The temperature sending unit can be checked cold, and then hot, for resistance change. The test is performed with an ohm meter.
The EEC TEST connection should be in the engine compartment by the Power Distribution Box in a 1995 Ford Ranger ( EEC - IV , OBD I )
On a 1994 Ford Ranger ( which is OBD I , EEC IV ) should have an EEC TEST connection in the engine compartment ( P.S. I'm not a mechanic / technician )
Run a compression test to verify the condition of the engine.
Swap the relay with another like relay.
Keep alive memory test failed
pounds of compression per cylinder
P0500 is loss of vehicle speed signal. You need to test the speed sensor.
If its just turns on a fan you can put th probe in some boiling water and check the contanuity.
If its just turns on a fan you can put th probe in some boiling water and check the contanuity.
A 1994 Ford Ranger is OBD I / EEC IV and has an EEC TEST connection in the engine compartment by the power distribution box In 1996 , the Ford Ranger changed from OBD I / EEC IV to OBD II / EEC V and has a Data Link Connector in the dash , below the steering wheel , covered by a small removable plastic panel
To test the oil pressure sending unit in a 1989 Ford F250, start by disconnecting the electrical connector from the sending unit. Use a multimeter to check for continuity; a good unit should show continuity when the engine is off and change as the engine runs. Alternatively, you can use an oil pressure gauge by removing the sending unit and installing the gauge in its place to directly measure the oil pressure while the engine is running. If the gauge shows normal pressure but the sending unit does not, the sending unit may be faulty and should be replaced.
Replace with either a manual gauge or just a similar replacement part.