2007 Saturn Vue 3.5L Cool 2 fuse keeps blowing. Car is not overheating and is in good running condition. I am getting a P0693 code. I’ve replaced both cooling fan motor relays. Any ideas?
There is a short in the wire to the cooling fan or the motor is failing or there is a high resistance ground and drawing more current blowing the fuse.
You didn’t tell us if this was a 4 or 6 cylinder… looks like a 6 has 2 fans and the 4 has a single, 2 speed fan.
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How long does it take to blow the fuse?? once a month, as soon as you put a new fuse in it??
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There may be a problem with the engine cooling fan controller.
Tester
The fuse doesn’t blow right away. Usually after a month or so.
Measure the current when the fan turns on. Jump the high current tabs with an ammeter and compare that against the fuse size. Set you DMM to min/max, tuck it underhood and drive it over bumpy roads. If the current spikes and blows the fuse, you have a short someplace.
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Cool 2 circuit is for high-speed fan operation, this may be the reason it takes a while for the short to occur. One of your fan motors is shorted, are both of the fans operating while on low speed?
Besides the current rating, there are special types of fuses needed for certain functions, for example a circuit that has a very brief high current draw when first turned on, but then settles down to a lower current. Perhaps you are using the wrong type of replacement fuse; one idea, suggest to purchase the next new fuse at a dealership. They’ll type your car’s VIN into their parts computer system which will tell them the correct manufacturer’s part number for that fuse.
Another idea, ask your shop to measure the fan motor’s current draw. That will tell you if the fan motor is failing.
Yet another idea, a low battery/alternator voltage can result in higher than designed-for current in circuits containing gadgets like DC motors.