Could be the gauge also , which means the instrument cluster would have to be repaced . Rather then playing around with the coolant temp sensor an wiring diagrams , have it checked for code's . Your vehicle has a cylinder head temp sensor .(CHT)
Principles of Operation
The Expedition and Navigator instrument clusters are configurable, hybrid electronic clusters (HEC) that contain a microprocessor, gauges, indicator lamps, and internal circuitry. The instrument cluster is non-repairable at the dealership level with the exception of the warning indicator bulbs on the Expedition only and the instrument cluster lens on both the Expedition and Navigator clusters. The instrument cluster utilizes hardwired circuitry, the standard corporate protocol (SCP), and universal asynchronous receiver-transmitter (UART)-based protocol (UBP) communication networks. Communication using the SCP network transmits and receives data between the instrument cluster, the powertrain control module (PCM), and the anti-lock brake system/traction control/integrated vehicle dynamics (ABS/TC/IVD) module. Communication using the UBP network utilizes data transmitted and received by the instrument cluster and the four-wheel drive control module, power liftgate module (Navigator only), parking aid module, air suspension module, vehicle security module, driver seat module and the electronic air temperature control (EATC). For additional information regarding the SCP and UBP communication networks, refer to Section 418-00 .
It is very important to understand:
The PCM receives the engine coolant temperature status through hardwired circuitry to the engine coolant temperature (ECT) sensor. The instrument cluster receives the engine coolant temperature data from the PCM through the SCP communication network. The instrument cluster microprocessor monitors the engine coolant temperature data received from the PCM and commands the temperature gauge indication with a corresponding movement of the pointer.
Your best bet , take it to a qualified repair shop . You have no idea of the electronic's involved here .
PINPOINT TEST E: INCORRECT TEMPERATURE GAUGE INDICATION
Test Step
Result / Action to Take
E1 RETRIEVE THE RECORDED DTCS FROM BOTH CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER SELF-TESTS
Yes
If instrument cluster DTC U1073 is retrieved, REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual to continue diagnosis.
For all other instrument cluster DTCs REFER to the Instrument Cluster Diagnostic Trouble Code (DTC) Index.
No
GO to E2 .
E2 CARRY OUT THE COOLANT TEMPERATURE GAUGE ACTIVE COMMAND USING THE DIAGNOSTIC TOOL
Yes
REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual to continue diagnosis.
No
GO to E3 .
E3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Yes
INSTALL a new instrument cluster. REFER to Instrument Cluster in this section. TEST the system for normal operation.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
SOURCE: temperature gage in truck doesn't work neither does gas gage
did you check all the ground wires to make sue you have a good ground
SOURCE: ford ranger truck overheating
I have had this happen with my ranger. Changed everything I could to try to fix the over heating. It turned out that I had a small leak in my head gasket and it was allowing exsaust gas to go into the cooling system witch was over pressurizing it. Also the air from the exsaust will heat up much faster than liquid making your thermostat to read hot and will not be able to blow hot air in the cab because there is no liquid going to the heater core. This happened to me when my blet came off and I tryed to make it home. If you had it over heat for a long peirod of time it may have ripped the head gasket.
SOURCE: Engine Coolant Temperature Gage
I have a 2006 and had the same problem. The car was still under warranty, so I took it in for repair. Several times. They finally replaced the thermostat and that solved the issue. Try that.
Good luck and please let me know how it works out for you.
SOURCE: Jeep Grand Cherokee straight 6 1997. My
You'll have to look around on some of the jeep forums for exact details on how to remove the VIC, but the problem is the #8 wire in a ribbon connector that holds the two VIC circuit boards together. One is the "brain", and the other is the display, and interface.They go together in the VIC "box" like a sandwhich, with the ribbon cable in between.
The factory that made the VICs use a wave soldering method, and the #8 pin (which is the coolant sensor ground pin- IIRC it's pink- will have a cold solder joint.
It takes about 15 minutes to get the VIC out of the car, and if you can solder, another 5 to fix the problem. I'd advise re-soldering all the connections, while you're in there.
OR, buy a used VIC off of someone on E-Bay. The problem with that is they might have the same affliction.
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I got a new radiator new thermostat a new resevoir tank and a new upper radiator hose.. The truck is not overheating but in the gage it said i am... Gage only goes up when i accelerate, when idle temp goes down... So any ideas
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