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TPMS light came off on it's own!

Old Jul 13, 2007 | 10:14 PM
  #16  
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Well, if it indeed does go off under 20PSI, then I'm screwed. My tires need to be inflated to at least 50PSI.
 
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Old Aug 26, 2007 | 10:16 PM
  #17  
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i know this is and old post but could you put them in the spare tire under the truck if you are not going going to use it. i have a set 0f 20's w/soon to be 37 rockers and my stock tire wont fit. would that work
 
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Old Aug 27, 2007 | 07:26 AM
  #18  
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Originally Posted by Uncle Bubba
i know this is and old post but could you put them in the spare tire under the truck if you are not going going to use it. i have a set 0f 20's w/soon to be 37 rockers and my stock tire wont fit. would that work
Unfortunately, Ford made these sensors a little smarter than I would have liked. They not only sense the pressures, but movement. They only send out a signal about once an hour when parked to save batteries. It sends out a signal much more frequently when above 20 mph. I built a pressure canister from high pressure PVC 2" well pipe and put the sensors in it. It is pressurized to 32+psi. It works most of the time. However, if I have to drive more than about 20 mins, the light will come on because it has not received a signal. Once I park for a while the light will not come on again for another 20 min drive.
 
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Old Aug 27, 2007 | 08:50 AM
  #19  
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My light actually came back on. I have no Idea how that occured. I'm considering removing the bulb, but I am dreading taking my dash apart!
 
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Old Aug 27, 2007 | 12:54 PM
  #20  
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The TPMS monitors the air pressure of all 4 road tires. The wheel-mounted tire pressure sensors transmit via radio frequency signals, to the vehicle security module (VSM). TPMS functionality is integral to the VSM. These transmissions are sent approximately every 60 seconds when the vehicle speed exceeds 32 km/h (20 mph). The TPMS function compares each tire pressure sensor transmission against a low-pressure limit. If it has been determined that the tire pressure has fallen below this limit, the VSM communicates this on the vehicle communication bus to the instrument cluster. The instrument cluster then illuminates the TPMS indicator and displays the appropriate message(s) in the message center (if equipped).
 
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Old Aug 27, 2007 | 05:56 PM
  #21  
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some one said you can go back to the dealer and get it setup to your new tire psi, but dont quote me on that.
 
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Old Aug 28, 2007 | 11:06 AM
  #22  
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Yup, I tried that, but it will cost $1200, 4 new sensors & about 2 hrs of labor! THEY ARE FREAKING NUTS!
 
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Old Aug 28, 2007 | 11:17 AM
  #23  
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Originally Posted by 5.4 LARIET
Yup, I tried that, but it will cost $1200, 4 new sensors & about 2 hrs of labor! THEY ARE FREAKING NUTS!
Is there a fuse for the TPMS light?
 
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Old Aug 28, 2007 | 11:26 AM
  #24  
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Hey buddy, dude I've tried it all. No fuse. & those are LED lights so the bulb will never burn out. I may just consider taking the dash apart of of these days.
 
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Old Aug 28, 2007 | 11:38 AM
  #25  
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Originally Posted by 5.4 LARIET
Hey buddy, dude I've tried it all. No fuse. & those are LED lights so the bulb will never burn out. I may just consider taking the dash apart of of these days.

Let me know if you need a hand, but there has to be some other way around that light. Im going to see if Manny from TFO knows anything about it.
 
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Old Aug 28, 2007 | 11:43 AM
  #26  
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5.4 Lariet,

Spoke to Manny at TFO and he says that you have to take the stock sensors from the wheels and put them on your new wheels then reset the system with a machine that he has at his shop.

Let me know if you want to call him so maybe he can explain it to you.
 
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Old Aug 28, 2007 | 12:29 PM
  #27  
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Thanks bud! yea i know that was my option. problem is i sold my factory wheels. So I have to purchase new sensors which cost about $200 a pc " As per Ford" That's why I think taking the dash apart would be my best option.
 
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Old Aug 28, 2007 | 12:35 PM
  #28  
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You think that they might have some at a junk yard from a crashed F150? Might be cheaper than buying new.
 
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Old Aug 28, 2007 | 01:39 PM
  #29  
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Originally Posted by Copperhead64
You think that they might have some at a junk yard from a crashed F150? Might be cheaper than buying new.
That would be a tough find as they are only on the 07 up vehicles. And since this is the first year of doing this, I wouldn't be surprised if the way they do are changed in the near future, just for efficiencies sake. The bad part is I was so close with building a little pressure canister. And it cost me less than $40.
 
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