A/C fans not working

2002 OLDSMOBILE INTRIGUE
155,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC
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DEEDEE3
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A/C does not blow cold and fans don’t come on. checked all fuses and relays and #2 relay for fan does not work and the plug in for fan has no power.
Aug 20, 2020 at 4:26 PM
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KASEKENNY
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These issues may be related but I suspect they are not. Let's tackle the fans not coming on and then we can start a new post for the A/C not blowing cold if it doesn't correct it as well.

Take a look at this wiring diagram when you say relay 2 doesn't work, where do you have power and where do you not? The PCM grounds relay number 1 and number 2 in order to get relay number 3 to be grounded and turn on the left fan.

So we just need to find out where we have power and where we do not. If the number 2 relay is not working have you swapped it out?
Aug 20, 2020 at 4:42 PM
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DEEDEE3
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okay, so i jumped the fan on left and it works but the fan on right threw sparks when i tried to jump it and i have no power to 2nd relay.
Aug 27, 2020 at 10:28 AM
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KASEKENNY
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So you jumped power directly to the fan and the right one didn't work?

Then when you check power at relay 2 you have no power from the fuse or the PCM? Take a look at the wiring diagram and tell me where you have no power. Which terminal of the relay?

The relay 2 is the high speed relay so both fans are run off of relay 1 on low speed and 2 on high speed. So we just need to start narrowing down which terminal we we don't have power.

I am starting to think we have an issue with the PCM but we need more info to confirm this. Let me know and we can go from there. Thanks
Aug 27, 2020 at 7:11 PM