Depending on the Issue
If you switched tires recently or went to an alt size or even veh desc was lowered it could affect all those components
P225/55R16 94H
the speed rating or the size could affect your veh handling or components
if going out of rec tire size or speed rating will affect the vehicle
http://www.angelfire.com/tx2/mannyyy/ipwriteup.html
Bad brake light switch
Brake switch needs replaced.
you need to replace the brake light button under the brakes inside the car
it means your day time lights are on.
There are several things that can cause your 2000 Cadillac dashboard lights to quit working. The most common cause is a blown fuse.
if the cluster still lights up but the speedo still inop possible cause is the speed sensor in the transmition
What lights? dash? Floor? roof? trunk? a car has a lot of lights you know? Anyway just remove any parts in the way and replace the bulbs. Duh.
If the speedometer and brake lights aren't working then you should change the fuse. If that doesn't work then check the electrical system associated with your Heritage.
It depends. You may need a new Brake harness. It's an electrical problem you have ti get it looked at.
Sounds like an overcharging alternator. Check your voltage, It should be around 12.7 - 14.5.
Clean your battery terminals.