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95 G20 chevy van. Power locks on front doors work; however, side and rear doors can not be lock or unlock. Wondering if it is a fuse and if so which one; or could it be the locking mechanism.
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The most likely culprit is a faulty actuator. You can test this by having someone activate the rear hatch while listening for a click or sound of some sort. If there is sound but no opening, it indicates a bad latch actuator. If there is no noise, it could be a fuse or wiring issue. You can manually unlock the door by removing the trim, but be careful around the glass latch as there are 2 push pins.
Check the wiring in the boot that runs from the body to the top of the liftgate for broken wires.
You might have to take it to a collision shop. Remove the rear hatch panel to gain access to the latch assembly if it's not responding. If you can't get it open, take it to a collision shop as they deal with these kinds of things regularly.
Gremlins ! HA HA HA sorry ! First off a little bit on how they work an what all is involved in making them work ! There are a few control modules in the mix , switches ,relays etc...
Door Lock System Components
The power door lock system consists of the following components:
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The driver door module (DDM)
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The passenger door module (PDM)
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The body control module (BCM)
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The driver information center (DIC)
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The rear door lock switch
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The door lock relay
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The door unlock relay
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The liftgate lock relay--utility vehicles with liftgate only
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The reversible door lock actuators in each of the doors and liftgate
Door Lock System Controls
The power door lock system can be controlled by any of the following:
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A power door lock or unlock switch activation
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A keyless entry transmission
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An automatic door lock function
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A delay lock function
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Door lock cylinder switch activation
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Lockout Prevention
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An airbag deployment
The front power door lock switches are integral components of the driver door module (DDM) and passenger door module (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 rear door lock switch provides a lock and unlock signal to the body control module (BCM). The BCM upon receipt of a lock or unlock signal will control the rear door lock relays and also send a Class 2 message to the DDM and PDM to perform the appropriate function.
The modules which activate the power lock motors are:
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The DDM (driver door lock actuator).
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The PDM (passenger front door lock actuator).
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The BCM (both rear door lock actuators and cargo door/liftgate).
The DDM and PDM 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 rear passenger and cargo doors differ slightly in that they use lock and unlock relays. The relays supply and coil sides receive a constant voltage through the battery voltage supply circuit. The normally closed contacts are connected to ground and the control side is connected to the BCM. Once a door lock or unlock request has been received by the BCM, the BCM will ground the control side of the appropriate relay. This energizes the relay and allows voltage to be applied to either the door lock motor lock or unlock circuits. since the other side of the door lock actuator is connected to the normally closed contacts of the opposing relay to ground, the doors lock or unlock.
The first place to start is have a factory or equivalent scan tool hooked up , one that can read BCM DTC'S - diagnostic trouble codes ! This could lead to a fix faster ! Watch these three videos ! Door Locks Go Crazy 1
The ABS module is not under the hood.It is under the van floor on the passenger side at about the middle of the van.Slide under the Van at the passenger side cargo door and look up.
look at fuse box behind drivers seat, as well as under dash in front of drivers seat,,all top lights,and mood lights behind drivers seat, small door on side of van apx 2 feet back of drivers seat
Do the power windows work ? DDM - driver door module fuse 15 amp - location is the instrument panel fuse box , plus LT DR circuit breaker 25 amp. Circuit breakers rarely go bad . The power locks are controlled by electronic's .The passenger side has another power supply ,that's why they still work .
Door Lock System Components
The power door lock system consists of the following components:
• The driver door switch (DDS)
• The passenger door switch (PDS)
• The body control module (BCM)
• The driver information center (DIC)
• The rear door lock/unlock relay (LBEC)
• The reversible door lock actuators in each of the doors and liftgate
The front power door lock switches are integral components of the driver door module (DDS) and passenger door module (PDS). The switches are 2 position normally open rocker switches. When placed in either the lock or unlock positions, the switches provide a direct input to the DDS or PDS. The DDS or PDS monitors these inputs and sends a LAN message indicating a change in the switch's respective position. Modules which activate the power door lock motors receive the LAN message and activate the motor in the appropriate direction to lock or unlock the vehicle's doors and liftgate. The rear door lock switch provides a lock and unlock signal to the body control module (BCM). The BCM upon receipt of a lock or unlock signal will control the rear door lock/unlock relay and also send a LAN message to the DDS and PDS to perform the appropriate function.
