Field Coil Test

WARNING: This page is about a different car, the 2003 Isuzu Rodeo Sport and 2002 Isuzu Rodeo Sport. However, it is still accessible from the selected car via links, so may be relevant.

Check for continuity between the end of the field coil and yoke body. See Fig 1. Replace the field coil, if there is continuity.
Check continuity between the lead wire of terminal "C" and brush. See Fig 2. Replace yoke assembly if there is no continuity.

Fig 1: Checking Continuity Between Coil & Yoke
Courtesy of ISUZU MOTOR CO.

Fig 2: Checking Continuity Between Terminal "C" & Brush
Courtesy of ISUZU MOTOR CO.