Renault laguna tailgate not opening all doors ok and rear window with wiper ok

May hava control body module issue..scan car ata partstore. Try disconnectn computer n cleaning plug or unhook batt few min..sensitive electronics

Locking/Unlocking the doors from the outside
This is done using the RENAULT Card; see the "RENAULT Card" information in Section 1.
In certain cases, the RENAULT card may not work:
- if the RENAULT card battery is weak, flat, etc.
- if equipment operating on the same frequency as the card (mobile phones, etc.) is used;
- vehicle located in a high electromagnetic radiation zone.
It is then possible:
- to use the key integrated into the card to unlock the front left-hand door;
- to lock each of the doors manually;
- to use the interior door locking/unlocking control (refer to the following pages).
Using the key integrated in the RENAULT card
Insert key 1 into the lock in the driver's door and lock or unlock. Locking the doors manually
Turn screw 2 with the door open (using the end of the key) and close the door.
This means that the doors are then locked from the outside.
The doors may then only be opened from the inside or by using the key in the front left-hand door. Interior locking/unlocking door control
Switch 3 controls the doors, boot and, depending on the vehicle, the fuel filler flap simultaneously.
If a door or the tailgate is open or not closed properly, the doors and tailgate lock/unlock quickly.
If you need to transport objects with the boot open, the other opening elements can still be locked: with the engine stopped, press switch 3 for more than five seconds to lock the other opening elements.
Locking the doors without the RENAULT card
For example, in the event of a discharged battery or the RENAULT card temporarily not working, etc.
With the engine switched off and an opening element (door or boot) open, press and hold switch 3 for more than five seconds.
When the door is closed, all the doors and the tailgate will be locked.
Unlocking the vehicle from the outside is only possible with the RENAULT card in the vehicle's access zone or using the key integrated in the RENAULT card.
Door and tailgate status indicator
With the ignition on, the warning light integrated in switch 3 informs you of the locking status of the opening elements:
- indicator light on, the doors and tailgate are locked,
- indicator light off, the doors and tailgate are unlocked.
When you lock the doors, the indicator light remains lit and then goes out.

sounds like the cable has snapped which pulls the window up and down the runners. you can get the kit from ebay look for RENAULT LAGUNA 2 ELECTRIC WINDOW REGULATOR REPAIR KIT there is one company that even give you an instructional video to follow, really not that hard to do, have done several now for myself and friends

frozen motor. remove a rear door cover, and turn on rear wiper and listen for motor noise, also check fuse

It is a micro switch and it's in the door latch on the door. If you use the side of a screwdriver blade to push the bit in the latch right up on one of the doors that have working switches ie door light coming on, door open coming up on the dash you will see that the light etc goes out. It's the same for the the laguna 1 and the Laguna 2. All I did to correct the problem on my Laguna 2 was spray loads of WD40 in the latch and it started to work but only for a couple of months so I am getting a latch from the breakers. I can only hope it has a good switch in it.

Probably the switch you press to open the tailgate

Renault Laguna II Key Remote Control Programming
LAGUNA II INFRA RED RESYNCHRONISING
1. Turn the Ignition OFF.
2. Press the central door locking button for more than 5 seconds. Note: the door should lock then unlock.
3. When this happens 15 seconds is allowed and the immobiliser warning light illuminates.
4. Point the 1st key at the receiver and press the button once, the doors should lock and unlock.
5. Point the 2nd key at the receiver and press the button once, the doors should lock and unlock.
6. Check the remote control unlocks and locks the doors.

solonoid in boot lid broke or wires broke where wires leave body in a ribber sheaf and go into tailgate.open from inside then investigate further

Check in your user's manual for your fuse location on the rear windshield wiper. These grand cherokee's have electronic actuators in every door. Inside these actuators they have very little motors and move everything via plastic. Very bad design flaw, as most of these actuators are 300-400 dollars to replace. You can find ones in salvage yards for 50 though. On your rear hatch, the door and the window are run by this actuator.