I've got a 91 F800, L6 Brazilian engine with air brakes, that just got its rear wheel seals replaced. When I got it home I let it idle for a couple minutes and a chime started going off and the right most dash lamp illuminated, after a couple seconds the chime stopped, the lamp dimmed(but was still lit), and the speedometer seems to not work. This chime was not the low pressure buzzer, it sounded like a low coolant chime, but none of those lights illuminated. after looking in my shop manual, and I mean looking as in hours of searching because this brake warning light seems to not exist I found one table that gives a couple of causes that I think only related to the trucks with juice brakes(picture attached). The truck builds 120 psi still and releases like it should, it does everything it should do, except that dash light is still on and the speedometer doesn't work. I was just wondering if anyone else had something similar or if anyone knows what could cause a brake warning light to turn on.
Thanks
Thanks