Battery light stays on dim

If the dashboard mileage light on your 2001 Buick Regal LS is very dim and the Service Vehicle Soon (SVS) light and antilock light stay on, there could be a few potential causes for this issue. Here are some things you can check:

1. Dim dashboard light: If the dashboard mileage light is very dim, it could be due to a burnt-out bulb or a problem with the dimmer switch. Try turning up the brightness using the dimmer switch, and if that doesn't work, check the bulb and replace it if necessary.
2. SVS light and antilock light: The SVS light and antilock light staying on could indicate a problem with the car's computer system or with the antilock brake system. It could be caused by a faulty sensor, a wiring issue, or a problem with the computer itself. It's recommended to have the car's computer system scanned for error codes to determine the root cause of the issue.
3. Battery or charging system: A weak battery or faulty alternator can cause electrical issues in the car, which could be related to the dim dashboard light and the warning lights staying on. Have the battery and charging system checked to rule out this possibility.

there is a dimmer switch to dim the dash lights. when you turn it all the way over it turns the interior lights on it is the same switch as your headlights.

you have loose wires with in your dash you will have to take apart your dash an fined witch ones leads to wats going dim an tightin the wired=s

Possibly your lights are on timer, or an auto dim, or auto lamp function.

Its possible the security system has been set off. The security light on the dash will stay on if this is the case. The cause can be the key tumbler if it is the security.

How much have you driven vehicle? You need to drive long enough for computer to reset refrence points onboard. If that does not work, you have a bad voltage limiter on your instrument cluster board!

The alternator has stopped charging for some reason.
First check alternator drive belt is ok;
Check dash 'battery' (or 'ALT') light illuminates when ignition on and motor not running- if not, check 'ALT' lamp is not blown and connections to alternator are ok;
If all above ok, the alternator may be faulty.

recheck battery cables make sure there clean and tight. sounds like its not geting good conection, or starter is bad.

Is the battery light on when key out of switch?

Have your charging system checked. I had a similar problem with a chrysler van - the lights would brighten and then dim periodically. it turned out to be the battery.