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Rear locks not working but front locks do - Cars & Trucks

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Considering no info on car year make or model good chance broken wire in drivers door in the rubber boot you see when you open the door

Posted on Jul 16, 2013

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Posted on Jan 02, 2017

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2002 Cadi Deville, can't get any locks to operate with remote or dash push buttons, the remote operates everthing but the locks! When the remote door lock is pressed, lites flash,horn blows locks not.


Power Door Lock Operation
The vehicle is equipped with power door locks. Each lock actuator is powered and controlled by the door module mounted in the individual door, but the rear integration module (RIM), which is the master control for the door lock system, determines when the lock functions are permitted. The RIM receives and examines the requested lock function from the individual door modules, or from the remote function actuator (RFA) via the class 2 serial data circuit. The RIM also examines the transmission shift selector position and the ignition switch position information available over the Class 2 serial data circuits. If the RIM determines that a lock or unlock function is permitted, it sends a class 2 message back to the individual door modules commanding them to perform that Lock or Unlock function.
Power Door Lock Components
The power door lock system consists of the following components:
?€¢
Driver door lock switch


?€¢
Passenger front door lock switch


?€¢
LH rear door lock switch


?€¢
RH rear door lock switch


?€¢
LH middle door lock switch (w/ V4U)


?€¢
RH middle door lock switch (w/ V4U)


?€¢
Driver door switch assembly (DDSA)


?€¢
Driver door module (DDM)


?€¢
Passenger front door module (PDM)


?€¢
LH rear door module (LRDM)


?€¢
RH rear door module (RRDM)


?€¢
Left middle door module (LMDM) (w/ V4U)


?€¢
Right middle door module (RMDM) (w/ V4U)


?€¢
Driver door lock actuator


?€¢
Passenger front door lock actuator


?€¢
LH rear door lock actuator


?€¢
RH rear door lock actuator


?€¢
LH middle door lock actuator (w/V4U)


?€¢
RH middle door lock actuator (w/ V4U)


?€¢
Driver door cylinder unlock switch


?€¢
Rear integration module (RIM)


?€¢
DRVMDL fuse (10-amp)


?€¢
PASS MDL fuse (10-amp)


?€¢
RRDR MDL fuse (10-amp)


?€¢
Class 2 serial data link

Sep 27, 2016 | 2002 Cadillac Deville

1 Answer

Why does my 4 wheel drive not work all the time?


Elaine,

not work, do tell what makes you think it dont work (a lamp) or tires slipping or dead tires. (by tires mean that and traction)??????????

what mode fails, of the many, and where.???????



first off, we dont know what your tires are touching.

on road, or off road. pavement or ICE or snow.

that matters big time . (you read manual and match MODE to Road)

your lost operators guide explains all that, right?

eg: how and when to use, 4wd, its all there. I promise.

ControlTrac 4-wheel-drive system



here are the mode. which one , gives you problems.



quote ford with comments.



What are the modes, and how do they differ?

(note this is the operational behavior of a 2008 Ford Expedition. Newer and older Expeditions will vary only slightly)



2H 2-wheel-drive with high range gearing (1.00:1) Rear-wheel-drive capability,

2-wheel electronic traction control system is enabled



4A 4-wheel-drive Auto with high range gearing (1.00:1) Full-time all-wheel-drive capability, ((best on pavement or any time)

Electronically adjusted torque split to front & rear wheels, Electronically variable center differential,

Front driveshaft & rear primary driveshaft allowed rotational speed difference,

4-wheel electronic traction control system is enabled



4H 4-wheel-drive with high range gearing (1.00:1) Part-time 4-wheel-drive capability, (not for dry pavement EVER)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled



4L 4-wheel-drive with low range gearing (2.64:1) Part-time 4-wheel-drive capability, (off road usage, mostly)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled, ESC and RSC are disabled



In 4A mode the center differential is electronically-controlled and rear drive wheel bias. The on-board computer monitors for any sign of rear drive wheel slip (loss of traction)

If loss of traction is detected, the center differential is told to send a share of the engine\'s torque to the front drive wheels. It will not let the front driveshaft turn at the same speed as the rear driveshaft.



What about traction management?

1997-2002 model Ford Expeditions offered an optional limited-slip rear differential (LSD). A conventional open rear differential was standard along with the conventional open front differential and the electronic locking center differential.

comment with out LSD, one tire can spin, on say ice.

but the other 3 tires dont, in full time.

Jul 04, 2014 | 2003 Ford Expedition

1 Answer

Unknown operation of the front diff.


please ask again.
are you asking a driveline question, and is vastly complex. read it.
awd?
off the wiki, , does this help,?
the Ridgeline is powered by a transversely mounted J35A9, (2006-2008) J35Z5, (2009-present) 3.5 L V6 with a five speed automatic transmission. The all-wheel drive system operates in front-wheel drive mode under normal conditions and automatically transfers power to either rear wheel via a locking differential when it senses a loss of traction in the front. The VTM-4 system can be locked in first, second or reverse gears at speeds under 18 mph (29 km/h).
The VTM-4 lock (rear diff lock) works in full rear power mode up until 6 mph (9.7 km/h) then it gradually transitions to power to the front and releases the VTM-4 lock at 18 mph (29 km/h)
.

Mar 02, 2014 | 2008 Honda Ridgeline

1 Answer

Master switch power window and locks


master switch faulty if other switches works windows and locks.

Jan 15, 2013 | 2006 Jeep Commander

1 Answer

The rear locks dont work with my key pad nor with the unlock button in the front but the fronts locks work


Not sure the rear make or model of this car but this sounds like you may have bad lock actuators, these are the small motors that lock and unlock the door locks. there is one in each door. good day,

Mar 23, 2012 | 2008 Chevrolet Impala

1 Answer

When i lock the hubs in and put it in 4wd the rear tires will go a full turn then lock up and then they go a full turn and lock up and the rear end works great when in 2wd


sounds like the gear ratio is different front and rear,tires all the same size?
If you want to check the ratio,just mark a spot on a tire ,roll the truck till the mark goes a full turn
while counting the number of times the driveshaft spins,should be the same front and rear.

Aug 07, 2011 | 1985 Chevrolet Chevy

1 Answer

Passenger front /rear windows will not work 99 jeep gr cherokee


ill suggest theres a broken wire between the drivers door and the body in that accordian looking thing.

Sep 06, 2017 | 1999 Jeep Grand Cherokee

1 Answer

2003 Chevy Avalanche rear doors won't lock automatically


The rear doors will not lock with the keyless remote, the drivers master switch

May 27, 2009 | 2003 Chevrolet Avalanche

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