Disco 2 Door locks

hi, I know these kind of questions have been asked before but I cannot sort this one. After parking on a steep drive on Portland last week my car alarm went off at 11.30 at night. No sign of anybody etc so just left the car unlocked. Next morning there was 2ater dripping from the rear view mirror even thou it had been dry for days. The B with the arrow next to tripometer was also flashing. Since then I have changed the battery and reset with at AKA code. Problems I have is only the drivers door opens with remote. The rest lock by remote but won’t open. Dash switch works only with drivers door. Today we swapped the bcu with a spare, no change. Took out the roof sensor which was clean and dry. Relays are working and fusebox dry.
There is 12v at the door solenoids. The locks try to work but won’t . Seems they are deadlocked but they work manually with handle.sorry to ramble but every time I fill the boot I have to crawl in to open rear door.

alanpickering said:

There is 12v at the door solenoids.

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yes cos the command is on the earth path

alanpickering said:

The locks try to work but won’t

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If they try to work the problem is not with the BCU cos it means it gives the command, all those doors are on the same circuit and the driver's door on other, you'll kave to remove all the door cards and unplug the actuators one by one and try with one unplugged and others connected cos one of them might create a voltage drop on the whole circuit, if the other 3 will start to work with one unplugged replace that actuator, check the looms where they are entering the doors too cos if one is chaffed it'll affect the others too... pray to be that otherwise it can be a contact issue in one of the involved header joints and all are quite hard to reach

alanpickering said:

Seems they are deadlocked but they work manually with handle

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deadlocked means they dont work with the handle

Hi, have tried that, removed all connections on everyone except drivers, no change, can here them trying to pop up but just click, where are the header connections please

In RAVE - Electrical library ...though better replace one actuator for test and if that will work it means you need them all, not uncommon ,,,

just confirm, you unplugged one and tried with all the others connected, no joy then plugged that back unplugged another and so on?

Thanks sierrafery
I’ve tried everything I think, today I removed the electrics again and tried all different combinations with no joy. I’ve stripped off the cover to the front footwell. I believe from looking at the electrical diagram these are the header connections as the colour codes are the same. These look bone dry and in good condition. I cannot believe all four would fail at same time, there must be a break somewhere but the rear door which we put multimeter on is showing current on all legs

It's possible to be a short in the wiring then which causes voltage drop... check the wiring loom where it passes between the tail door and the body to not be chaffed

Thanks,
I will strip the covers back and check on Thursday, let you know how I get on.

After reading all the blogs, I’ve decided to change the fusebox in case the internal relays have gone, I’ve been getting water in at the top of the door pillar so can only assume it found its way down to the fusebox