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For some reason, every time I step on brakes in my 2020 GWM Steed, the light-bulb symbol appears and the dash screen lights up. This all occurred when a taillight blew. Coincidence? I replaced tail-light, but it still happens. As soon as I step off the brakes, it’s all good. I do have a head-light that is defective as well.
The light-bulb symbol is trying to tell you that you have a globe that has blown. But if that’s the case, the symbol should be lit the whole time, not just when you apply the brakes. I’d suspect a short-circuit of some kind, but I’d start with checking all the car’s earths. A bad earth can cause all sorts of random electrical mayhem to occur, including false alarms of the warning lights. That said, if the car has a blown head-light, try changing that to see if the warning symbol goes away for good.
An auto electrician might be your best bet if the problem continues. Chances are, a good auto sparkie will have seen this very problem many times before.
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