Question about 1991 Ford Bronco

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Door actuator 1991 bronco( passenger side)

Hello, I have power door locks on my 1991 bronco. The passenger side door lock will not work electronically or with the key, the drivers side works fine. I have bought a new actuator, but how to you get the old one out?

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You need to  take off the inside panel. if i remember correctly its just a couple screws and it should pop off.

Posted on Jan 12, 2009

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Posted on Jan 02, 2017

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1 Answer

Passanger side doors wont lock


From where , any switch ? driver door switch or either passenger door switch . This is a very complex system controlled by modules (microprocessors)
?€¢
The driver door switch assembly (DDSA)


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The driver door module (DDM)


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The passenger door module (PDM)


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The rear door module (RDM)


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The LH front power door lock switch


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The RH front power door lock switch


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The LH front door lock actuator


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The RH front door lock actuator


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The LH rear door lock actuator


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The RH rear door lock actuator


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The remote control door lock receiver (RCDLR)


?€¢
The power door serial data circuit


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The class 2 serial data circuit


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The DRVMDL Fuse - 10 amp


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The PDM Fuse - 10 amp


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The RRINMDL Fuse - 10 a
Class 2 and Power Door Serial Data Links
The class 2 and power door data circuits are both serial data links. The serial data circuits replace cables in the vehicle by multiplexing (time-sharing) data to and from each device over a single wire referenced to ground. If the power door serial data is lost, both the rear door module (RDM) and the passenger door module (PDM) enters the sleep mode. With the RDM and the PDM in sleep mode, no power door operations are possible.
Your best bet is to take it to the dealer or an ASE certified repair shop .

Feb 20, 2016 | 2003 Buick Park Avenue

1 Answer

Passenger door locks don't unlock.


You need to understand how they work , do you know about automotive electronic controls ? Your switches are just inputs to the BCM - body control module !
Door Locks Power and Ground
For door lock operation, the IP Fuse Block supplies battery positive voltage, through the 15 amp DR LK/TRUNK fuse, to the BCM. The BCM uses this circuit exclusively to apply power to the door lock actuators. The BCM is also supplied a ground circuit, which it uses exclusively to ground the door lock actuators. When a door lock is pulsed, the BCM internally connects these two circuits to the appropriate lock and unlock control circuits to actuate the locking or unlocking functions.
When diagnosing door lock malfunctions, these circuits must not be confused with the other battery voltage and ground circuits of the BCM. The appropriate wiring schematic must be used to locate the correct circuits. Failure to identify the correct battery voltage and ground circuits of the BCM during diagnosis of door lock concerns may result in misdiagnosis and unneccessary parts replacement.
Passenger Door Unlock Operation
When the BCM detects a transition of either of the door lock switches to the Unlock position, it switches the door lock actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the passenger door lock actuators transition to the Unlock position.
The door lock actuator unlock control circuits are dedicated control circuits used only for the passenger door lock actuators. This is done so that the driver door may be unlocked individually before unlocking the passenger doors using a keyless entry transmitter or an automatic door unlock function, if programmed. When the keyless entry transmitter is used to unlock the passenger doors, the BCM requires a repeated unlock command before it performs the unlock function. However, when the unlock input is from a door lock switch, a single unlock command is all that is required to unlock all doors.

How to test computer controlled door locks

Sep 12, 2015 | 2006 Pontiac Grand Prix

1 Answer

Driver door lock doesn t work


You need to test the parts. Does the switch have continuity when actuated? If yes, check the wires for continuity. Will the actuator work when you apply power directly to it? If yes, test the wiring.

Aug 16, 2017 | Dodge Caravan Cars & Trucks

1 Answer

Passenger door will not lock or unlock with key fob?


Passenger door lock is electronically controlled by the door lock actuator. You will need to replace the door lock actuator.

Jul 08, 2012 | 2003 Mini Cooper

1 Answer

2009 GMC Envoy - power door locks, power windows, fuel gauge not working, dome light isn't working


Do you know anything about automotive electronic's ? computer controlled systems ? There is electronic control modules in side the doors of your vehicle that control the operation of the windows an lock's , plus the instrument cluster is a module too . Your vehicle has about 10 different control modules and thet are all hooked on a serial data communication network ,to share info. The fuel tank sending unit in the gas tank is wired to the PCM - engine computer , The PCM sends fuel level info to the gauge in the instrument cluster on this serial data network . Your best bet ,take an have the vehicle checked out by a qualified repair shop .
The power door lock system consists of the following components:
• Driver Door Module (DDM)
• Passenger Door Module (PDM)
• Liftgate Module (LGM)
• Door lock relay
• Door unlock relay
• Body Control Module (BCM)
• Reversible door lock actuators in each of the doors
• LR/RR LOCKS 10A fuse (relay supply voltage)
• Door lock switches in driver and passenger doors (switches are integral components to the DDM and PDM)

Power Door Lock Operation
The power door lock switches are integral components of the DDM and PDM. The switches are two position normally open rocker switches. When placed in either the lock or unlock positions, the switches provide a direct input to the DDM or PDM. The DDM or PDM monitors these inputs and sends a Class 2 message indicating a change in the switch's respective position. Modules which activate the power door lock motors receive the Class 2 message and activate the motor in the appropriate direction to lock or unlock the vehicle's doors and liftgate. The modules which activate the power lock motors are:
• DDM (driver door lock actuator).
• PDM (passenger front door lock actuator).
• BCM (both rear door lock actuators).
• LGM (liftgate door lock actuator).
The DDM, PDM and LGM are directly connected to the respective door lock actuator through the door lock motor lock and unlock circuits. Once a door lock or unlock request has been received, the module will supply battery voltage to one side of the actuator and ground the other causing the doors to lock or unlock.

The modules probably have DTC'S - diagnostic trouble codes stored , these would point a auto tech in a positive diagnostic direction .

Oct 30, 2017 | 2009 GMC Envoy

1 Answer

My passage door won't open from the power lock u have to pull the lach up to get in so when u close it the sign say door open I try everything and it still didn't work what to do


Hello,
It sounds like you have a faulty actuator on the passenger door. The actuator is what raises and lowers the electronic locks.

Hope this helps you!
Donnie

Feb 24, 2011 | 2002 Volvo S60

1 Answer

Electric window 1991 F150 ...351


If the lock is trying to move, like you hear it but nothing really happens, replace the door lock actuator. i believe the windows are on the same fuse. Try removing the interior door trim and tap on the window motor lightly with a small hammer while holding the switch. If the window moves, replace the motor. If not, check for power and ground at the connector. If you have power and ground (which switch when going up then down) then replace the motor. If you dont, repair the circuit.

Aug 04, 2009 | 1991 Ford F150

2 Answers

Passenger door lock stuck


more than likely the door lock actuator is bad the multiplex unit sends a signal to the actuator to lock or unlock

Oct 09, 2008 | 2003 Honda Pilot

1 Answer

Single power door lock does not work


If it doesn't work from master switch then the door lock motor actuator will need to be replaced, this requires pulling the door panel.

Sep 20, 2008 | 2003 Toyota 4Runner

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