* Under the hood in the fuse box: This is the most common location. The fuse box is typically located near the battery. Look for a diagram on the inside of the fuse box lid to identify the fuel pump relay. The relay itself may be labeled, or you might need to consult your owner's manual or a repair manual specific to your truck's year, engine, and trim level.
* Inside the cab, under the dash: Less common, but possible on some models. This would be in the fuse panel or relay center under the dash. Again, a diagram on the fuse box cover or a repair manual will be necessary.
To find it definitively:
1. Consult your owner's manual: This is the best place to start. The manual will show the location of the fuse and relay boxes and include a diagram labeling each component.
2. Use a repair manual: A Chilton's or Haynes repair manual for your specific year and model S10 will have detailed diagrams and instructions.
3. Look for online forums: Search online forums specific to 1989 Chevy S10s. Owners have often documented the location of their fuel pump relays. Remember to specify your engine type and trim level in your search.
Without knowing your specific S10's configuration, I cannot pinpoint the exact location. Using the resources above is the most reliable way to find it.
