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I have a 2002 Ford Explorer. I replaced the battery and now the battery charging light on the instrument panel is on (red) and the gage shows a very low charge. I took my truck back to AutoZone, they checked the new battery, they told me the battery was charging properly and that I need to check my relays and fuses. The alternator is also working properly. Also, my radio will not work now as well as the clock. The A/C works but will not blow on high anymore. Any ideas as to what relay or fuse it might be?
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It's called a GEM - generic electronic module .It is located behind center of the instrument panel .
SECTION 419-10: Multifunction Electronic Modules
2000 Explorer/Mountaineer Workshop Manual
REMOVAL AND INSTALLATION
Procedure revision date: 10/07/2004
Module - Generic Electronic (GEM)/Central Timer (CTM)
Removal
CAUTION: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result. Depower the supplemental restraint system (SRS). For additional information, refer to Section 501-20B .
Remove the audio unit. For additional information, refer to Section 415-01 .
The charging system on your vehicle is computer controlled . Is the battery symbol light lit on the instrument cluster ? Check engine light lit . Do you know how to do automotive electrical testing ? Test the havier gage wire on the back for B+ voltage also the red wire in the connector . Who replaced the Alternator ? Ford replacement or aftermarket ? Ford PCM controlled alternator testing Watch this video ,
Your temp.gauge is probably bad ! Check for voltage at the coolant temp. sender ! You have to check it with the engine running . The red with white stripe should have a voltage the other wire ,yellow with red stripe is ground side ! Instrument panel fuse box fuse # 15 a 10amp fuse powers the gauges ,if your gas gauge works it's not the fuse . The dome lights get there power from an other fuse an circuit ! Did you check the bulb ? Check fuse # 8 IP fuse box , also a 10amp . Check for voltage at the dome light ,switch on !
It depends on which system you have. In both cases, there is a black and yellow wire that goes to the fuse box and a 15 amp fuse. This wire provides stator current to run the alternator. There is also a yellow and white wire that goes to the fuse box that provides the charge current to the battery. Now depending on the system, there may be only one additional wire (light green/red) to the instrument panel battery light or there are 2 wires (brown/white and grey/orange) that go to the PCM. In the latter case, the PCM monitors the charge current and then turns on the instrument panel light when the charge current is insufficient. In the former case, the alternator has circuitry to determine when the batter light should turn on. OK? Is there a problem we can help you with?
YOU NEED TO CHECK OR CALL THE FORD DEALERSHIP.TELL THEM YOUR ENGINE SIZE AND YEAR OF VECHICLE.THEY WILL TELL YOU WHAT AMP ALTERNATOR TO USE.IF YOU HAVING IDLING PROBLEMS.WHEN YOU DISCONNECT BATTERY.TO REPLACE ALTERNATOR.THE COMPUTER LOST MEMORY.WHICH WILL CAUSE YOU TO LOSE IDLE CAUSING VECHICLE TO STALL OUT AT STOP SIGNS OR LIGHTS.THE COMPUTER WILL RELEARN ITS SELF BUT ITS BEST TO TAKE TO DEALERSHIP TO RESET YOUR IDLE SO YOUR VECHICLE WILL STOP STALLING OUT ON YOU.
A "check gage light" typically indicates a faulty reading on one of the gages located on your instrument cluster. After starting your vehicle, observe your instrument cluster if one of the indicator needles on the instrument cluster remains all the way to the left or "pegs" out all the way to the right, it may be the cause of your fault. The exception is the coolant temperature gage it will take 10 to 15 minutes after which the needle should rise to a normal position. Correcting the "faulty gage light" will depend on which gage is malfunctioning. Once you have figured out which gage is causing the check gage light to illuminate, then we can proceed to correcting the problem causing it.
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