Here's the history; last summer the car was overheating and discovered that the high speed wasn't coming on. Local supply didn't have the correct fan so I had to go to JY for sourcing a replacement. Verified the high speed was working and all was good for 6 months, until last week. I figured that it was just the inevitable sequence of an old JY part.
Got the new fan motor from NAPA, tested by applying 12 volts to middle tab then outside tab with proper response to low and high speed. Four days later and I'm back to one speed when applying voltage directly to fan harness on both tabs.
That's three motors with high speed burnt out in 6 months. So how is it that I'm burning out the high speed with no visible signs of wires or harness getting hot on any of them?
Alternate question, has anyone noticed different pitch on fan blades?? What's the reason for this??
Picked up a new fan and out of the box I only have one speed, am I testing incorrectly? Black wire to ground and middle lead to plus side, motor runs at what I assume is low speed. Add outside wire to plus side and speed does not change, so is this fan bad??
Sure as I can be. Fan came from NAPA as a direct replacement for the Ford number. Don't make sense two motors in a row that fail virtually just out of he box.
There may be a CCRM issue but he couldn't get a high fan by applying power to the fan motor at the connector. I'm wondering if the 3.8L is a two speed fan and if it isn't did they give you the wrong replacement part?
I disassembled the old fan motor and I find that both low and high speed tabs are directly connected once it goes past the connector plug. So how does the motor go from low to high, is it seeing additional voltage somehow?
Here's a pic of the windings, everything looks good unless you guys see something I'm not.
Second owner, I've had the car since '96. I have verified through my own witnessing of the high speed kicking in while the car was running and testing prior to installing the replacement fans.
Yes, the first new motor I tested and got both speeds prior to installing into the car, that motor lasted the week. The replacement for that motor failed the bench test out of the box. I'm currently trying run KOEO test with this motor installed to read voltage across both each hot lead.
Engine running at 180* first speed kicks in with 13.9 volts on red wire
Engine running at 190* with 13.9 volts to orange wire but no response from fan motor, stays at same speed. This would be easily noticeable if it had turned on since the motor is simply sitting on the top of the grill and the increased torque would have shifted the motor.
Done everything I can think of to see if it's something with the car, but it does appear this second motor is indeed not good.
The pic with the leads is of the two speed motor that's been in the car since last summer, which was an exact replacement of the original.
Picked up a different motor from an independent parts store, the info page from inside the box says it's a direct replacement of a two speed fan that has been converted to single speed. The number of windings in the motor were noticeably fewer than my original motor so I chose to continue my search...
I don't know what you think you need to clear up..
I never said the CCRM lowered the voltage.
I have installed two replacement fans within the last 6 months, first was from salvage yard and second two weeks ago was from NAPA. Prior to installing fans I did run the bench test with a battery and with the application of 12V to the second leg the speed increased, and I provided this evidence to the service guys at NAPA this morning on the alternate motor (has a roll pin in the shaft to lock the fan into position).
I appreciate the knowledge you share while helping others here, but your insistence that this motor is single speed is simply incorrect. I can't bench test the motor that is pictured because I took it apart after it failed, but I guarantee I did before installing.
Yes, this car had the recall and they installed the breaker, I was unaware of the fan change but that would explain the different pitch on the fan the I got from the salvage yard.
the first pic, when it was working, clearly shows both power pins tied together.
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