Mercury 150 EFI Service Manual page 126

CHARGING & STARTING SYSTEM
Checking Positive Brushes and Terminal
Set ohmmeter to (R x 1 scale). Connect meter leads between POSITIVE brushes. Meter
must indicate full continuity or zero resistance. If resistance is indicated, inspect lead to
brush and lead to POSITIVE terminal solder connection. If connection cannot be repaired,
brushes must be replaced.
a -
Testing Negative Brushes for Ground
Set ohmmeter to (R x1 scale). Place one lead of the ohmmeter on the NEGATIVE brush
and the other lead on the end cap (bare metal). If the meter indicates NO continuity, re-
place the NEGATIVE brush. Repeat this procedure on the other NEGATIVE brush.
a -
b -
Page 2B-32
a
Positive (+) Brushes
b
a
Negative (–) Brushes
End Cap
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90-883728 JULY 2001