OK, so I’m trying to track down this cooling fan problem. When I turn the a/c on, only the passenger side fan comes on.(People assure me the driver’s fan is supposed to come on to. Can somebody confirm this is true? I have a 96’ Honda accord LX) Here’s what I’ve done so far: Direct power to cooli…

Both fans should come on with the a/c running. The temp sensors are by-passed when the a/c is on, so the circuit problem is somewhere else. Start at the fan relays and check that the circuit to the driver’s side fan is working. Check to see if the a/c circuit is activating the relay. Let us know.

The circuit? Are you talking about the fuses? I checked all those and they are all good. Since there is low voltage on the connector wires to the thermostat I’m probably looking for some corrosion somewhere, right? Popular mechanics said that’s the most likely cause.

ok, I now what know the ohms sign is, I have that on my multimeter-----------Ω – ohm’s symbol Ok, I tested the connector by placing the positive inside the connector going to fan and grounding it. That’s just a voltage check, right? Which connectors do I need to put which side in to test the circu…

Ok, good news I’m not an idiot. My voltage check wasn’t reading right because the main ground off the battery cable to below the engine was corroded as all get out and the wire insulation was exposed and fraying!. I did the laborious task of getting it off, cleaning off the corrosion with a wire bru…

This is why you need to check the circuit. There is a problem between the relay and the fan connector if the voltage drop is that much. Did you try running the 12V power through the relay connector with a jumper wire? You may need to run a new wire from the relay to the fan if you cannot isolate the…

Most likely the problem is with the fan itself. I had this same problem a few years ago with our 97 Accord and it was the fan motor. The passenger side fan is the radiator fan and is supposed to come on both by coolant temp and AC on. The drivers side fan is the condenser fan and come on only wit…

The radiator fan relay is in the underhood relay panel. On the drivers side of the radiator, on the frame near the top are two relays, the relay towards the rear of the car is the compressor relay, the one towards the front is the condenser fan relay. Remove the plug.

Look for a blue/yellow wire and white wire. Short the two pins together and the fan should run, even with the ignition switch in the off position. If it does not, the fan is bad. Be careful, there is a yellow/white wire, do not mix this one up with the white wire.

Car Overheating -- troubleshooting cooling fan

Maintenance/Repairs

BustedKnuckles March 25, 2012, 8:37am 4

Possible corrosion. But, by checking the circuit, I mean check the impedance between the relay and the cooling fan connector. This checks the wiring and the connection ends for possible open circuit issues. If the ohm reading is less than infinity, there is a circuit problem.

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Car Overheating -- troubleshooting cooling fan

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