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Radiator fan will not turn on

Tiny
ASEMASTER6371
  • MECHANIC
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Okay, he is correct but that is not the reason for no voltage to the fan.

Try this: Disconnect the coolant sensor wires and turn the key on. Hook up the fan connections and see if the fan kicks on.

I attached a picture of the location for you.

Roy
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Monday, June 21st, 2021 AT 1:35 PM
Tiny
WITCH1
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It's fixed! Bad Relays and broken wire.
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Tuesday, June 22nd, 2021 AT 12:04 PM
Tiny
ASEMASTER6371
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Good find.

Glad you are back on the road.

Roy
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Tuesday, June 22nd, 2021 AT 12:25 PM
Tiny
WITCH1
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Thank you for everything!
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Tuesday, June 22nd, 2021 AT 8:08 PM
Tiny
ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
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Wednesday, June 23rd, 2021 AT 2:01 AM
Tiny
WITCH1
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Well my Jeep is not fixed. The mobile mechanic ran a jumper inn the relay so fan would stay on. Which it does. But after approximately three minutes of idling, the temperature rose past 250. I had to shut it off, wait 10+ minutes and ran the heater on high to get home. I'm at a loss. It has got new radiator, hoses, thermostat, temperature sensor, fan assembly, it's not water pump. And made sure there were no bubbles in coolant lines. Any suggestions? I'm going to take out thermostat put it in pot boiling water to see if it opens.
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Wednesday, June 23rd, 2021 AT 12:22 PM
Tiny
ASEMASTER6371
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Okay, I would more suspect a head gasket than a bad new thermostat.

https://www.2carpros.com/articles/head-gasket-blown-test

I would do a compression test to see if there are any air bubbles in the radiator during the test to be sure the gasket is not leaking.

You have covered all the basics with what you did but if it still overheats then the head gasket is the next check.

I attached the procedure for you below for the head gasket.

Roy
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Wednesday, June 23rd, 2021 AT 1:30 PM
Tiny
WITCH1
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No, it's not head gasket tried 3 tests. I did notice the radiator overflow which was at full mark yesterday, is almost empty. I searched for leaks can't find any.
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Wednesday, June 23rd, 2021 AT 7:43 PM
Tiny
ASEMASTER6371
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Did they do a leak-down test on each cylinder?

That is where they inject shop air into each cylinder 1 at a time and watch for any coolant movement in the radiator.

If the coolant comes up or bubbles, it is the head gasket leaking. Each cylinder needs to be tested.

My gut tells me that this is your issue.

Roy
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Wednesday, June 23rd, 2021 AT 9:15 PM

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