Thread: No power to 12v aux socket & phone integration

You could check the relay. More familiar with the D4 but likely to be R1 or R3 behind the glovebox.

Originally Posted by rufusking

You could check the relay. More familiar with the D4 but likely to be R1 or R3 behind the glovebox.

Sorry to be a pain but ... got the R1 & R3 out ... how do you check their serviceability?

Those relays disconnect the supply to the lighter sockets at some time after the vehicle is switched off or locked and switch back in when a door is opened or vehicle is unlocked. Generally referred to as Battery or Power Saver relays.
If you don't have any test equipment (multimeter, power source & load/globe) pop them back in, sit in the car, close all the doors and lock it (or wait a couple of minutes). With your finger gently on the relay you should feel a light click as it connects or disconnects. You may even hear it but there are a number of other things that switch on and off so it may be hard to tell which one it is.
Unlock the car or open a door and see if you can feel if activate.

Originally Posted by rufusking

Those relays disconnect the supply to the lighter sockets at some time after the vehicle is switched off or locked and switch back in when a door is opened or vehicle is unlocked. Generally referred to as Battery or Power Saver relays.
If you don't have any test equipment (multimeter, power source & load/globe) pop them back in, sit in the car, close all the doors and lock it (or wait a couple of minutes). With your finger gently on the relay you should feel a light click as it connects or disconnects. You may even hear it but there are a number of other things that switch on and off so it may be hard to tell which one it is.
Unlock the car or open a door and see if you can feel if activate.

Thanks for your help here. I tried what you suggested but to no avail ... couldn't feel any clicking in either R1 or R3 when I opened the door but interior light comes on. Tried it several times and now discovered to my chagrin .. the reversing camera video screen now tells me it's got 'No Signal'. I'll get a sparkie out to have a look.

Really appreciate your help.

Someone familiar with the D3/4 and has a good OBD diagnostic tool will make the job quicker and cheaper. More likely a fault/s will be logged. They tend to cascade so the earlier fault hopefully will lead to the root cause. Good luck.

It will most likely be a fuse as the Dealer fit phone system takes power from the power socket under the centre console.
Topic says fuse 19 in the CJB.
Check that & see how ya go.

HTH
Cheers

Originally Posted by sniegy

It will most likely be a fuse as the Dealer fit phone system takes power from the power socket under the centre console.
Topic says fuse 19 in the CJB.
Check that & see how ya go.

HTH
Cheers

Thanks sniegy
Alas fuse 19 seems to be intact so looks like I'll be following 'rufusking' suggestion to get someone with D3 experience with an OBD tool to investigate.

Maybe try swapping in a different fuse or a new fuse anyway? It can be hard to tell just visually if the fuse is ok and a fuse is cheap. Alternatively, check with a multimeter to the test points on the fuse.

Scott