That was about a year ago and I've just put up with it since then. Really starting to annoy me now. Cheers, Andy I have some of the similar problems with my '99 1. Read here: Can anyone offer how to test the module to see if it is bad? This is a 2003 Jetta with 195K. I disconnected the fan for now. I only saw the fans spin at 1st and secondary speeds. Yesterday it over heated, temp at 130; max.
New here, wondering if I can get some help. Theres 4 wires going to the fans, Thick brown Neg 12 volts wire, thin positive red white 12 volts and two thicker ones. The good news is the temp gauge definitely works because if shoots up if the car is not moving at a good clip! Can anyone offer how to test the module to see if it is bad? The fans spin at highest speed. Kicks in at 70 deg water temp. Troubleshooting the cause: At first I thought it might be Thermostat which I changed 2 years ago as the car overheated and that solved the problem then. A duty cycle above 90 percent or below 20 percent will command the compressor off.
I thought well maybe the thermostat is Opening but not enough like the last one and not allowing enough cold water from the radiator to flow thus causing the car to over heat. I also searched high and low attempting to source a replacement. So I eliminated the fans as the faulty part. Fan control module im thinking? Cannot afford to let it run hot. I then disconnected the fans and started the car till it reached about 100 deg.
Be carefull not to let the fan spin for too long since your connection to the fan is not protected by a fuse The 'short' i was refering to earlier in this post is in fact the coil impedance of the fan motor. Now occasionally the fans will pulse for 30 seconds or so on first start of the day i say occasionalyy and not always they then stop, during this 30 seconds the air con pump wont engage at all! I'm no mechanic and it was a relatively easy and painless job. If the few beats did the trick, or because the temperature under the hood dropped remains to be seen. I went below the car had the car up on ramps to access this as well as from standing over it. In the meantime, perhaps the below links will also be of help to someone. Its seems like the fan is creating a short. There is no way to test it other than to verify every input and every power and ground.
The control module part of the fan itself was intermittent which was causing the engine to overtemp. As soon as the water temp drops to 100, the medium speed kicks in and it goes back to 90. I've got a similar problem. These seem to be a weak point for the vehicles. Now with the same wire bridge the 1st and 3rd pins in the radiator unit plug and the fans should spin at the fast speed. Another thing talking about the vr6, in the thermostrat housing are three sensor one of them also makes the fans to kick in and another works with the cluster gage to read the temparature but like i said im not familiar with the 1.
Buyer agrees to all terms stated here. I hope those sensors work the same way. Are these all the same or do I need that specific one? Now sometimes the aircon pump wont engage even when the fans are not pulsing, but this is rare. Back the the original problem. You may have to before you can post: click the register link above to proceed. The fan that keeps running is either the control module under the battery or the low speed relay on the fuse box.
Perhaps ot has chafed through somewhere or was caught somewhere with the engine change. . Note: A loss of throttle basic settings will keep the compressor from activating. I am currently in Vancouver and the 1h+ stop and go traffic did make the fans come on for the first time - they are quiet! I asked my bro to clean it and he dipped it in Salt and Vinegar i think. I disconnected the fan plug and checked for voltage and got nothing and checked voltage at the compressor and it showed 1.
In the 3rd picture you've posted up there is a black plastic cover in the bottom left hand corner. I found this link on testing the fan control module. Reconnect the T14 connector and restart the vehicle. Cheers, Andy Nope they dont go off when i turn the ignition off atall, always run on for about 5mins. I've had my 2000 2. Low fan speed should then kick in.