FM-15: THE TOOL RUNS ONLY ONE DIRECTION OR OPPOSITE THE SELECTION

The tool's direction selector moves normally and holds detents, but the chuck runs only in one direction or rotates opposite to the selected direction.

• Selector is not pushed fully to the intended side
• External cap moves but does not actuate the internal switch
• Direction-switch contacts are worn or burned
• Wiring, trigger, brush, or motor connection fails in one polarity path

1. Forward and reverse match the selected arrows, or the electrical direction path is conclusively routed to service.

1. Compare actual chuck rotation with the molded direction arrows and repeat once only if the first selection was incomplete.
2. If one direction is absent or reversed with sound selector detents, remove the battery and route the direction switch or wiring to service.
3. Remove the bit, support the tool, and confirm the selector moves fully to each side with the trigger released.
4. Install a verified battery and make one brief empty-chuck test in forward, then stop completely before selecting reverse.

This is a preview of the troubleshooting guidance included in the full repair manual.

• The direction selector moves and holds normal detents, but the chuck fails to run in one direction or rotates opposite the selected arrow.

  The direction selector moves and holds normal detents, but the 1. Remove the bit, support the tool, and confirm the selector moves fully to each side

• root cause analysis
• tools needed
• step-by-step repair procedure
• diagrams
• exploded views
• post-repair checks

Public pages show a preview only. Purchase the full manual to download complete repair steps, diagrams, and verification procedures.