• Blown fuse indicator instantly identifies blown ATO fuses.
• When a fuse blows the Circuit Alert glows bright red to identify which fuse needs to be replaced.
• Snaps into place on top of any ATO fuse.
• Dual polarity circuit performs regardless of how the Circuit Alert is placed on the fuse.
• Removable and reusable.

Note: The ignition must be in the "on" position when checking for a blown fuse.