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Old 10-14-2024, 09:05 PM #1
Finelygotone Finelygotone is offline
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2011 4runner HVAC Blower Relay Problems

Hi All - TIA for your help. Just bought this rig (188K miles) a couple of months ago and it just developed a couple of problems. One - the in cabin blower (manual system) will turn on/turn off by itself/ turn on again... It is even turning on when the truck is not running - KOIO. I suspect it is the blower relay sticking/malfunctioning so I am changing out the blower (cheap insurance) and need to change out the blower relay but cannot find it? Can anybody point me in the right direction? Also at the same time the alternator has failed. I checked the Alt fuse and it looks good - battery terminal voltage at 12.3 and declining when running (fully charged battery) - could this just be a coincidence? Thanks again!!
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Old 10-21-2024, 07:41 PM #2
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My heat is not really hot. Flushed core same results.
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Old 10-22-2024, 11:02 AM #3
Finelygotone Finelygotone is offline
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Looks like I was able to get this fixed. Seems like the primary issue was a non OEM blower assembly someone installed. I replaced this with am OEM blower and alternator - problem appears to be solved...
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Old 10-22-2024, 06:27 PM #4
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I think the blower relay may be part of the blower motor assy - not sure. Also, you can have the alternator checked by doing a load test. Most auto parts stores can do this. You might have to remove it and take it in. Repair shops have the equipment to do this on the vehicle with it running. Since you just bought this thing - I'd do a complete check or have a shop do it. I'd want everything checked and fluids replaced, fittings checked and greased, everything! Might cost a bit, but worth it IMHO for a vehicle with that many miles and unknown history.
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