Author Topic: Interior Lighting Issue  (Read 108 times)

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Offline carl.allen96

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Interior Lighting Issue
« on: May 14, 2019, 03:26:36 PM »
Just wondering if anyone can shed some light, or even better a fix!

The other day I noticed my rear interior light wasn't working, when I pulled the unit down I saw that the connections had corroded. I tested the leads to see if power was to the unit, which there was, and then the ROOM fuse blew under the bonnet, which I replaced. As a result of that, no interior lights come on when the doors open, they did before the fuse blew, including the illuminated scuff plates and welcome lighting in the footwells.

I picked up a new rear interior light unit today from Mazda and just fitted it, hoping the problem of the interior lights not coming on would be fixed, but the problem is still there. I know the door sensors work so thats not the problem, Is there any other fuse I don't know about that may have blew relating to the interior lights? (They all come on if turned on manually)

Any help would be appreciated!

Offline StevenRB45

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Re: Interior Lighting Issue
« Reply #1 on: May 14, 2019, 08:59:40 PM »
I have a feeling the interior lights go via a circuit on the BCM as well as by the switch. Given they come on when you pull the key out, unlock a door from the inside e.t.c.

If you've fused part of the body control module fixing them will be a mission unfortunately. Something for a specialist auto electrician not a DIY job.

However not an expensive part on it's own..personally I'd go to an auto electrician and see what they say. I've seen people on various 3 forums swap the BCM and it not require any reprogramming so if its knackered might just be cheaper to swap it.

https://www.ebay.co.uk/itm/MAZDA-3-TAKUYA-BSM-CONTROL-MODULE-VP8ALF14B205JF-2011/112321229168
« Last Edit: May 14, 2019, 09:18:55 PM by StevenRB45 »

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Re: Interior Lighting Issue
« Reply #1 on: May 14, 2019, 08:59:40 PM »