My radiator fan is running without keys in the ignition a...

My radiator fan is running without keys in the ignition and drained my battery. I had to disconnect lines from battery so that I could charge battery without it being drained by the fans Mechanic's Assistant: Has the car b...

My radiator fan is running without keys in the ignition and drained my battery. I had to disconnect lines from battery so that I could charge battery without it being drained by the fans Mechanic's Assistant: Has the car been overheating? Have you checked the fuses? I do not know which fuse it is to check. Ive been looking to see where and which it is Mechanic's Assistant: What is the make/model/year of your car? 06 gmc sierra 1500 Mechanic's Assistant: What year is your Sierra 1500? 2006 Mechanic's Assistant: Are you fixing your Sierra 1500 yourself? What have you tried so far? Yes I am and I haven't tried anything yet

Automotive Expert
Hello and welcome! My name is \*\*\*\*\* \*\*\*\*\* I can assist you with your question. I am sorry to hear about this issue and I understand it can be frustrating so I will try my best to help. Can I start by getting your first name? Thank you

Automotive Expert
Thank you Anthony. Have you checked for codes in the computer? Can you send me the VIN?

I havent checked, i dont havr access to one right now
Automotive Expert
Have you tried to remove the cooling fan relays under the hood?

Im not sure which one is for the cooling fans.I pulled all of them and it continued to runIve currently disconnected battery and charging it directly away from my truck
Automotive Expert
You should have three separate cooling fan relays under the hood. I would remove one of them at a time to see if there is an improvement. Just a heads head, cooling fans will run for a bit with the engine turned off while the engine is hot. However, if the problem continues, there is an electrical issue that needs to be addressed.
Automotive Expert
If the fans are running when the temperature is not hot, disconnect the Powertrain Control Module and inspect connectors for corrosion and fix or clean and needed. If the fans stopped running with the PCM disconnected and there is no corrosion, replace the PCM. If they continue to run, inspect the relay center or corrosion or a shorted wire. Also check the wires from the relay center to the PCM for a short to ground or another wire. It has been a pleasure working with you. Keep in mind this is a “starting point”. We can always continue as needed at a later date or at any time. Feel free to run some tests and reply back for further assistance as needed. Glad I can help. Please let me know if you have any further questions. Thanks and have a great day!

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