I have a 87 Pontiac TA with a digital dash. The problem that I have is that 90% of the time I am in the car the system check part of the car above the mileage part and radio shows front lamp and then F lamp. I have no idea what it is but I think that it might be linked to this other prolem. That is that about 60% of the time I am in the car the digital part that shows the mileage is not showing. I came to a conclusion that when it is not on it doesn't recond the miles. Are these two things related? I need help!!