MTD 700 Series Professional Shop Manual page 123

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A.C.2
Test #
1
2
3
4
5
6
7
8
9
10
11
12
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A.C.1 B+
Figure 7.37
Pos. Probe COM. Probe
Housing B+
Housing A.C. 1
Housing A.C.2
B+ A.C.1
B+ A.C.2
B+ Housing
A.C.1 B+
A.C.1 A.C.2
A.C.1 Housing
A.C.2 B+
A.C.2 A.C.1
A.C.2 Housing
7b. Bench Test: See Figure 7.37.
• Set a digital multi-meter to read on the X100Ω
scale.
• With the key OFF and the fuse removed, unplug all
the wires from the regulator/rectifier.
• Remove the regulator/rectifier from the engine (not
strictly necessary, but provides easy access).
• Make the resistance tests described in the accom-
panying table.
B+ is the D.C. terminal
A.C.1 is the A.C. terminal nearest B+
A.C.2 is the A.C. terminal furthest from B+
8. If the regulator/rectifier fails any one of these tests,
replace it with a new one.
Results
O.L. (infinite resistance)
O.L. (infinite resistance)
> 1.0 Ω (5 second delay)
0 Ω (Perfect continuity)
> 1.0 Ω
> 1.0 Ω
0 Ω (Perfect continuity)
> 1.0 Ω
> 1.0 Ω
O.L. (infinite resistance)
O.L. (infinite resistance)
> 1.0 Ω
Electrical
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