TCCoA Forums banner

Keyless entry and interior lights not working

3K views 4 replies 4 participants last post by  Earl 
#1 ·
As of Thursday night my interior lights-all of them and all keyless entry functions are not functioning. Locks still work from the buttons on the doors, and the aftermarket alarm will lock/unlock. I pulled both the rke module and the anti theft module out of the trunk and I see no visible damage, and there are no blown fuses. Can these modules be repaired? Could the aftermarket alarm cause this? Would the factory alarm be bypassed because of the aftermarket alarm? Reason I ask is because the car has the gold factory alarm module in the trunk yet no anti theft light functioning on the cluster and the factory alarm could not be set off when everything was working both modules where plugged in
 
#2 ·
PRELIMINARY INSPECTION
Verify customer's complaint and operate anti-theft system to duplicate the condition. Check for loose or damaged trunk lock tamper switch and disconnected wiring at trunk lock tamper switch. Trunk lock tamper switch is incorporated into the trunk lock cylinder for the trunk.
If trunk lock tamper switch is not loose, damaged and no disconnected wiring exists, go to next step. If trunk lock tamper switch is loose, damaged or wiring is disconnected, repair as necessary.
Check for defective horn fuse No. 10 (15-amp) in power distribution box. Power distribution box is located at driver's side front corner of engine compartment, near radiator coolant reservoir. Replace fuse if defective. Go to next step.
Check for defective seat/lock fuse No. 10 (20-amp), ACC fuse No. 27 (10-amp) and instrument panel light fuse No. 4 (10-amp) fuse in primary junction block. Primary junction block is located below driver's side of instrument panel, just to the left of the steering column. Replace fuse if defective. Go to next step.
Check for defective park light and anti-theft controller module in-line fuses at anti-theft controller module. Anti-theft controller module is located in the trunk, behind panel cover on driver's side fender. See Fig. 1 . In-line fuses are Black colored and located near front of anti-theft controller module. Fuse for anti-theft controller module is a 20-amp fuse and fuse for park light is a 10-amp fuse. Replace fuse if defective. Go to next step.
Check for any loose or corroded connections at anti-theft controller module and remote keyless entry module. Remote keyless entry module is located near anti-theft controller module. See Fig. 1 . Repair connections if loose or corroded. Proceed to RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM.

RETRIEVING DIAGNOSTIC TROUBLE CODES
Ensure preliminary inspection procedure is performed before proceeding. See PRELIMINARY INSPECTION under SELF-DIAGNOSTIC SYSTEM.
Diagnostic Trouble Code (DTC) may exist if a problem exists in the anti-theft disarm switches on door lock cylinders, trunk lock tamper switch and anti-theft ignition sensor. To retrieve DTCs from anti-theft controller module, turn ignition switch to ON position.
If alarm indicator light does not come on and remain on steady for 10 seconds, go to step 5). If alarm indicator light comes on and remains on steady for 10 seconds, go to next step.
Check anti-theft ignition sensor on ignition switch and Dark Green/White wire between anti-theft ignition sensor and anti-theft controller module. Anti-theft ignition sensor provides ground circuit to anti-theft controller module to indicate ignition switch has been tampered with. Anti-theft ignition sensor is located on side of ignition switch. See Fig. 2 . Anti-theft controller module is located in the trunk, behind panel cover on driver's side fender. See Fig. 1 .
Operate power door unlock button 5 times within 10 seconds to enter output test mode on anti-theft controller module. Count number of times that alarm indicator light on instrument panel flashes. The flashing will repeat every 10 seconds.
If alarm indicator light flashes only one time (DTC No. 1), input signals from anti-theft disarm switches on door lock cylinders and trunk lock tamper switch are operating properly. Proceed to SYMPTOM TESTS for testing by specified symptom.
If alarm indicator light flashes 2 times (DTC No. 2), input signal from anti-theft disarm switch on door lock cylinder to the anti-theft controller module is shorted. Go to next step.
NOTE: Anti-theft disarm switch may also be referred to as door lock cylinder switch.
Check for defective anti-theft disarm switch on each door lock cylinder and for a short circuit on Dark Green/Purple wire between anti-theft disarm switch on each door lock cylinder and anti-theft controller module. Anti-theft disarm switch is located on door lock cylinder. See Fig. 3 . Anti-theft controller module is located in the trunk, behind panel cover on driver's side fender. See Fig. 1 .
If alarm indicator light flashes 3 times (DTC No. 3), input signal from trunk lock tamper switch to anti-theft controller module is shorted. Go to next step.
Check for defective trunk lock tamper switch and for a short circuit on Brown/White wire between trunk lock tamper switch and anti-theft controller module. Trunk lock tamper switch is incorporated into the trunk lock cylinder. Anti-theft controller module is located in the trunk, behind panel cover on driver's side fender. See Fig. 1 .
If alarm indicator light flashes 4 times (DTC No. 4), input signals from anti-theft disarm switch on door lock cylinder and trunk lock tamper switch to anti-theft controller module are shorted. Go to next step.
Check for defective anti-theft disarm switch on each door lock cylinder and for a short circuit on Dark Green/Purple wire between anti-theft disarm switch on each door lock cylinder and anti-theft controller module. Check for defective trunk lock tamper switch and for a short circuit on Brown/White wire between trunk lock tamper switch and anti-theft controller module. Anti-theft disarm switch is located on door lock cylinder. See Fig. 3 . Trunk lock tamper switch is incorporated into the trunk lock cylinder. Anti-theft controller module is located in the trunk, behind panel cover on driver's side fender. See Fig. 1 .

