every time turn the key over to start it it blows the iod fuse
Oct 18, 2012 at 8:28 PM
1997 Jeep Cherokee Every Time Turn Key Over Start Blows Iod Fuse
1997 JEEP CHEROKEE
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The IOD fuse is live all the time. Are you sure you're looking at the right one? The stickers under the fuse box covers can be confusing, and some are exactly backward, side to side. You have to read them as if the cover was upside down.
A simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to connect them to a 12 volt light bulb. A brake light bulb works well. When the circuit is live and the short is present, the bulb will be full brightness and hot so be sure it's not laying on the carpet or against a plastic door panel. Now you can unplug electrical connectors and move things around to see what makes the short go away. When it does, the bulb will get dim or go out.
A common cause is the ASD fuse blowing because the wiring for one of the oxygen sensors fell down onto hot exhaust parts.
A simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to connect them to a 12 volt light bulb. A brake light bulb works well. When the circuit is live and the short is present, the bulb will be full brightness and hot so be sure it's not laying on the carpet or against a plastic door panel. Now you can unplug electrical connectors and move things around to see what makes the short go away. When it does, the bulb will get dim or go out.
A common cause is the ASD fuse blowing because the wiring for one of the oxygen sensors fell down onto hot exhaust parts.
Oct 18, 2012 at 10:36 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.