To find the correct fuse, you need to:
1. Consult your owner's manual: This is the most reliable source. The manual will have a diagram showing the fuse box location(es) and a legend indicating which fuse controls what.
2. Locate the fuse box(es): Isuzus often have more than one fuse box, one under the hood and possibly one inside the cabin (usually under the dashboard).
3. Check the fuse rating: Once you find the blower motor fuse (it's often labeled clearly), check its amperage rating. Replace it with a fuse of the *same* amperage. Using a higher amperage fuse is a fire hazard.
4. If you can't find it in the fuse box: The blower motor may have a relay involved, or the problem might be elsewhere in the blower motor circuit (wiring, switch, motor itself).
In short: You MUST consult your owner's manual. Providing the year, make, and model of your Isuzu will allow for more specific assistance, but the manual is your best bet.
