Where is Fan belt warning light sensor?
07-25-2006, 07:57 AM
#1
Three Wheelin'
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Where is Fan belt warning light sensor?
My fan belt warning light has come on. I checked the engine and it seems both belts are attached to the fan and the fan is turning. Also, a third belt is attached to the a/c compressor (right side of main fan) and it also turns.
Anyone have a picture of the fanbelt sensor? where exactly is it? Can i use the car for a few days otherwise (i goes to the shop next week). The oil temperatures seem to be normal, so the car does not appear to be overheating.
Anyone have a picture of the fanbelt sensor? where exactly is it? Can i use the car for a few days otherwise (i goes to the shop next week). The oil temperatures seem to be normal, so the car does not appear to be overheating.
07-25-2006, 09:00 AM
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I don't have a pic, but the sensor is near the bottom left side of the fan. It is about the size of a matchbox and has a little wheel that presses up against one of the belts. if the belts are not broke, I would assume the sensor is bad or has come loose.
07-25-2006, 12:55 PM
#4
Three Wheelin'
The roller that contacts the belt is attached to a cam which contacts a small metal actuator inside the switch housing. The acutuator trips a microswitch to give you a warning light. You probably have a microswitch that is going bad. You can open up the housing and "adjust" the metal actuator to better trip the microswitch...just be sure it will still trip when you finish.
When my mechanic has to replace one of these sensors (the whole thing with roller & switch), he removes the microswitch from the old one...so he has a drawer full of microswitches. After my microswitch failed, he gave me one from his drawer and all was well
It think the sensor is relatively expensive.. 
When my mechanic has to replace one of these sensors (the whole thing with roller & switch), he removes the microswitch from the old one...so he has a drawer full of microswitches. After my microswitch failed, he gave me one from his drawer and all was well
It think the sensor is relatively expensive..
07-26-2006, 01:09 PM
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The sender is less than $50 from Sunset. I tried to fix mine about 3 times, and finally gave up. My light was coming on intermittently. I cleaned the microswitch, bent the lever that actuates the switch, and even smoothed out a slight groove that had been carved in the plastic curved part that holds the wheel. After some time, the light would eve ntually come back on.
If the light is coming on, the microswitch is most likely the problem, so I would hesitate to replace it with another old one. OTOH, if the replacement switch came from a sender that was replaced due to a squeaky wheel, that's a different story.
If the light is coming on, the microswitch is most likely the problem, so I would hesitate to replace it with another old one. OTOH, if the replacement switch came from a sender that was replaced due to a squeaky wheel, that's a different story.
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07-26-2006, 02:50 PM
#8
Three Wheelin'
Originally Posted by brucec59
The sender is less than $50 from Sunset.
08-16-2006, 02:15 PM
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Originally Posted by brucec59
The sender is less than $50 from Sunset. I tried to fix mine about 3 times, and finally gave up. My light was coming on intermittently. I cleaned the microswitch, bent the lever that actuates the switch, and even smoothed out a slight groove that had been carved in the plastic curved part that holds the wheel. After some time, the light would eve ntually come back on.
If the light is coming on, the microswitch is most likely the problem, so I would hesitate to replace it with another old one. OTOH, if the replacement switch came from a sender that was replaced due to a squeaky wheel, that's a different story.
If the light is coming on, the microswitch is most likely the problem, so I would hesitate to replace it with another old one. OTOH, if the replacement switch came from a sender that was replaced due to a squeaky wheel, that's a different story.
Does anyone have a part number for the sender?
TIA.
08-16-2006, 02:51 PM
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FWIW: I was able to correct an intermittent light coming from my sender by opening it up, cleaning the contacts, and more importantly, rebending the contact arm in teh switch to make a better contact. Like Bruce, I also had that slight groove from where the arm was constantly riding. I'm sure it will fail again soon, but riding fine so far.
05-19-2010, 09:22 PM
#13
I had the fan belt light come on today. I turned off the engine and checked all the belts. They look good, no wear and tear from what I can tell.
Before removing the sensor I decided to put a little contact spray in the sender unit, and also put some silicon spray on the little wheel itself. For the time being the light is off and things seem to work. I'll have to wait and see if and when it turns back on.
Before removing the sensor I decided to put a little contact spray in the sender unit, and also put some silicon spray on the little wheel itself. For the time being the light is off and things seem to work. I'll have to wait and see if and when it turns back on.
