Starter Motor; Testing The Wiring Harness, Switches Etc; Switches, Plugs, Ignition Switches, Cables - Rothewald 10002567 Mode D'emploi

6.3.2 | Starter motor

Disconnect battery, remove starter from the motorcycle and
dismantle it. Check the contact pressure of the brush springs and
the length of the carbon brushes and replace them if necessary.
Clean the commutator with a suitable solvent (degreaser) and, if
necessary, rub it down with fine sandpaper. Check the depth of
the commutator grooves (approx. 0.5 – 1 mm), recut them with a
sawblade if necessary or replace the rotor. Insert the red test lead
in the VΩmAhFE jack, and the black test lead in the COM jack on
the multimeter. Select the 200 ohm measuring range and perform
continuity test (see above). Measure the resistance between two
commutator bars of the rotor in all possible combinations. There
should always be a low resistance. A value close to zero indicates
a short circuit, while too high a resistance indicates a line break
requiring the rotor to be replaced. Now select the measuring
range up to 2 MOhms on the multimeter. Hold the red test probe
against each commutator bar in turn and the black probe against
the axle (earth). Unless the resistance measured in each case is
infinite, there is a short to earth and the rotor should be replaced.
If the starter motor stator has field windings instead of permanent
magnets, they should likewise be tested for shorts to earth (if the
resistance between earth and field winding is not infinite, replace
the winding) and for continuity (the resistance in the winding
should be low, see above).
6.4 | Testing the wiring harness, switches, etc.

6.4.1 | Switches, plugs, ignition switches, cables

With the passage of time, corrosion and dirt can build up high
contact resistance in plugs and switches. Cables that are affected
by copper corrosion make poor conductors. In extreme cases,
this can result in a component becoming completely disabled,
whilst less serious damage can cause a more or less noticeable
reduction in the efficiency of electrical devices such as lights or
ignition. A simple visual inspection of components is often all
that is required: green connector tongues and corroded switch
contacts must be scraped or sanded clean and reassembled
with a little contact spray. Cables with greenish cores should
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be replaced. A cable cross-section of 1.5 mm is generally
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