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Which fuse do you replace when the turn signals and brake lights are not working in a Ford E150 van?

There isn't one single fuse that controls *both* turn signals and brake lights in a Ford E150. They are on separate circuits, and therefore likely on separate fuses. You'll need to consult your owner's manual to find the correct fuse(s). The manual will have a fuse diagram showing which fuse controls what circuit.

To find the problem:

1. Consult your owner's manual: This is the most crucial step. The manual will clearly identify the fuses for the turn signals and brake lights.

2. Check both fuse boxes: Ford E150s often have multiple fuse boxes – one under the hood and another inside the vehicle, usually under the dashboard. Check both.

3. Look for blown fuses: A blown fuse will usually have a broken filament visible inside the clear plastic or ceramic casing.

If replacing the fuses doesn't solve the problem, the issue is likely beyond a simple blown fuse and could be a faulty switch, wiring problem, or a problem with the bulbs themselves. You should then seek professional assistance from a mechanic.