it isnt a simple unbolt the condensor lines and pull out.

This details will help.
Thanks.

Users Who Viewed This Problem Also Viewed:

For All types of Car models and brands help
Go to Newly Launched

FREE Car repair guide?
http://technoanswers.blogspot.in/2012/03/car-repair-guide.html

&
Complete Car repair Help FREE?

http://repairhelpcenter.blogspot.in/2012/03/complete-car-repair-help.html

Sunday, November 6, 2011

Car overheating?

This problem is faced my many car users.Very difficult to troubleshoot and takes long hours to get problem confirmed.Not always,but in most of cases.
It could be the thermostat, the water pump, or engine damage from prior overheating.

The first thing that you want to do is check the cooling system for any exhaust gases. There is a tester for that, that you can get from Autozone for about $20. It comes with instructions, but there is a blue fluid that is used in it, if the fluid turns yellow, that is exhaust gases.

If there are any exhaust gases in the cooling system, that will cause more pressure than desired and will allow the engine to burn coolant and/or heat the coolant up too high. Most times not filling the crankcase with coolant either.
If there are, then there would be an internal engine problem, like a head gasket or head.
Of course, you will want to make sure that the system is full, the coolant is circulating, and the cooling fan(s) are working as well as the pressure cap holding pressure.

Getting this details checked will help you to confirm the problem.

Thanks.

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