The modules which activate the power lock motors are:
• The DDS (driver door lock actuator)
• The PDS (passenger front door lock actuator)
• The BCM (both rear door lock actuators and cargo door/liftgate)
The DDS and PDS 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 rear passenger and endgate doors are controlled by the BCM through the rear door lock/unlock relay which is incorporated onto the printed circuit board in the LH BEC. The BCM controls the unlock relay by providing ground to energize the coil and controls the lock relay by providing battery voltage to energize the relay coil. The energized the relay and allows voltage to be applied to either the door lock motor lock or unlock circuits. Since the other side of the door lock actuator is connected to the normally closed contacts of the opposing relay to ground, the doors lock or unlock.
It's possible you have broken wire or wires inside the flex boot from the body of the vehicle to the driver's door . This happens a lot .
Fuse Block - I/P instrument panel
Left of the I/P behind the side trim panel
Instrument Panel Fuse Block The instrument panel fuse block access door is located on the driver side edge of the instrument panel.
Pull off the cover to access the fuse block.
The vehicle may not use all of the fuses shown.
Fuses Usage 1 Rear Seats 2 Rear Accessory Power Outlet 3 Steering Wheel Controls Back light 4 Driver Door Module 5 Dome Lamps, Driver Side Turn Signal 6 Driver Side Turn Signal, Stop lamp 7 Instrument Panel Back Lighting 8 Passenger Side Turn Signal, Stop lamp 9 Passenger Door Module, Driver Unlock 10 Power Door Lock 2 (Unlock Feature) 11 Power Door Lock 2 (Lock Feature) 12 Stop lamps, Centre High Mounted Stop lamp 13 Rear Climate Controls 14 Power Mirror 15 Body Control Module (BCM) 16 Accessory Power Outlets 17 Interior Lamps 18 Power Door Lock 1 (Unlock Feature) 19 Rear Seat Entertainment 20 Ultrasonic Rear Parking Assist, Power Liftgate 21 Power Door Lock 1 (Lock Feature) 22 Driver Information Centre (DIC) 23 Rear Wiper 24 Cooled Seats 25 Driver Seat Module, Remote Key less Entry System 26 Driver Power Door Lock (Unlock Feature)
It's a very common problem. A greasy and temp fix is to press the thumb button on the handle, then take your finger and lift the top locking lever in the door mechanism that has fallen down to prevent the striker from closing both levers. This will not fix the problem. Most likely the striker (the bolt that the lock affixes to) has lost the vinyl sleeve and has damaged the lock from repeated use. You may have to replace the mechanism which isn't to hard to do if you can swing a wrench.
i can help , kinda, i had trouble with my astro van door lock in the back , it is not connected to the electric door locks , turns out the thing was broke inside, i had to pry off the inside panel and reach inside the door itself to unlock it, this can be done without damaging the panel or trim but you have to unscrew some parts, and work it loose very gently, on the rest of it, well i have been having trouble with the door locks on my astro, i think its just a weakness in design on these guys
You actually have two separate problems. The brake pull to the right is indicating the left side brake is not working properly. You will want to remove the left front wheel, collapse the caliper piston and make sure the caliper is floating freely on its mounts.
With the piston collapsed you should be able to slide the caliper inboard and outboard of the rotor. If not, you will want to remove the attachment pins, clean and lubricate the pins. If they are grooved or worn you will have to replace them.
The second issue of the ABS light is indicating the system has detected an electrical sensing or control problem. Take the vehicle to your local Auto Zone or Advance Auto and ask them to scan the vehicle for trouble codes. They will scan it for you at no charge.
Chances are you will find a wheel speed sensor problem at one of the wheels.
Write the codes down and respond back, we can start diagnosing the problem,
Good luck, let me know.
Regards,
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