How to reset service soon light 2000 ford 450

Question edited for clarity.
Question moved to sub category.

Check fuses 1 and 13. Look at the rear for wires where the insulation has been worn through.

Ford F-250 (1999 - 2001) - fuse box diagram - Auto Genius

https://www.autogenius.info > ford-f-250-1999-2001-f...
May 17, 2018 - Ford F-250 (1999 - 2001) - fuse box diagram. Year of production: 1999, 2000, 2001. Passenger Compartment Fuse Box. The fuse panel is located ...

Ford F-250 / F-350 / F-450 / F-550 (2000-2003) fuses and ...

https://fuse-box.info > ford > ford-f-250-f-350-f-450-f-...
Fuse box diagram (location and assignment of electrical fuses and relays) for Ford F-series Super Duty (F250 / F350 / F450 / F550) (2000, 2001, 2002, 2003).

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Disconnect the negative battery cable for 30 minutes. Reconnect after and the code will clear. However if the problem persists, the code will come back with in 20 miles or 30 minutes.

Was the oil changed?

need servicing soon

Time for factory service, that happens on those between 80000, and 100000 miles. Ford lets you know. They reset it once service is complete.

most likley the people who serviced it never reset the service clock up,, so the car dont know its just had a service,, and still "thinks "it needs one soon, just get the service clock reset

To reset the light you need a scan tool to clear the codes and this will reset the light.
If you goto any major parts store chain, they can do this for you for free.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

dis-connect the battery terminals for 2 minutes and put it back on...

You need to take this to a shop and have the airbag system repaired as that light is indicating a fault in the airbag deployment system. The service Engine soon light could be nothing more that a reminder to change the oil but is most likely an Oxygen sensor that needs replaced.

The service engine soon light indicates you have a problem with the engine management system.The only way to get it to stay off is to lacate and repair whatever is not working correctly. Requires very specialized equipment. Take it to your mechanic.