Tesla brake lights

Tesla brake lights

Author
Discussion

velocemitch

Original Poster:

3,847 posts

227 months

Monday 6th December 2021
quotequote all
I was following a Tesla up the M1 this afternoon, for what ever reason the brake lights kept coming on time after time, as if the driver was tapping the brakes. For the two or three minutes I was following they must have come on 20 or 30 times. Not just downhill either but climbing and obviously on the power.

Is this a fault, a stupid driver, or some sort of regeneration system. If it’s the latter, then it’s frankly bloody stupid.

andy43

10,589 posts

261 months

Monday 6th December 2021
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Sounds like a fault if they’re coming on during acceleration, unless the driver is wearing clown shoes or diving flippers.
On regen on most EVs the brake lights come on as the car slows much more than a coasting ICE car - it’s a safety thing.

Tye Green

793 posts

116 months

Monday 6th December 2021
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standard for EVs when in regen mode - it's just to remind those behind in ICEs to judge traffic flow better, save fuel and prolong the life of their brakes wink

98elise

28,223 posts

168 months

Monday 6th December 2021
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andy43 said:
Sounds like a fault if they’re coming on during acceleration, unless the driver is wearing clown shoes or diving flippers.
On regen on most EVs the brake lights come on as the car slows much more than a coasting ICE car - it’s a safety thing.
Agreed, sounds like a fault.

MrGTI6

3,219 posts

137 months

Monday 6th December 2021
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Tye Green said:
standard for EVs when in regen mode - it's just to remind those behind in ICEs to judge traffic flow better, save fuel and prolong the life of their brakes wink
I thought it was Morse code for "please come past so I can make use of your slipstream".

velocemitch

Original Poster:

3,847 posts

227 months

Monday 6th December 2021
quotequote all
Could have been clown shoes, he was closer than he should have been behind another car, but it was definitely happening going up hill as well as down.
If it switches to regen mode and puts the brake lights on as soon as anybody lifts of the throttle, then Personally I think it’s a bit dangerous, it’s a bit like crying wolf, people will just tend to ignore them. It was incessant and really annoying even in poor daylight at night it would be like following a faulty Christmas tree.

Mr E

22,126 posts

266 months

Monday 6th December 2021
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There is a specification that details at what deceleration the brake lights come on.

Doesn’t mean the sensor on the car isn’t broken.

Dingu

4,359 posts

37 months

Monday 6th December 2021
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velocemitch said:
Could have been clown shoes, he was closer than he should have been behind another car, but it was definitely happening going up hill as well as down.
If it switches to regen mode and puts the brake lights on as soon as anybody lifts of the throttle, then Personally I think it’s a bit dangerous, it’s a bit like crying wolf, people will just tend to ignore them. It was incessant and really annoying even in poor daylight at night it would be like following a faulty Christmas tree.
Acting properly the regen will only activate the brake lights with sufficient retardation. So it’s not dangerous.

Cpb1702

419 posts

122 months

Monday 6th December 2021
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Was it Max Verstrappen brake testing you? Ha ha!

RobDickinson

31,343 posts

261 months

Monday 6th December 2021
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wont be clown shoes, touch the brakes it stops accelerating, this would be noticeable up hill....

velocemitch

Original Poster:

3,847 posts

227 months

Monday 6th December 2021
quotequote all
Cpb1702 said:
Was it Max Verstrappen brake testing you? Ha ha!
Nah, he didn’t swerve, can’t have been max!

SWoll

19,167 posts

265 months

Tuesday 7th December 2021
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If the guy in front is tailgating and constantly lifting off the throttle this will happen. Needs to drive like less of a tt I'd suggest and learn how to keep a consistent distance and throttle position.

I will add that having recently changed to a different EV I'm enjoying the ability to control the amount of regen based on the type of driving I'm doing. For around town I use the paddles to set maximum regen and essentially one pedal driving but for A-Roads/Motorways turn it off completely so the car coasts. Seems to work very well so far and makes it less likely you'll see the issue mentioned by the OP.

w8pmc

3,380 posts

245 months

Tuesday 7th December 2021
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Being a Newbie, I'd hazard a guess you encountered another Newbie as the same happens on our car.

Appears to purely require an adaptation of driving style as initially it feels like you're either accelerating or braking & that is somewhat off-putting. Just a case of learning this 'new' world of EV's/Tesla.

andy43

10,589 posts

261 months

Tuesday 7th December 2021
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Dingu said:
velocemitch said:
Could have been clown shoes, he was closer than he should have been behind another car, but it was definitely happening going up hill as well as down.
If it switches to regen mode and puts the brake lights on as soon as anybody lifts of the throttle, then Personally I think it’s a bit dangerous, it’s a bit like crying wolf, people will just tend to ignore them. It was incessant and really annoying even in poor daylight at night it would be like following a faulty Christmas tree.
Acting properly the regen will only activate the brake lights with sufficient retardation. So it’s not dangerous.
Yeah you can see on the little Tesla's backside on the dash display when the brake lights light up and it's only during full-on regen and even then it's not always immediate - slowing down from motorway speeds lights aren't on initially IIRC. Maybe the driver is more used to something with less power and uses the accelerator as a switch...