Electric and Electronic Systems
WARNING
Always wear eye protection when working around batteries to prevent the risk of injury
due to contact with sulfuric acid or an explosion.
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Never disconnect any charging unit circuit or battery circuit cable from the battery when the
charging unit is operating. A spark can cause the flammable vapor mixture of hydrogen and
oxygen to explode.
To prevent potential sparks from igniting combustible gases produced by some batteries,
attach the negative (-) terminal last when hooking up and remove the negative terminal first
after the engine has started. Check regularly around the engine and engine compartment
for loose or frayed wires. Have all loose or frayed electrical wires tightened, repaired or
replaced before operating the vehicle.
Grounding Practices
Proper grounding for vehicle and engine electrical and electronic systems is necessary for
proper vehicle and engine performance and reliability. Improper grounding will result in
uncontrolled and unreliable electrical paths.
Uncontrolled engine electrical circuit paths can result in damage to main bearings, crankshaft
journals surfaces and aluminum components. Uncontrolled electrical circuit paths can also
cause electrical noise which may degrade vehicle and radio performance.
Operating engines without the engine-to-frame ground strap installed can cause damage
to the engine. To prevent electrical discharge damage, check to make sure the engines
electrical system has an engine-to-frame ground strap. All ground connections should be
tight and free of corrosion.
