Question about 2002 Ford F150 Regular Cab

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After replacing the gem module does it has to be programed

Interior lights want come and windows want let down. the fuse for them keeps blowing

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You definitely have a wiring problem. Fuses are blowing because DC (direct current) power is being short circuited by touching a grounded surface area or a negative wire. If its affecting two interior car functions while on the same fuse circuit, then check where the wires from both functions could or would intersect. In your case the windows roll down and the interior lights come on....they could intersect somewhere near the front door jamb or farther forward towards the fuse panel.

Posted on May 11, 2009

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Gem Module, Fuse Box and Window Reseal


This 1997 Ford F150 needs the GEM module changed due to multiple conditions. To see testing that lead to this repair please click here. The GEM module is located t the rear of the interior fuse box.
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The first step is to remove the trim panel that covers the gap between the upper side of the steering column and the dash. It just unsnaps from the dash. It makes it a little easier to remove if you move the shifter all the way down to drive 1.
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With that out of the way the lower dash cover can now be removed. Most of the screws have 7 mm heads but there are two that have 8 mm heads.
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Those two are at the lower edge of the fuse box.
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One wiring harness needs to be disconnected from the panel.
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Now the screws for the fuse box can be removed.
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The wiring harnesses can be removed from the back of the fuse box. Two 10 mm headed bolts at the center of each connector.
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Next remove the tube brace from around the bottom of the steering column. Four fasteners with 13 mm heads.
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Now wiggle, pry and twist the fuse box and GEM module assembly down.
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After the assembly is down far enough unplug the remaining harness connectors from the GEM module.
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Almost there.
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The assembly is now free of the vehicle.
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The GEM module is held to the back of the fuse box by three phillips headed screws.
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Easy to remove Now.
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With the three screws removed the GEM unplugs from the back of the fuse box.
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I put it all back together and checked my repair for power to the driver's power window switch.
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Jan 10, 2012 | 2000 Ford Expedition

1 Answer

Terminal 15 keeps blowing in my 2001 ford f150 supercrew 4x4 lariat i dont know what to do. wont go into gear, lights wont work, windows wont roll down. what should i do???


Central Junction Box / cab fuse panel Fuse 15 ( 5A ) feeds the GEM Module

A leaking windshield ( lower left hand corner ) can cause water to get on the back of the CJB, and corrode the pins to the GEM.

May 30, 2011 | Ford F-150 Cars & Trucks

1 Answer

I have a 200 f 350 super duty. the dome lights and the windshield wipers along with the 4 wheel drive have quit working. All the fuses are good. Someone told body control module. Would that cause these...


Hi,
Did you also check fuses on fuse panel in the engine compartment? GEM/ body module could be the cause. It is mounted on the back of the interior fuse panel. If you have had alot of rain in the past few days, you may have gotten water in the gem module and interior fuse panel. I would remove the 2 large connectors located on the bottom back of the interior fuse panel (they are held in with 2 10mm bolts) and see if there is water present. If there is water then you will need to replace the fuse panel and gem module that is mounted to it. But first fix the water leak which is most likely the windshield or cab visor if you have one installed. If you don't find wet connectors then the gem/ body module is a safe bet since it does control all the things you mentioned.
Hope this helps

Apr 01, 2010 | 2000 Ford F350 Super Duty Super Cab

1 Answer

Abs fuse


Fuses are listed here

* = maxi fuse

1*=50A I/P fuse panel
2*=40A blower motor relay
3*= 50A 4 wheel ABS module
4*=20a Main light switch-Instrument cluster
5*=50A Ignition switch, starter relay

6*=20A Transfer case relay
7*= NOT USED
8*=20A Auto Ride Control Switch/on off switch
9*=40A Auto Ride Control relay
10*=30A PCM power relay

mini fuses
1=10A A/C relay
2=20A Aux power point
3= not used
4=15A Fog lamps-Daytime lamps
5=10A Air Bag diagnostic monitor
6=10A Powertrain Control Module (PCM)
7=30A 4WABS module
8=30A PCM relay
9=20A Fuel Pump2.gif relay and RAP module
10= 15A Horn relay
11=15A Park Lamp relay-Main Light Switch
12=30A Main light switch--Multi Function switch
13=15A Heated O2 sensors, EGR Vacuum Regulator, EVR solenoid,Camshaft position (CMP) Sensor,
Cannister Vent Solenoid, A4LD Auto Transmission
14=30A Generator-Voltage regulator


Interior fuse panel (mini fuses)

1=7.5A Power mirror switch
2=7.5A Blower motor relay,PAD module,Air Bag diagnostic monitor
3=7.5A Trailer tow connector
4=10A Left headlamp
5=10A Data link connector (DLC)
6=7.5A Air bag diagnostic monitor, Blower motor relay, Passive deactivation Module (PAD)
7=7.5A Trailer Tow connector
8=10A Right headlamp, Daytime running lamps (DRL) module, Foglight relay
9=7.5A Stop Lamp switch
10= 7.5A Speed control-amplifier assembly,Brake pressure switch, Generic electronoc Module (GEM)
Shift lock actuator, Blend door actuator, Main light switch, RABS resistor, A/C heater assembly
Flasher
11= 7.5A Instrument cluster, Main light switch, RABS resistor
12= 10A Power window relay, Washer pump relay
13= 20A Stop lamp switch, Brake pressure switch
14= 20A Rear Anti Lock Brake system (RABS) module
**10A 4WABS module**

