Possible Causes:
* Fuses: A blown fuse in the turn signal circuit could prevent the turn signals from working, while the emergency flashers use a separate fuse.
* Turn Signal Switch: The turn signal switch itself could be faulty, preventing the turn signals from activating but not affecting the emergency flashers, which have a separate circuit.
* Wiring Issues: There could be a broken wire or loose connection in the turn signal wiring, preventing signals from reaching the lights. This could be anywhere from the switch to the bulbs themselves.
* Turn Signal Relay: The relay that controls the turn signals could be faulty.
* Bulbs: The turn signal bulbs themselves may be blown.
* Grounding Problem: A poor ground connection in the turn signal circuit can prevent them from working properly.
Troubleshooting Tips:
1. Check the fuses: Refer to your vehicle's owner's manual to locate the fuse box and check the fuses related to the turn signals and emergency flashers. Replace any blown fuses.
2. Inspect the turn signal switch: Try wiggling the turn signal lever and see if the signals temporarily work. If they do, the switch might be faulty.
3. Inspect the wiring: Visually inspect the wiring for any obvious breaks or loose connections.
4. Test the bulbs: Check to see if the turn signal bulbs are working. If not, replace them.
5. Use a multimeter: A multimeter can help you test the voltage at the turn signal switch, relay, and bulbs.
Important: If you're not comfortable working with electrical systems, it's best to take your van to a qualified mechanic for diagnosis and repair.
Remember, these are just potential issues. A professional mechanic can provide a more accurate diagnosis and solution.
