Where is the blower motor relay on a 1994 Chevy S10?
The blower motor relay on a 1994 Chevy S-10 is typically located in the under-dash fuse/relay panel on the driver’s side, behind the kick panel. If you don’t find it there, check the engine compartment fuse/relay box near the firewall, as some trucks place the relay in that box instead.
In all cases, the relay controls the power to the blower motor and is often labeled with a tag such as BLOWER, BLWR, or HVAC. The exact position can vary by cab style and engine, so locating the labeled relay in one of the two common fuse boxes is the quickest path to replacement.
Common locations for the blower motor relay
These two spots are the most frequently cited for the 1994 S-10. Start here to save time when diagnosing a non-working blower.
- Under-dash fuse/relay block on the driver’s side, typically behind the kick panel near the steering column.
- Engine compartment fuse/relay box mounted toward the firewall, often near the brake booster or on the passenger-side inner fender.
Note: Location can vary by trim, engine, or aftermarket modifications, so always look for a relay labeled BLOWER, BLWR, or HVAC in the fuse boxes to confirm.
How to identify and test the relay
Once you’ve located a suspected blower relay, these steps will help you confirm it’s the culprit and replace it if needed.
- Disconnect the negative battery cable to prevent shorts while you work.
- Remove the fuse/relay box cover and locate the relay labeled BLOWER, BLWR, or HVAC.
- Check the relay by swapping it with a similar, known-good relay from the same box (do not swap with unrelated relays). If the blower works with the swapped relay, the old relay is bad.
- Alternatively, test the coil side with a multimeter (should show ~60–80 ohms depending on spec) and verify the contacts close when the relay is energized with 12V on the coil.
- With a helper, energize the blower circuit and measure voltage at the blower motor connector when the switch is on; if power reaches the motor but it doesn’t run, the motor or resistor pack could be faulty.
Replace with an OEM or OEM-equivalent relay rated for automotive use. Reconnect the battery and test the blower at all speeds to ensure proper operation.
Final notes
If you’re not comfortable performing electrical tests, consider having a professional diagnose and replace the relay. Electrical work can cause shorts or blown fuses if done incorrectly.
Summary
The blower motor relay on a 1994 Chevy S-10 is usually in the under-dash fuse/relay block on the driver's side, with the alternative location in the engine bay fuse/relay box near the firewall. Look for a relay labeled BLOWER or BLWR, and test by swapping or measuring continuity and coil resistance. If in doubt, consult the service manual or a qualified mechanic.