15=7.5A Instrument cluster
16= 30A Windshield wiper Motor, Wiper Hi-lo relay, wiper run/park relay
17=7.5A Cig lighter
18=15A Drivers unlock relay-All unlock relay
19=25A PCM power diode
20=7.5A RAP module GEM module, Radio
21=15A Flasher (hazard)
22=20A Aux power socket
23=15A Turn signals
24===not used
25= 7.5A GEM module, Instrument cluster
26= 10A Battery saver relay, Electronic Shift relay, Interior lamp relay
Power window relay,Electronic shift control module, transmission control
27=15A Switch,DRL, Backup lamp switch, DTR sensor,Instrument illumination dimming control module
Dome/map lamp, GEM,electronic shift,Interior lights,Glove box lamp and switch
28=7.5A GEM module-Radio
29= 15A Radio
30=15A Park lamps, trailer Tow relay
31===not used
32=10A rear blower
33=15A Headlamps, DRL module, Instrument cluster
34=7.5A Rear integrated control panel, CD
35=10A RABS test connector
36=7.5A CD, rear integrated control panel, memory seat, Message center Attached images fuse%20box001.jpg?imgmax=800 __________________

Oct 29, 2009 | 2003 Ford Explorer

2 Answers

2003 focus interior lights won't come on when you enter or leave car


OMG! My mom had the same problem. Hit the lights for gods sake!

Mar 05, 2009 | 2003 Ford Focus

1 Answer

Fuse or what


Your multifunction switch on the steering column controls your exterior lights. The GEM module controls the interior lights and other stuff. If bad, it would not blow fuses. WHich fuse blows?
Your Ford dealer might be familiar with this issue, so call the service dept and ask them and get a quote. It may be wiring.
reoprt back.

  • The high beams are inoperative
  • Circuitry.
  • Multifunction switch.
  • Go To Pinpoint Test C .


--------------------------------------------------------------
Principles of Operation
Generic Electronic Module (GEM) The generic electronic module (GEM) receives inputs from the following:
  • door ajar switches
  • liftgate ajar switch (wagon)
  • liftgate glass switch (wagon)
  • headlamp switch
  • keyless entry keypad switches
  • the powertrain control module (PCM) (vehicle speed signal)
  • ignition switch
  • remote keyless entry transmitter
The GEM uses these inputs to control the output to the battery saver relay and interior lamp relay. Both relays are integral to the central junction box (CJB) and cannot be accessed directly.
Interior Lighting Systems The GEM grounds the battery saver relay and interior lamp relay coils when any door ajar switch or the headlamp switch is closed. The interior lamp relay then supplies power to the interior lamp circuit. Vehicle speed must be less than 15 kph (9 mph) for the GEM to ground the interior lamp relay. The interior lamps will remain illuminated for a period of up to 25 seconds after all doors are closed or until the ignition is switched from the OFF position, or the GEM receives a vehicle speed signal. Actuating the interior lights from the headlamp switch will operate at any time.
Illuminated Entry Illuminated entry is activated when a keyless entry keypad switch provides ground on the GEM input or when the GEM receives an unlock signal from the remote keyless entry key fob. The GEM then provides ground to the battery saver and interior lamp relay coils. Illuminated entry is deactivated when the GEM receives a lock signal from the remote keyless entry key fob or if the GEM receives ground inputs from the keyless entry keypad switch lock code. Illuminated entry will also be deactivated when the GEM receives input voltage from the ignition switch.
Battery Saver The battery saver is activated when the GEM is not receiving voltage input from the ignition switch (off position). The GEM will then provide ground to the battery saver relay coil for a maximum of 30 minutes depending on the state of the interior lamp switch inputs to the GEM. The energized battery saver relay switches voltage to the demand lamp circuit and the interior lamp relay coil. After time-out, the GEM removes ground to the battery saver relay disabling the demand lamp circuit.
Puddle Lamps The puddle lamp relay operates reverse from the battery saver relay and the interior lamp relay. The puddle lamp relay coil receives voltage when the ignition switch is in the START or RUN position, which disables the circuit to the puddle lamps.
Inspection and Verification
  1. Verify the customer concern by operating the system.
  1. Visually inspect for obvious signs of mechanical and electrical damage.


Visual Inspection Chart Electrical
  • Battery junction box (BJB) fuse 101 (60A)
  • Central junction box (CJB) fuse 226 (10A)
  • Bulb(s)
  • Central junction box (CJB)
  • Generic electronic module (GEM)
  • Connectors
  • Circuitry



Feb 20, 2009 | 2003 Ford Taurus

1 Answer

Interior lights


What they are speaking of is the GEM module however this will not correct the concerns you have.
The GEM controls the following functions:
  • warning chimes and warning lamps
  • one-touch down window
  • windshield washers and wipers
  • battery saver
  • illuminated entry with keyless remote entry
  • interior lighting
Turn signals and hazzard lamps do not go thru the GEM module at all and the reverse lamps all the gem does there is look for reverse so it knows when to activate the auto lock doors when vehicle is in motion.
I suspect you have 2 or more problems here that you may want to get checked by an experienced Ford tech.Also the GEM has to be programed when replaced.It is not plug and play.

Feb 02, 2009 | 2002 Ford Mustang

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