Temp gauge not workign properly
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Senior User
Joined: Feb 2004
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From: new braunfels ,tx
Temp gauge not workign properly
92 ranger 2.3 liter temp gauge is not working. THis morning it was 40 degrees and turned the heater on and after a few mins it was blowing hot so i know the engine is warming up. Even in the summer time it never really was in the middle of Normal.
Where should I start?
Where should I start?
Fleet Mechanic
Joined: Feb 2007
Posts: 1,716
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From: Boston, MA
Coolant Temp Sensor. on your truck I think it is on top of the engine near the t-stat. you probably have a similar one for the pcm around somewhere also. on my 99 they are both in the t-stat outlet housing. Make sure your system is completely full with no air in it......... does the gauge fluctuate when you rev the engine?
Thread Starter
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Senior User
Joined: Feb 2004
Posts: 387
Likes: 0
From: new braunfels ,tx
Coolant Temp Sensor. on your truck I think it is on top of the engine near the t-stat. you probably have a similar one for the pcm around somewhere also. on my 99 they are both in the t-stat outlet housing. Make sure your system is completely full with no air in it......... does the gauge fluctuate when you rev the engine?
I replaced some temp sensor on the passenger side of the engine when i first bought the truck but maybe it was faulty. Thats all i did besides changing thermostat and then kind of gave up on it. But now im interested in getting the temp gauge working again.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,716
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From: Boston, MA
The sensor you changed might have been the water coolant sensor for the pcm I think it is a 2 wire the temp gauge sensor I think is 1 wire but the other post was a good point if you don't have the factory recomended tstat the gauge could be off
Postmaster
Joined: Oct 2003
Posts: 4,516
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From: SoCal
On most Fords the wire for the temp gauge sending unit is red with a white stripe.
Try this very simple little test.
Pull the rubber boot off of the sender & shove a nail in it. Turn the key on & touch the nail to the engine beside the sender.
If the gauge reads full hot the gauge is fine & you probably just need a new sender since you allready replaced the T-stat.
On Fords with an idiot light the sender is a simple on/off switch. With a gauge the sender is a variable resistor.
You want the sender for a gauge.
Should have mentioned that if the gauge does'nt move you are looking at the wrong sender.
Try this very simple little test.
Pull the rubber boot off of the sender & shove a nail in it. Turn the key on & touch the nail to the engine beside the sender.
If the gauge reads full hot the gauge is fine & you probably just need a new sender since you allready replaced the T-stat.
On Fords with an idiot light the sender is a simple on/off switch. With a gauge the sender is a variable resistor.
You want the sender for a gauge.
Should have mentioned that if the gauge does'nt move you are looking at the wrong sender.
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