Hi Jeff here is the test that Jomarkh wrote about that I did with my MG5 you don’t say which MG car you have but there is a thread called Regeneration brake lights which I’m sure is one that you started in May 1st 2021 same subject there is around 5 pages of comments on there
Sometimes I do not understand how this forum works in this regard same subject with more than one thread I have notice this on more than on this subject so I have copied below the test that I ran and what I found a few weeks back this was #44 in the other thread and read the comments there I tried every which way under normal day to day driving Conditions I’m convinced no they do not work and I don’t believe anything that a lot of dealers say anymore
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JoinedDec 15, 2020Messages292Reaction score242Points46Age74
WiganDrivingMG5 EV
DO BRAKE LIGHTS WORK IN REGEN? NO THEY DO NOT
Hi everyone just flicking trough so old threads on the forum yesterday and came across this one again about do the brake lights come on when the car is in regen
Well I can only speak for what I have found out today in my own MG5
This is what I did this morning I removed the cover for the high level brake light from inside the tailgate got at the wiring for the said light and connected an extra cable to it I then ran the cable through the car and connected a small beeper to the other end so now every time the brake light operates the beeper goes off and than went for drive to do some tests and this is what I found
1 the brake lights only work in TWO ways only, they come on when you press the footbrake (obviously) and the only other time they are on is when the GREEN (P) is ALIGHT in the dash, that’s when the auto hold button is alight the one marked (A) then the brake lights stay on until you move off again or select P when the parking brake is on in the dash there is a (P) in RED this is like the handbrake and the brake lights or not on in this mode
So to comfirm
I drove the car for several miles with this bleeper set up and tried every mode possible from 10-60 MPH and no matter if it was in Eco / Normal/or Sport and no matter which KERS setting I used in any of the modes the brake lights do not come on unless you use the foot brake in KERs 3 from almost 70 I took my foot off the pedal to get as much regen as possible still nothing from the bleeper
So Brake Lights Do Not work in Regen 1/2/or3
Pictures below
1 inside off tailgate high level brake light cover
2 cover removed
3 wiring and plug for high level brake light
4 extra cable now attached
5 sound beeper on sunvisor
Could have use a light bulb but the sounder was for better in daylight
Hope this answers some of the questions in the thread
As I said mine is the MG5
Les
Last edited: Jun 11, 2021
Jun 11, 2021