Cooling fans not working

Good morning,

I attached a wiring diagram for you to view.

We need to do some testing to find out why the fans do not work

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Does the condenser fan work with the A/C on?

Roy

It blows out air inside car it fans don’t turn on when I turn on A/C.

Okay, that fan will come on when the high side pressure hits 150 pounds.

Do you have a tester for doing some voltage checks?

https://www.2carpros.com/articles/how-an-electric-cooling-fan-works

Roy

No, but I’ve changed the switch because I thought it would be that but nothing still. still no fans when temperature gauge is at its heat they still don’t turn on even if I try to turn on A/C. I know they should kick on anyways when turning on A/C but nothing.

Can you go to the radiator fan relay and check for voltage at the relay with the key on?

In the diagram I sent you, there are 2 fuses for the relay.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Roy

I do not know if every little whole on relay that the relay for fan to turn on have to have voltage but the small fuses have voltage.

I attached the location of the relay for you.

Roy

No, I do not know that, but does every little whole that the fuse hose into have to have voltage?

No, with the key on, you should have 2 terminals with voltage.

Roy

Oh, okay. yea there’s power going through there.

How many powers? Please give me as much information as you can.

Roy

11.58 and I’m giving you everything. I’ve been trying to be honest it’s crazy how it don’t turn on would a bad thermostat not make the coolant can’t to turn on? but okay either way when turn on A/C they both suppose to go on?

Okay, is that one terminal or 2?

11.58 means your battery is dead. You should charge your battery. It needs to be 12.6 volts.

Roy

But even though the car turns on?

Yes, the voltage you need to these terminals needs to be above 12 volts for the relay to work.

Again, how many terminals have voltage at the relay?

Roy

Both have 12v I just checked it. but do you think a bad thermostat would effect it if it has a bad one?

Okay, if the thermostat is wide open and the coolant never reaches 208 degrees, yes it could.

One test you could try is to disconnect the connector for the coolant sensor with the key on. The fans should kick on.

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works

https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor

If they do, the all the electric is good and the issue is it is running too cool.

If it does not, then we have an electrical issue.

Try that and let me know.

Roy

They don’t turn on still.

I unplugged the connection and nothing.

Okay, with the sensor unplugged, check for power to the fans. Use your test light or voltmeter and see if there is any power to the plugs.

Roy

Okay.

How are you making out?

Roy

Okay, I got this volt meter I put it on 12 v right to check those plugs and both sticks go in plug or.

Okay, no, the black lead goes to the battery negative post and the red lead is what you test the terminals.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Roy

Okay, it reads -2.

What reads -2? Where are you measuring the voltage?

Can you post a picture of where you are measuring?

Roy

Okay, these are the two connections that go to fan those are the ones right?

Correct. Did you check for voltage to both connectors with the red lead?

Is the key on and the coolant sensor disconnected?

Roy

Yea, they both are -2 and yes the coolant switch connector is unplugged too.

Okay, go back to the relay and remove it and check for voltage to any of the 4 terminals in the connector.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Roy

Okay, so with Caron they test at 14.40 but the one bottom left is 14 and with car off and key for word it reads 12.40, but bottom left 12 and other small fused are 12.40.

Is that good?

So they all have voltage? Is that what you are saying?

Roy

Yea they all have voltage.

It’s crazy, haha.

Okay, I have been looking at the diagram and there is no way there should be power on all 4 wires. If you do, you have a short in the harness somewhere that is providing power where it should not be having power.

You need to inspect your engine harness and be sure it is not damaged or pinched anywhere.

Roy

So what you mean is that there shouldn’t be no power going through or what do you mean?

There should only be 2 powers with the key on. The third wire is a ground done by the ECM and the fourth is the wire to the fan motor.

If you have power on all 4 then there is a short in the harness that is allowing those wires to be powered.

Roy

Well, there’s 3 with power In the wholes of the relay.

Now there is only 3? Why? What did you do?

Roy