V70: Electrical Intermittent failure of boot lock,rear wiper,flashing brakes

[Johnny Kebab]

I’ve had this exact problem for a few months now and haven’t been able to find a cause. I know the plugs on mine are fine, I’m going to give the earth a go and see what happens.

Minibull, if you do find anything please post up. I’ve been close to buying a gallon of petrol and a box of matches with this.

Johnny Kebab

[minibull]

Originally Posted by Johnny Kebab

I’ve had this exact problem for a few months now and haven’t been able to find a cause. I know the plugs on mine are fine, I’m going to give the earth a go and see what happens.

Minibull, if you do find anything please post up. I’ve been close to buying a gallon of petrol and a box of matches with this.

Johnny Kebab

I think it's possibly a broken/damaged earth wire as I have no fog or reversing lights either. When I press the button on the door to try to open it one of the numberplate lights goes out.

[minibull]

I had a look at the problem this morning and found if I moved the wires to the grey connector the tailgate would open and other functions returned, but fully closing the tailgate again would bring the faults back. Further checking traced the bad connection of a black and orange wire, is it a common earth, I dont have a wiring diagram to check?
I noticed that when the tailgate opens it pulls on the wires and moves the connector, so for now I have unclipped the grey connector from the roof to take any strain off it being pulled and will rewire it later.

[apersson850]

Yes, orange/black is earth. I remember that without looking at the wiring diagram.

The number plate lights going out when something else is operated is a typical example of a ground fault.

[Johnny Kebab]

Minibull, how did you get on, any updates? I had an auto electrician look at the plugs too and rewire the earth... and it works! The boot and all the lights now work properly. The only problem I have now is that when the boot shuts its not closing 100%. It used to close and almost wind itself in. Now its stopping as though it's just caught on the latch.

Did anyone else have this problem?

Johnny Kebab

[apersson850]

It's two separate things, closing the gate and pulling it in the last distance. The latter also manual gates do.

[Johnny Kebab]

Originally Posted by apersson850

It's two separate things, closing the gate and pulling it in the last distance. The latter also manual gates do.

I assume they’re linked though as it was doing both previous to earthing problem?

[minibull]

Johnny Kebab, not had chance to rewire it yet but everything is still working as it should.
Is there any adjustment on the door latch/catch, all the pulling and pushing on the door may have moved it out of line.

[apersson850]

The two motors use the same ground. One closes the hatch, the other then pulls it into the lock and locks it.
Depending on the rear hatch adjustment, you can see the last movement being separate from the first on some cars. On other cars, it's hardly noticeable.
We have two XC70, both with electrically operated tailgate. The closing process works quite different on the two.

[Johnny Kebab]

Originally Posted by apersson850

The two motors use the same ground. One closes the hatch, the other then pulls it into the lock and locks it.
Depending on the rear hatch adjustment, you can see the last movement being separate from the first on some cars. On other cars, it's hardly noticeable.
We have two XC70, both with electrically operated tailgate. The closing process works quite different on the two.

Mine isn’t pulling in at all, it sounded like 2 separate functions before the earth was redone. How do I go about adjusting it?