Briggs & Stratton VANGUARD M490000 Repair Manual page 10

3
1
Back Probe Connector Terminals
NOTE: Do not insert probes into terminals on the mating
side of any connector. The diameter of the test probes
can damage terminals.
1. Obtain Briggs & Stratton Back Probe Wire Set (Part
No. 19625).
2. Carefully slide metal pin on probe between the rubber
seal and wire insulation on the back side (wire end) of
the connector.
3. Gently push the pin in until it stops. Stop pushing
when the pin "bottoms out," or when the plastic
sheath is very close to the connector housing.
DO NOT force the pin into the connector as terminal
and/or probe pin damage can occur. Probe travel
may be stopped by contact with insulation or core
crimps. Try again after removing and re-positioning
probe pin.
IMPORTANT:
• Use care to avoid deforming connector terminals,
either by forcing the probe too far into the cavity
or by using a probe that is too large. If terminal
damage is suspected, test for proper terminal
contact.
• A deformed terminal can cause a poor
connection resulting in intermittent problems or
even complete component failure. Do not use
paper clips or other substitute devices as they
also can damage terminals.
• Do not probe through connector seals, wire
insulation, secondary ignition wires, boots, etc.
Damage can occur that is not readily apparent
and tiny holes can result in water intrusion, which
6
leads to corrosion and eventual component
failure.
Avoid ECM Damage
CAUTION
A surge in voltage, current or both, is called a
voltage spike. Voltage spikes can cause major
damage to the ECM.
1. To avoid ECM failure due to accidentally induced
voltage spikes, always observe the following
precautions:
• Do not start engine if battery cable connections
are loose.
• Do not use a battery charger to start engine.
• Turn Ignition OFF before disconnecting and/or
connecting battery cables.
• When disconnecting battery, always disconnect
battery negative (-) cable first.
• When connecting battery, always connect battery
positive (+) cable first.
• When charging battery, turn Ignition OFF and
remove battery negative cable (black) from
battery negative (-) terminal.
4