2. Check the battery cables. Make sure the battery cables are properly connected and in good condition. If the battery cables are damaged, replace them.
3. Check the voltage regulator. The voltage regulator is responsible for controlling the charging voltage from the alternator. If the voltage regulator is faulty, it can cause the battery to overcharge or undercharge.
4. Check the alternator. The alternator is responsible for charging the battery. If the alternator is faulty, it will not be able to charge the battery properly.
5. Check the wiring. Make sure all the wiring to the battery, alternator, and voltage regulator is in good condition. If any of the wiring is damaged, replace it.
If you have checked all of these items and the battery is still not charging, you may need to have the electrical system of your van checked by a qualified mechanic.
