* Under the hood: This is the most common location for the main fuse box. It's usually located near the battery, often on the driver's side fender well. Look carefully in that area.
* Inside the cab: A smaller fuse panel or fuse block is often located inside the cab, typically under the dash on the driver's side. This one usually contains fuses for interior accessories.
To be absolutely certain:
1. Consult your owner's manual: This is the best resource. The manual should have diagrams showing the locations of both fuse boxes and what each fuse controls.
2. Check online resources: Search online for "1989 Dodge Ram fuse box location" along with your specific body style (e.g., "1989 Dodge Ram 150 regular cab fuse box location"). You may find pictures or forum posts that can help.
Without knowing the exact trim level and drivetrain of your 1989 Dodge Ram, pinpointing the precise location is impossible. Use the above methods to find the definitive answer for your specific truck.