TEST A: ALARM SYSTEM DOES NOT ARM OR DISARM PROPERLY
Start engine. Turn ignition off. Disconnect connectors at anti-theft controller module. Anti-theft controller module is located in the trunk, behind panel cover on driver's side fender. See Fig. 1 . Ensure all doors and trunk are closed.
Using ohmmeter, check resistance between connector C408 terminal No. 3 (Orange/White wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If resistance is less than 100 ohms, go to next step. If resistance is 100 ohms or more, go to step 5).
Disconnect wiring harness for door ajar warning light switch on driver's and passenger's doors latch assemblies. Using ohmmeter, check resistance between connector C408 terminal No. 3 (Orange/White wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 .
If resistance is less than 100 ohms, repair short to ground on Orange/White. Retest system operation. If resistance is 100 ohms or more, replace door ajar warning light switch as necessary. Retest system operation.
Using ohmmeter, check resistance between connector C408 terminal No. 6 (Dark Green/Purple wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If resistance is less than 100 ohms, go to next step. If resistance is 100 ohms or more, go to step 9).
Disconnect wiring harness for anti-theft disarm switches on driver's and passenger's doors. Anti-theft disarm switch is located on door lock cylinder. See Fig. 3 . Using ohmmeter, check resistance between connector C408 terminal No. 6 (Dark Green/Purple wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 .
If resistance is less than 100 ohms, repair short to ground on Dark Green/Purple wire between anti-theft disarm switches and anti-theft controller module. Retest system operation. If resistance is 100 ohms or more, go to next step.
Using ohmmeter, check resistance between electrical terminals on anti-theft disarm switch on driver's and passenger's doors. If resistance is less than 100 ohms, replace anti-theft disarm switch. Retest system operation. If resistance is 100 ohms or more, go to next step.
NOTE: Remote keyless entry module may also be referred to as electronic door lock control processor.
Ensure ignition is off. Disconnect connectors from remote keyless entry module. Remote keyless entry module is located in the trunk, behind panel cover on driver's side fender. See Fig. 1 .
Using voltmeter, check voltage between connector C409 terminal No. 8 (Red/Orange wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If voltage is less than 2 volts, go to next step. If voltage is 2 volts or more, repair short to battery voltage on Red/Orange wire. Retest system operation.
Using voltmeter, check voltage between connector C408 terminal No. 7 (Pink/Orange wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If voltage is less than 2 volts, go to next step. If voltage is 2 volts or more, repair short to battery voltage on Pink/Orange wire. Retest system operation.
Using voltmeter, check voltage between connector C409 terminal No. 9 (Pink/Black wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If voltage is less than 2 volts, go to next step. If voltage is 2 volts or more, repair short to battery voltage on Pink/Black wire. Retest system operation.
Using voltmeter, check voltage between connector C408 terminal No. 4 (White/Purple wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If voltage is less than 2 volts, go to next step. If voltage is 2 volts or more, repair short to battery voltage on White/Purple wire. Retest system operation.
Ensure ignition is off and connectors are disconnected from anti-theft controller module and remote keyless entry module. Locate the Gray colored connector C455 for remote keyless entry module.
