2005 S40 electrical issues

FloridaS40guy · Post by **FloridaS40guy** » 15 Feb 2018, 10:14

EDIT: Oops. Posted in wrong S40 forum. Moderators or admins please delete. I will re-post in appropriate forum.

My '05 S40 had the all to common issues with water in the floorboards from the sunroof hoses being clogged.
Unfortunately - I didn't catch it right away and the water stood in the car for a few days.

That issue has since been rectified, but I now have some electrical issues and I was told there is some sort of ECM or DIM module mounted under the carpet which may have been damaged. (lately I've had headlights go out and come back randomly - they both always work when the car is first started. There have been other such issues in the past since the water damage.)

Could anyone confirm that this module location is true and recommend a cheap fix?

Thanks in advance for any tips and information!

Post by **alschnertz** » 15 Feb 2018, 14:38

This probably isn't much help, but I don't think there is anything "mounted under the carpet".

I recall headlight issues being associated with a bad CEM(?) that is located on the left side footwell hidden behind the drop-down panel.
Sorry, but that's all I've got.

Edit: I just realized you're asking about an '05 w/ AWD. My comment was directed at Phase 2 generation.

Post by **mrbrian200** » 15 Feb 2018, 16:01

No modules under the carpet. The CEM on the '04 is below the glove box/above your feet on the passenger side. What is more likely giving you trouble are the ground connections that are just an couple inches above the floor at the A pillars. You have to remove the interior plastic trim around the doors to get to them. There are at least 2 ground wires attached with a screw on each side toward the front of the door openings.