Cabin Light not working at night

[haze10]

So my interior cabin light comes on fine during the day, every time I open the door. But for some reason it doesn't come on at night. Definitely not in deep sleep mode as driving the truck daily. Any ideas.

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[Glen Baker LLC]

Gary,
Are you still running the original 12 volt battery?

 

[haze10]

Yes. But never drained the battery and truck is only 18 months old with 10K miles. If the battery, why work during the day and not at night?

 

[Glen Baker LLC]

Does it happen every single time?

 

[haze10]

so far yes, it never seems to come on at night but does during daylight.

 

[Master Blaster]

Your OEM battery is sulphated and about to die completely. I'll bet it measures below 12.0V after an overnight sleep. Have you had all your recalls and SSM53801 for the a/c power leak fixed?

 

[Glen Baker LLC]

so far yes, it never seems to come on at night but does during daylight.

A while back I noticed this.
At night if I come home and I'd manually turn off my headlights. In the morning when I get in my Maverick before I put the key in the ignition the interior lights will not come on.
Once I start the truck the headlights revert to the AUTO Default and the interior lights will come on when the door is opened.

 

[Chopperbobc]

There is something else that controls the cabin lights, but I don't know what it is.....after a few days of not running my cabin lights fail even though my 12 volt AGM battery is at 12.6 volts..... can someone explain why this happens....ty Bob

 

[Master Blaster]

The only other thing that controls the cabin lights is the 3-position switch in the centre of the roof console. It is normally in the centre position.

 

[Chopperbobc]

Mine is always in the middle position and this happens many times....

 

[MaverickMark]

So my interior cabin light comes on fine during the day, every time I open the door. But for some reason it doesn't come on at night. Definitely not in deep sleep mode as driving the truck daily. Any ideas.

I got the sleep mode notice everyday and I drove the truck everyday. I think it's your battery too.

 

[Master Blaster]

Your battery is totally toast. I think that at night with the extra headlight and taillight loads, the voltage is decreasing from your dead battery to the point where the system is going into self-preservation sleep and not turning on the nonessential interior light. During the day you are just above that trigger level and the light will go on for a short period.

 

[boxster03]

it makes no difference that your truck is new or you drive it daily - deep sleep mode is an issue with bad software engineering causing a constant drain on the battery and the battery not fully charging when you do drive it - you can change the battery that may or may not "fix" the issue

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