You have lost a diode in your alternator. You are getting a small charge, but below what you need to run the truck.
I just done 60 miles on red light in a 1999 ford transit van
You need to have the system checked for codes. You will then know why the light is coming on.
You use a scan tool to check for codes. Then you know what to test.
might be throtle postioning sensor
Trucks - 1999 Diesel Power Upgrades was released on: USA: September 2013
The light is telling you that your brakes are not working properly, which could be dangerous. Your best bet is to get it to a mechanic who can analyze the problem.
I changed the batter its a new one, got a new alternator. when I drove it home last night it wasn't on. then I goe to the store the morning and the light came on and the handle went blow the batter symbal
Contact the great guys at bongo.com and ask them to send you PDF of how to read the codes.
OIL level low, dirty oil filter.
What causes ticking, check engine light, and the check gauges sensor to come on in a 1999 Dodge Durango 5.2L SUV?
Bring to a shop that has an ABS scanner to determine the problem
I have a 305-70-16 on my stock 99 f250 diesel.