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you should check fuses first if its been working good then i would dought if fuse jumped OUT of fuse box , there is a fan relay also , could be bad . swap out relay with a good one see if it works. you can also check temp sensor that tells fans to come on . good luck .
1-4 speed are the blower motor resister . It controls all 1-4 speeds, also it's under the passanger side dash around fan, the 5th speed runs off a fuse the is located in the fuse box. It's one of those square fuses , not the relays but fuses. The resister will run $15 and fuse $5 . Good luck. I have replace these before
the fuse box is located under the dash to the left of the steering wheel. there are two seperate boxs, a large one and a smaller one above that. check all the fuses if you dont know the number, they should be listed on the cover. if it is not the fuse, then it could be the connection for the fan, i problem i have had, which is located under the dash and under the glove compartment. you should see the fan there and the connection to the fan. check for melting or arcing around the connection. worst case scenerio would be that the fan is shot. if that is not the case take it in to a specialist to have it looked at.
Check the fuse box under the dash, which you may have already done, also check under the hood there is a secondary fuse box and it will list the heater and fuse or it may have a relay for the heater, you my have a bad relay for heater.
if the fan does'nt come on at any speed have the fan checked if fan is good check the switch if on good replace fan switch located inside there is also a regulator under dash behind the glove box if the fuse's,motor & switch are all good this regulator the last comp. in the heater circut or you have a broken wire. hope this is helpful
The fuse box for that fuse would be located behind the drivers side kick panel. its a 7.5 amp fuse that allows things like the heater fan, overdrive, seat belts and gauges to function. I had the same problem and checked the fuses visually - not a good idea since it did not blow in the middle. took me a while, but i finally used and ohm meter and found it. Hope this helps out.
Check the following fuses:
10 amp GAUGE under the dash, and the 40 amp HEATER under the hood.
If both fuses are good, I suspect that you may either have a bad fan switch or a bad heater fan motor. The switches are rare to fail, I would suspect the heater motor first. Please try this: Turn the key on; turn the fan switch to high. Look under & behind the glovebox, for the bottom of the heater fan motor. Round thing with 3 screws holding it to the heater box. Using a small hammer, or something that you can tap with, tap on the bottom of the heater fan motor. You just may jar the motor enough to make it run. If it comes back on, you may need to replace it at some point in the near future. Worked for me quite a few times. Try that, repost to me what happens. Hope this helps.