Install jumper wires between ground and terminals No. 3 (Red/Orange wire), No. 6 (Pink/Orange wire) and No. 16 (Pink/Black wire) on connector C455 for remote keyless entry module. See Fig. 5 .
Using ohmmeter, check resistance between connector C409 terminal No. 9 (Pink/Black wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If resistance is 100 ohms or more, repair open circuit on Pink/Black wire. Retest system operation. If resistance is less than 100 ohms, go to next step.
Using ohmmeter, check resistance between connector C408 terminal No. 7 (Pink/Orange wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If resistance is 100 ohms or more, repair open circuit on Pink/Orange wire. Retest system operation. If resistance is less than 100 ohms, go to next step.
Using ohmmeter, check resistance between connector C409 terminal No. 8 (Red/Orange wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If resistance is 100 ohms or more, repair open circuit on Red/Orange wire. Retest system operation. If resistance is less than 100 ohms, go to next step.
Remove jumper wires between ground and terminals No. 3, 6 and 16 on connector C455 for remote keyless entry module. Using ohmmeter, check resistance between connector C408 terminal No. 7 (Pink/Orange wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If resistance is less than 100 ohms, repair short to ground on Pink/Orange wire. Retest system operation. If resistance is 100 ohms or more, go to next step.
Using ohmmeter, check resistance between connector C409 terminal No. 8 (Red/Orange wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If resistance is less than 100 ohms, repair short to ground on Red/Orange wire. Retest system operation. If resistance is 100 ohms or more, go to next step.
Using ohmmeter, check resistance between connector C409 terminal No. 9 (Pink/Black wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If resistance is less than 100 ohms, repair short to ground on Pink/Black wire. Retest system operation. If resistance is 100 ohms or more, go to next step.
Using voltmeter, check voltage between connector C408 terminal No. 1 (Tan/Light Green wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . If voltage is more than 9 volts, go to next step. If voltage is less than 9 volts, repair open circuit on Tan/Light Green wire between anti-theft controller module and seat/lock fuse No. 10 (20-amp) in primary junction block. Retest system operation. Primary junction block is located below driver's side of instrument panel, just to the left of the steering column.
Ensure ignition is off. Reinstall connectors on anti-theft controller module and remote keyless entry module.
Using voltmeter, check voltage at connector C408 terminal No. 7 (Pink/Orange wire) and connector C409 terminal No. 9 (Pink/Black wire) for anti-theft controller module when doors are locked by depressing LOCK button on remote keyless entry transmitter. See Fig. 4 .
Voltage at connector C408 terminal No. 7 (Pink/Orange wire) should be less than 2 volts and battery voltage should momentarily exist at connector C409 terminal No. 9 (Pink/Black wire) when doors are locked by depressing LOCK button on remote keyless entry transmitter. If voltages are within specification, replace anti-theft controller module. Retest system operation. If voltages are not within specification, a problem exists in the remote keyless entry system. See KEYLESS ENTRY SYSTEM - REMOTE article.
Fig. 4: Identifying Anti-Theft Controller Module Connectors & Terminals
Courtesy of FORD MOTOR CO.

