* Under the hood in the fuse box: This is the most common location. The fuse box is usually located near the battery. The relay itself might be a separate unit or part of a larger assembly within the fuse box.
* Under the dash: Less common, but possible. Look for a fuse box or relay panel under the dashboard, often near the steering column.
* In the HVAC blower motor housing itself: In some rare instances, the relay might be integrated directly into the blower motor housing. This requires removing the blower motor to check.
To find it, you'll need to:
1. Consult your owner's manual: This is the best resource. It should have a diagram showing the location of all fuses and relays.
2. Check the fuse box diagrams: Often, the inside cover of the under-hood fuse box has a diagram showing what each fuse and relay controls. Look for one labeled "blower motor," "heater fan," or similar.
3. Use a multimeter: If you can't find it visually, you can use a multimeter to test continuity on suspected relays to confirm which one controls the blower motor. Be careful when working with electrical systems; disconnect the battery's negative terminal first.
Because there's no single definitive answer without knowing the specific model and options on your S10 Blazer, these steps are necessary to locate it. Good luck!
