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Discussion Starter · #1 ·
Hi all,

The interior lights of my 2005 vw t5 transporter are not working (bought the van like that). There is no voltage across the pins in the connectors connecting the lights in the ceiling, this for all lights.

In my trouble shooting I first checked all the fuses: the fusecard mentions fuses for the interior lights at fuse #7 and #29. At #7, there is no fuse installed and no connectors for a fuse. Fuse #29 is fine.
At first I tought the connectors of #7 were pushed trough the fuse box, dismanteled the dash board to find there never were any fuse pins.
Fuse #29 is described as "Load area door signal relay". Does this mean the interior lights are controlled by a relay or is it controlled by the bmc as suggested in other forum posts?
I also checed the connections under the drivers and passengers seat, they seemed to be fine. The connections in the light fixtures are also fine.

I think that there's a faulty connection between between the fuse box and the connectors to the light fixtures. What should my next trouble shooting steps be? If the lights are controlled by a relay, can it be broken?

Thanks in advance
 

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I'm not sure why your fuse card shows SB29 as "interior light". As far as I can tell that fuse supplies the dual inverter relay, which is for the locking system, not the lighting.

To be completely unambiguous you need to say which of the two fuse panels under the centre of the dash you are referring to - the upper panel is SB and the lower is SC.

The situation is not simple because the lighting is controlled by the main BCM, and that has multiple supplies to it, and a blown fuse on any of those supplies can affect several outputs.

Firstly I would recommend that you check SC17 (in the lower fuse panel, 7.5A). If that's Ok, the next thing to do is to check all of the fuses that supply the BCM. The easiest way to do that is to check all of the fuses! It should not be too time consuming, as the factory standard fuses should have two test points on the front, so you don't have to take them out to test them.
 

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Discussion Starter · #3 ·
I'm not sure why your fuse card shows SB29 as "interior light". As far as I can tell that fuse supplies the dual inverter relay, which is for the locking system, not the lighting.

To be completely unambiguous you need to say which of the two fuse panels under the centre of the dash you are referring to - the upper panel is SB and the lower is SC.

The situation is not simple because the lighting is controlled by the main BCM, and that has multiple supplies to it, and a blown fuse on any of those supplies can affect several outputs.

Firstly I would recommend that you check SC17 (in the lower fuse panel, 7.5A). If that's Ok, the next thing to do is to check all of the fuses that supply the BCM. The easiest way to do that is to check all of the fuses! It should not be too time consuming, as the factory standard fuses should have two test points on the front, so you don't have to take them out to test them.
Thanks for the reply! So Many things I have to learn.
Below is a picture of the upper (SB) fusecard in my van.
187053

I will check all the fuses and hope it is as simple as a blown fuse.
Thanks again!
 

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Looking at my 2005 fuse cards SB7 is shown as an interior light fuse, (15A) but SB29 is blank on the card, i.e. spare.
There is another fuse to check, which is SC24, (7.5A).
 
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