Quote:
Originally Posted by Arthur Dalton
If you have high fan when you unplug the blu sensor, but it does not come on when the coolant temp gets to 105/107, then the sensors values are off spec. A new sensor will work..
There is also a modification we do by putting a resistor across the sensor that allows the cut-in spec of the sensor to drop to around 100C..you may want to do that.
Search Archives.
There should be a distinct difference from low/high speeds, so if you do not see that, then the fan motor is suspect, along with the other bad one.
Another trick is to put a cabin on/off toggle switch across the wires I had you jumper to test for low fan..that allows you manual control of the fans from the cabin..cheap mod and comes in handy when you run into overheat condition like you did the last time.
Both fans must run, so start there.........sometimes the brushes get crap in them and a sharp blow at the blade fron hub w/rubber hammer will get one going again
|
I am actually the OP and just wanted to thank those guys. I couldn't at the time due to some IT issues.
The fans and sensor did get sorted because of them. (The low speed of the fans decreased when both were working...).
Also by putting a 1.1K resistor across the blue sensor, the emergency cut in temperature is much lower - less than 100C. Loved the price of those resistors - 45c for a pack of 8.
Cheers
Stu
1992 300TE