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Old 03-16-2019, 05:21 PM   #1
rajjinator
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Default Brake lights working with key off

I was changing the brake servo on my 1994 940 and noticed that the brake lights were working with the ignition switched off! Is this normal, or has someone bodged a permanent 12v feed to the brake lights for some reason?
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Old 03-16-2019, 05:34 PM   #2
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Yes, they light up when you step on the brake even with the ignition switched off.
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Old 03-17-2019, 04:43 PM   #3
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Quote:
Originally Posted by rajjinator View Post
I was changing the brake servo on my 1994 940 and noticed that the brake lights were working with the ignition switched off! Is this normal, or has someone bodged a permanent 12v feed to the brake lights for some reason?
Most cars are wired to permanent 12v feed on the brake lights.
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Old 03-17-2019, 10:45 PM   #4
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Ask your local law enforcement folks about this. They'll probably tell you some good tales of young kids trying to avoid the police. The kids successful got away briefly, pulled into a driveway, shutoff the lights and car, and waited for the police to go by. But they got caught anyway because they didn't take their foot off the brake while trying to hide.
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Old 03-17-2019, 10:56 PM   #5
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Every car I've been in does that. Even my '63.
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Old 03-18-2019, 03:10 AM   #6
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Every car I've been in does that. Even my '63.
I haven't noticed this on any of the "modern" cars I've been driving at some point though (Audi, Skoda/VW, Fiat) but it might be a regulatory thing...?
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Old Yesterday, 05:15 AM   #7
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Thanks for the replies! I have never noticed this on any car i've owned till the volvo. I've not really been looking though!

So it's normal! Thanks all!
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Old Yesterday, 09:13 AM   #8
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I have about a 50% chance 50% of my brakes lights work in the 242 key on or off, har har
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Old Yesterday, 10:05 AM   #9
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Quote:
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I have about a 50% chance 50% of my brakes lights work in the 242 key on or off, har har
Gotta love the old bulb sensor light, If it is lit a bulb is out. If it is not either they all work, or none do........

I keep my jackhandle under the seat, some think it is for self defense, nope. It is the perfect length to put between the seat and brake pedal to apply the brake so i can go back into the trunk and spin the bulbs till they work, no helper necessary.
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Old Yesterday, 02:32 PM   #10
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Some cars are this way, some aren't. Modern VW for sure needs the key on. Old Volvo.....nah
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Old Yesterday, 02:50 PM   #11
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this thread reminds me of growing up in a household that only drove SAABs or Volvos. I was DRIVING before I realized that every car didn't turn the headlights off with the ignition. It made no sense to me.
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