Fig. 5: Identifying Remote Keyless Entry Module Connectors & Terminals
Courtesy of FORD MOTOR CO.

TEST B: ALARM SYSTEM DOES NOT ACTIVATE PROPERLY
Start engine. Turn ignition off. Note location of anti-theft controller module located in the trunk, behind panel cover on driver's side fender. See Fig. 1 .
Ensure all doors closed. Open only the driver's door. Connect voltmeter between connector C408 terminal No. 3 (Orange/White wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . Note voltage reading.
Close driver's door and open passenger's door several times while noting the voltage reading. If voltage is less than 2 volts when driver's door is closed and passenger's door is opened, go to step 7). If voltage is 2 volts or more when driver's door is closed and passenger's door is opened, go to next step.
Disconnect wiring harness for door ajar warning light switch on driver's and passenger's doors latch assemblies. Using jumper wire, connect the 2 circuits together on wiring harness for each door ajar warning light switch.
Using ohmmeter, check resistance between connector C408 terminal No. 3 (Orange/White wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 .
If resistance is less than 100 ohms, replace door ajar warning light switch as necessary, as an open circuit exists in the switch. If resistance is 100 ohms or more, repair open circuit on Orange/White wire between door ajar warning light switches and anti-theft controller module. Retest system operation.
NOTE: The Orange/White wire joins into a connector where it changes into a Red wire for the passenger's door and a Dark Blue wire for the driver's door.
Arm anti-theft system with the windows open. See ARMING & DISARMING OF ANTI-THEFT SYSTEM under OPERATION. Open one door by using the inside door handle and note operation of the horn.
If the alarm operates and the horn sounds, anti-theft system is operating properly at this time. Check for any other symptoms that may exist. See SYMPTOM TEST DIRECTORY TABLE under SYMPTOM TESTS . If the alarm fails to operate and the horn does not sound, replace anti-theft controller module. Retest system operation.

TEST F: ALARM INDICATOR LIGHT DOES NOT OPERATE TO INDICATE ARMING
Start engine. Turn ignition off. Disconnect connectors from anti-theft controller module. Anti-theft controller module is located in the trunk, behind panel cover on driver's side fender. See Fig. 1 .
Connect jumper wire between connector C408 terminal No. 15 (Dark Blue/Light Green wire) and connector C409 terminal No. 26 (Black/Yellow wire) for anti-theft controller module. See Fig. 4 . Note operation of alarm indicator light.
If alarm indicator light does not come on with jumper wire installed, go to next step. If alarm indicator light comes on with jumper wire installed, replace anti-theft controller module. Retest system operation.
Remove jumper wire. Remove bulb for alarm indicator light from instrument cluster. See ALARM INDICATOR LIGHT BULB under REMOVAL & INSTALLATION. Remove instrument panel light fuse No. 4 (10-amp) fuse from primary junction block. Primary junction block is located below driver's side of instrument panel, just to the left of the steering column.
Using ohmmeter, measure resistance on instrument panel light fuse No. 4 and bulb for alarm indicator light. If resistance on fuse and bulb is less than 100 ohms, go to next step. If resistance on fuse or bulb is 100 ohms or more, replace fuse or bulb as necessary. Retest system operation.
Repair open circuit on Light Green/Yellow wire between instrument panel light fuse No. 4 in primary junction block and alarm indicator light, or open circuit on Dark Blue/Light Green wire between alarm indicator light and anti-theft controller module. Retest system operation.


Fig. 4:


Fig. 5:



Sorry about the huge post, but I wanted to get all of that into one rather than multi post.
 
#3 ·
Under the carpet on the drivers side there is a giant thing of wires, mine had one that was burnt out and caused the same issues you have. I just replaced the section of wires that was burnt and it came back. Alas I have the same issue again and I can't find the wire this time.
 
#5 ·
Thanks for all the help, I really appreciate it...I ended up pulling the trunk carpet up, and found the two inline fuse holders. The fuse holder going to the alarm module has nothing in it, which explains why the factory anti theft does not work

Anyway, I pulled the keless inline fuse, and it was good, so I re-installed, and plugged all the keless/alarm boxes back in, and all works as it should now...hope it keeps working correctly.

QUESTION - I have an aftermarket alarm, which is probably why the factory alarm fuse was pulled. If I re-install the fuse for the facory alarm, would the factory and aftermarket alarms conflict with one another?

I would really like to remove the aftermarket alarm and just go back to stock on all of this...
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top