Ground Test
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Suzuki XL-7, 2004 Suzuki Vitara, 2004 Suzuki Grand Vitara, 2003 Suzuki XL-7, and 2003 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Check the commutator and armature core. See Fig 1 . If there is continuity, the armature is grounded and must be replaced.