2006-08-07 05:13:29 · 6 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Volkswagen
Well as you note, there are two fans. Typically one is controlled by a thermally activated switch and the other is wired to operate when you turn on your air conditioner, as the added thermal load on the engine from running the compressor requires additional cooling.
Now the easiest way to check whether it is the fans that actually do not work, or the ciruits that actuate them that have failed is to hot wire the fans directly to the battery to see if they come on when they are supplied with a direct source of current (bypassing the switches). To do this, you can take an old extension cord and strip the wires on both ends and either attach an alligator clip to the ends you intend to hold on the battery terminals, or just clamp them in place with a clothes pin or the like. Then either on the fan motor housing itself or nearby on the power cables leading to it, you will find a place where you can unplug the fan. After you have done so you can take the bare ends of the extension cable and touch them to the poles on the fan motor and see if the fan runs. If it does not, it is the fan that has failed, and it will have to be replaced.
On the other hand, if the fan does run once you have jumper cabled it to the battery, then you have to look to one of three things as a source of the problem. First, check your fuses. Second, check to see if the cables that lead to the fan are broken, unplugged, or the connections are corroded, giving your poor contact. Third, if the other problems do not exist, you must look to replacing the switches that operate the fans.
2006-08-07 05:30:37 · answer #1 · answered by anonymourati 5 · 0⤊ 0⤋
Do you mean the cooling fan on the front of the car? If so there could be a couple of things easy to check. To check the fan it self first see if the fuse is good. Next put power straight to the fan if it works you must look at other things. The car also has a fan switch that often goes bad thus does not send a signal to the fan to turn it on.
2006-08-07 12:23:33 · answer #2 · answered by uthockey32 6 · 0⤊ 0⤋
It's unlikely that both fans have failed. Your fan relay is the switch which turns the fans on, so there's a good chance that the fan relay is not telling your fans to turn on. The computer in newer cars generally controls the fan relay. A temperature sensor is hooked to your computer so that it will know when to turn the fan relay switch and fans on to cool the engine. A shop technician may be able to use a computer scanner to see if your computer is turning the fan relay on when it should. If not, then he can check the temperature sensor to see if it has failed. But if the computer is trying to switch the fan relay on, he can check to see if the 12 Volt battery voltage is actually reaching the fans or not.
2006-08-07 12:25:57 · answer #3 · answered by bobweb 7 · 0⤊ 0⤋
If you have more than one fan it is probably not them. Check the temperature sending unit (tells the fan when to turn on) or the fan relay (sends power to the fans when the temp. sending unit calls for cooling. First off do you have a blown fuse. Theyre often overlooked as the cause of a problem and are very simple to change.
2006-08-07 12:24:00 · answer #4 · answered by wzzrd 5 · 0⤊ 0⤋
So what should i do about that?????go buy a new one thats all i can say....BY THE WAY IS IT EXACTLY YOUR COOLING FANS OR THE CARS COOLING FANS?????????????? u r talking about.
2006-08-07 12:16:59 · answer #5 · answered by sulaiman s 4 · 0⤊ 0⤋
your relay switch went out just buy pass the switch and wire it strait it will nit hurt it
2006-08-07 12:23:20 · answer #6 · answered by horton_bobby 1 · 0⤊ 0⤋