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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

temp indication suddenly stopped

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Old May 20, 2016 | 05:06 PM
  #1  
bart f-350's Avatar
bart f-350
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temp indication suddenly stopped

Hello,

I'm busy to prepare my F-350 '89 7.3L diesel, and I noticed all over sudden my engine temp stopped indicating???
What could be the cause?
Where can I find the sender?
Thanks for the help.
 
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Old May 21, 2016 | 09:52 AM
  #2  
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Briansshop
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From: MD
The gauge was bad in mine. Picked up a cluster from the junkyard and swapped just the temp gauge.
 
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Old May 21, 2016 | 06:14 PM
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88_F0RD
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there are two temperature sending switches

one is on the engine block on the passenger side the other is on top of the intake

at least on a 4.9 I-6.

I replaced both on mine because my temperature switch quit working, the one on the engine block fixed the problem, but you'll have to drain the anti-freeze, it gets everywhere when you remove the temperature sending switch

it also could be the gauge, but the switches are cheap to replace.
 
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Old May 21, 2016 | 10:13 PM
  #4  
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Briansshop
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From: MD
You can check the gauge by pulling the wire off of the sender and grounding it. Gauge should full sweep to cold or hot,can't remember which.
 
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Old May 22, 2016 | 11:44 AM
  #5  
bart f-350's Avatar
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Ok, I'll have a look at that, thanks
 
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