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Fuses are deigned to blow to protect other more valued and sensitive equipment. They surrender their life for the sake of your car's wiring or device on the power line they protect. If a fuse blows, be glad for the warning the fuse gives you of a problem in either the device it protects or the wiring harness along the way to the device(s) the harness serves.

To best self-diagnose the problem the blown fuse reports, try this routine. First, turn off all lights and other electrical devices that fuse serves (see your owner's manual or the inside cover of your fuse panel). Secondly, with the ignition off, replace the fuse with one of like size (15 Amp for a 15 Amp, 20 for a 20, etc., NEVER use anything but the correct sized fuse). Next, ensuring that all electrical devices on that fuse line are Off, including the Wipers, turn the ignition key to the accessory position for a count of 20 seconds.

Now turn the key back to Off, and take the new fuse out of its socket and examine it. Did it blow? If so, the problem is a short in the wiring harness between the fuse and the deices on that power line. If it did not blow, put it back into position for the second test.

Again, ensuring all devices served by the fuse in question are turned off first, turn the ignition key to the accessory position. Next turn on a device served on that line and count to 20 seconds. Now once again check the fuse to see if it has blown. In turn, check all devices on the fuse serve list. If there is a problem device the fuse will blow.

In this fashion you may find that your wipers are not At Fault but rather it is some other device on the wiring harness. Self diagnoses tests may save you a bit of money or not as electrical problems can be tricky to resolve. This test will give you a bit of information such that you can advise a Qualified mechanic of the conditions you have discovered. He/She will be impressed with your skills of diagnoses; will be less inclined to take advantage of you and your wallet. Don't make the mistake of telling you mechanic to replace this or that, but instead ask them to run some tests and to call you with an estimate before proceeding with repairs.

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17y ago

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