Possible minimum idle airflow off causing a low idle situation. Possible vacuum leak. Check vacuum hoses for splits/disconnection. Check throttle plate for being dirty/gummed up. If dirty clean with carb spray and toothbrush
To find out what is draining the battery do a parasitic draw test . How To Perform Parasitic Draw Test EricTheCarGuy Test to be sure , before replacing GEM module .I would also have the GEM checked for DTC'S - diagnostic trouble codes . I would also check the battery saver relay .
SECTION 417-02: Interior Lighting
2000 Explorer/Mountaineer Workshop Manual
DESCRIPTION AND OPERATION
Procedure revision date: 06/17/1999
Interior Lighting
The interior lighting system consists of the following:
dome/map lamp
rear dome/cargo lamp
overhead console/map lamp
RH/LH vanity mirror
ash receptacle lamp
puddle lamps
interior lamp switches
interior lamp relay
dimmer module
battery saver relay
generic electronic module (GEM)
Generic Electronic Module (GEM)/Central Timer Module (CTM) Controlled Functions
The generic electronic module (GEM) is equipped on four-wheel drive vehicles with power windows. The central timer module (CTM) is equipped only on two-wheel drive vehicles without power windows.
NOTE: GEM/CTM diagnostics are compatible with the scan tool.
The GEM/CTM incorporates the functions of several different modules into one, and offers diagnostics to easily locate and repair concerns affecting the subsystems that it controls.
The GEM/CTM constantly monitors the systems it controls and reports a concern in the form of a diagnostic trouble code (DTC). A DTC can be retrieved with the scan tool through the communication link.
The scan tool is a menu-driven tester that allows the user to run specific tests. The scan tool can isolate faults in the GEM/CTM subsystems through a symptom-driven diagnostic procedure. Connecting the scan tool to the GEM/CTM communication link will not alert the GEM/CTM. If the GEM/CTM is "asleep" when the diagnostic connector is plugged in, the GEM/CTM must be "awakened". If the communication link cannot be established, turn the ignition to RUN.
NOTE: The GEM/CTM has a sleep function to minimize battery consumption. During the sleep mode, the GEM/CTM turns off all outputs and monitors only the following:
door ajar (driver door, passenger door, liftgate, LH rear and RH rear doors).
If a change of status occurs at one of these inputs while the GEM/CTM is "asleep", the GEM/CTM will "wake up." When the GEM/CTM awakens, it carries out an internal self-test, and begins normal operation. At this point, the GEM/CTM will have all of its functions operational.
The GEM/CTM will go into the sleep mode immediately after both of the following conditions have been met:
key in OFF or key not in ignition.
after 45 minutes with no change in any wake-up input.
The GEM/CTM control system has two modes of operation; the normal operating mode and the tester-dependent diagnostics mode.
Normal operation of the GEM/CTM can detect errors. An integral part of normal GEM/CTM operation is continuous diagnostic capability. Continuous diagnostics detects errors and changes the GEM/CTM control strategy. There is no warning lamp for the GEM/CTM; therefore, a DTC concern will direct you to the GEM/CTM. Examples of faults that may be detected during normal operation include:
NOTE: The GEM/CTM can only detect open circuit/short to GRD faults when the GEM/CTM is not energizing a load, and short to battery faults when the GEM/CTM is attempting to energize a load.
Fuel pressure regulator ! An it's location is inside the fuel tank .
The fuel pump (FP) module contains the fuel pump, fuel pressure regulator and the fuel sender assembly. The fuel pressure regulator is attached to the fuel pump in the fuel pump module located in the fuel tank. It regulates fuel pressure supplied to the fuel injectors. The fuel pressure regulator is a diaphragm-operated relief valve. Fuel pressure is established by a spring preload applied to the diaphragm. Excess fuel is bypassed through the regulator and returned to the fuel tank.
How is that possible,they should have a database, such as AllData or Mitchell, etc or they can not work on any product & may aswell close their doors and go out of businessYour owners manual will explain the system asfar as using itAny repair shop, should have 15 years experiencewith an Explorer,there are a million out thereYou need to move on to another shop,don't pay thatone anything
What exactly is not operating? The passenger side fuse panel should have the fuse for the heater motor. The control assembly fuse should be under the hood in the fuse/relay panel. Check owners manual for identification and location
The engine might not be running hot enough, The water pump might not be working properly, The radiator cap might not be sealing properly, The temperature control or climate control are not working properly
Look at the underside of the lid for the fuses and go to your operators manual in the glove box for a list of what each fuse is used for also look at tips for finding fuses
