Volvo S40 The S40 is Volvo's most affordable sedan with all the amenities of a luxury sports car.

S40 Electrical issues

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Old May 25, 2026 | 07:27 AM
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sloppytypist's Avatar
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Default S40 Electrical issues

I'm having weird electrical issues on my 2011 S40.

I am testing with a multi-meter in between the positive terminal on the battery and the car battery connector/clamp.

When I first plug in the battery on the car after removing the positive battery terminal and I wait 30 seconds or so the draw is 70 milliamps, which would be fine. However...

When I turn on the ignition, turn it off, then wait about a minute the draw comes down to 370 milliamps.

When I pull fuse 18, which from what I read goes the to passenger side fuse box from the engine fuse box, it goes to 90 milliamps. It's a little higher than I would like, but doable.

I have pulled every single fuse out from the passenger fuse box and no change at 370 milliamps.

The last odd thing is that the lamp switch went in the full-on position has no lights and is dim in door open position when in drive. If I open the door with it in Open door position the light will turn off. Because it was behaving so oddly, I did remove the entire dome light assembly and no change in draw.

Obviously it could be two separate issues but just in case there's a known problem I figured I'd mention both since they're both odd electrical issues to me.

If any of you Volvo experts has thoughts on this, I'm all ears and thanks.

Doors are closed and in Drive.  The light should be off, but it is dimly on.
Doors are closed and in Drive. The light should be off, but it is dimly on.
 
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