Have a 95 ford ranger 4 cyl need to know where coolant temp switch is located my gauge is inop i found coolant temp sensor for computor need one for the gauge

Temp switch - Under hood, center, upper engine area, front of intake manifold, driver side of distributor, mounted in engine block,
Coolant temp sensor - Under hood, center, front engine area, passenger side of distributor, mounted in intake manifold,
There is no water sensor

it is located at top of engine at the front hopefully this pic helps

the coolant temp sensor lets the cpu know when to turn on the fans when the coolant temp is high. It also shows the temp on the gauge in the car. I also have seen where if they go bad they will make the car run funny. It is located on the drive side in the cyl head on neons

The larger of the two is the coolant temperature sensor. The other is the actual gauge temperature sensor. The coolant temp. sensor gives information to the cars computor & when the car reaches a predetermined temperature, the computor changes the ignition timing allowing the car to run at normal operation temperature settings. The temperature sensor gives info to the dash board gauge &/or temp. warning light. The reason you can't start on cold days is that your coolant temp. sensor is stuck in advanced mode & the timing is to far advanced . To remedy this problem change the coolant sensor. Good luck!

The single wire sensor for the gauge is located in the engine block directly below the #4 exhaust port.

your thermostatic fan relays aren`t funtioning properly

4.0 sometimes has one on left rear of cyl head Usually the front one does both ...goes to computer, then to fan relay then fan.

The wiper switch is most likely bad. Check the coolant level for the temp. issue. Low coolant will cause a gauge to shoot up suddenly

Switch ig. on, ground the sender unit wire for about 3 seconds see if the temp. gauge moves, if so change sender unit, if not then it is a faulty gauge reader.