* Overcooling: The engine might not reach its optimal operating temperature, leading to poor fuel economy, increased emissions, and potential engine damage.
* Battery drain: The fan constantly running will draw significant power from your battery, potentially draining it, especially if the engine isn't running long enough to recharge it.
* Fan motor failure: Continuous operation will put extra stress on the fan motor, shortening its lifespan and potentially causing it to burn out.
However, if you're troubleshooting a malfunctioning cooling system, understanding the relay's role might be helpful. The correct way to diagnose is to determine *why* the fan isn't working. Is it the relay itself, the fan motor, the temperature sensor, or a wiring issue? Bypassing the relay without understanding the root cause is a band-aid solution and might mask a more significant problem.
If you absolutely MUST temporarily bypass the relay for testing purposes (e.g., to confirm the fan works), proceed with extreme caution and ONLY for a short period:
1. Locate the radiator fan relay: Consult your car's repair manual to pinpoint its location in the under-hood fuse box or elsewhere.
2. Identify the relay's terminals: Relays usually have multiple terminals. You'll need to find the terminals that supply power to the fan motor. Again, consult a repair manual for your specific car's relay pinout. Incorrect connections can damage your electrical system.
3. Jump the relay: Using a jumper wire, connect the two terminals that normally carry power to the fan motor when the relay is activated. Ensure the engine is OFF before doing this.
4. Turn the ignition ON: The fan should now run. This confirms the fan motor and its wiring are working. Immediately turn off the ignition once you've verified functionality.
After this temporary test, remove the jumper wire. You should then diagnose the actual problem and replace the faulty component (relay, fan motor, temperature sensor, etc.) rather than leaving the fan permanently on.
It is strongly recommended to consult a repair manual specific to your 1994 Chevy Cavalier or seek help from a qualified mechanic. Incorrect wiring can cause significant damage to your vehicle's electrical system and potentially even cause a fire. This information is for informational purposes only and should not be taken as professional automotive advice.
