Rear Lights

[staffy460]

had this on mine , was brake light switch near the brake pedal

[stuart bowes]

I did ask if it was sides or brakes and OP seemed convinced it was side lights

Brakes would make more sense being rears only but there we go

[cjsv70est]

Originally Posted by stuart bowes

would it not be the REM (rear module) because it's only the rear lights

fingers crossed it is because it's a whole lot easier to get at..

someone else would have to confirm how the lighting is connected up though I may be wrong

Thanks for help, Only the rear lights come on when the vehicle is stationery & when the alarm s set or not. This happens after the vehicle has been parked for at least 5 minutes.
The only way at the moment to prevent this is to disconnect the battery. getting to be peed off with this now

[cjsv70est]

Originally Posted by staffy460

had this on mine , was brake light switch near the brake pedal

I will check the brake light switch but as it is the side lights I do not think it will be that. Thanks anyway

[cjsv70est]

Originally Posted by JoeNinety

On Range Rovers this symptom was the brake light switch behind the brake pedal. Worth checking this is OK

I will check but as it is only the 'side lights' that come on I do not think so.
Thanks for the thoughts.

[VOLVOBOY]

OP.
Hi,
This really seems like a wiring issue . As Stuart says a short , a bad or wrong relay , or duff REM which is not un-common. It could be a bad ground /earth.
Can you clarify , is this only happening when the car is locked ?
A well known favourite is a broken wiring loom in the tailgate hinge.
The 5 min thing is the clue here..

[cjsv70est]

VOLVOBOY
Thanks for your suggestions.
The lights come on whether locked or unlocked & only after about 5 minutes.
It is the Rear Side Lights only, that light up. Normal running, all lights are on (front & rear)
I will check the wiring loom asap.

[stuart bowes]

just as a total shot in the dark I would probably email these guys https://volvodiagnostic.com/en/contact-us and ask them if it's something they've heard of

if it's fault with a module they can probably repair it for you, if not they might suggest places to look in terms of wiring

personally as a temporary measure I'd probably leave the inner trim off because it makes access awkward, then just take the lamps out rather than disconnecting the battery.. at least that way you could still lock your doors (inc. tailgate)

if you're tracing wiring you'll no doubt have to take all the plastic bits off anyway

[VOLVOBOY]

So something is powering up or pole-ing over 5 mins after switching off and removing the key....
My first instinct was the lock / deadlock circuit ...
The second is alarm / immobilizer...
The third is system module shutdown...
You really need to identify which circuit is causing the problem . It`s easy to be drawn in to the fact that the rear lights are working incorrectly so this must be the problem area. But the rear light circuit may be fine and it is another circuit that is at fault and is affecting the lights...
I don`t know the history of the car but i suggest that firstly go over it looking for anything that has been added , altered and remove it back to stock...
Look for any repairs and check them over...
Isolate the alarm system as much as possible ( pull fuses ,relays) and see if that makes a difference...
After that your into wiring diagrams and circuit testing territory...

[cjsv70est]

Originally Posted by VOLVOBOY

So something is powering up or pole-ing over 5 mins after switching off and removing the key....
My first instinct was the lock / deadlock circuit ...
The second is alarm / immobilizer...
The third is system module shutdown...
You really need to identify which circuit is causing the problem . It`s easy to be drawn in to the fact that the rear lights are working incorrectly so this must be the problem area. But the rear light circuit may be fine and it is another circuit that is at fault and is affecting the lights...
I don`t know the history of the car but i suggest that firstly go over it looking for anything that has been added , altered and remove it back to stock...
Look for any repairs and check them over...
Isolate the alarm system as much as possible ( pull fuses ,relays) and see if that makes a difference...
After that your into wiring diagrams and circuit testing territory...

I think it is time for an electrician, I am at a loss, tried Volvo Diagnostics but my message will not go.

Thanks everyone for your help and ideas.
C