GENERAL INFORMATION CU800 Service Manual
50
To isolate the problem. Connect the jumper between the battery and the lamp. If it comes on. The
problem is between these two points. Next. Connect the jumper between the battery and the fuse side
of the switch. If the lamp comes on. The switch is good. By successively moving the jumper from one
point to another. The problem can be isolated to a particular place in the circuit
Pay attention to the following when using a jumper wire:
1. Make sure the jumper wore gauge (thickness) is the same as that used in the circuit being
tested. Smaller gauge wire will rapidly overheat and could melt
2. Install insulated boots over alligator clips. This prevents accidental grounding. Sparks or
possible shock when working in cramped quarters
3. Jumper wires are temporary test measures only. Do not leave a jumper wire installed as a
permanent solution. This creates a severe fire hazard that could easily lead to complete loss
off the motorcycle
4. When using a jumper wire always install an inline fuse/fuse holder (available at most auto
supply stores or electronic supply stores) to the jumper wire. Never use a jumper wire across
any load (a component that is connected and turned on). This would result in a direct short and
will blow the fuse(s)
1.19.10 Test Procedures
1.19.10.1 Voltage Test
Unless otherwise specified. Make all voltage tests with the electrical connectors still connected.
Insert the test leads into the backside of the connector and make sure the test lead touches the
electrical wire or metal terminal within the connector housing. If the test lead only touches the wire
insulation. There will be a false treading.
Always check both sides of the connector as one side may be loose or corroded. Thus preventing
electrical flow through the connector. This type of test can be performed with a test or a voltmeter. A
voltmeter gives the best results
NOTE
If using a test light. It does not make any difference which test lead is attached to ground
1. Attach the voltmeter negative test leads to a good ground (bare metal). Make sure the part
used for ground is not insulated with a rubber gasket or rubber grommet.
2. Attach the voltmeter positive test leads to the point to be tested.
3. Turn the ignition switch on. If using a test light. The test light will come on if voltage is present.
If using a voltmeter. Note the voltage reading. The reading should be within I volt of battery
voltage. If the voltage is less. There is a problem in the circuit.
1.19.10.2 Voltage Drop Test
The wires. Cables. Connectors and switches in an electrical circuit are designed to carry current
with low resistance. This endures that current can flow through the circuit with a minimum loss of
voltage. Voltage drop indicates where there is resistance in a circuit. A greater than normal amount
of resistance in a circuit decreases the flow of current and cause the voltage to drop between the
source and destination in the circuit.
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