ROTOR CURRENT TESTMethod used to check
alternator windings for an internal short.
ROTOR WINDING OPENAn open (broken)
winding in an alternator rotor.
ROTOR WINDING SHORTA short-to-ground
fault in an alternator rotor.
RZEPPA CV-JOINTBall-and-cage type constant
velocity joint used on front-wheel drive vehicles.
SAFETY RIMWheel designed with small ridges
that holds a tire in place if a blowout or flat occurs.
SECONDARY CIRCUITIn an ignition circuit, all
components are operating on coil (high) voltage.
SECONDARY WIREWire used in a vehicle
ignition system. It carries high voltage from the
coil to the spark plugs.
SECONDARY WIRE RESISTANCEA
performed to check condition of a spark plug or
SECTOR SHAFTOutput gear in a recirculating
SEMICONDUCTOR Substance that acts as an
insulator or conductor, depending upon
SENSORDevice that monitors and reports a
condition to the vehicle computer.
SENSOR ROTORA toothed wheel that operates at
the same rpm as the vehicle wheel.
between the plates of a battery.
SERVOPiston that operates a band in an automatic
SERVO ACTIONSituation in which the primary
shoe of a drum brake system helps apply the
SHAFT RUNOUTWear or damage (bending),
causing a shaft not to run true around its axis.
SHIFT FORKDevice that physically moves the
synchronizer and gear together as a result of shift
SHIFT LEVERThe handle operated by the vehicle
operator to shift from gear to gear manually.
SHIFT LINKAGE ADJUSTMENTMaking sure
the transmission linkage positions match the gear
SHIFT RAILA manual transmission linkage that is
contained within the transmission case.
SHOCK ABSORBERDevice that uses air or
hydraulic pressure to dampen up-and-down
motion of a vehicle.
SHORT CIRCUITExcess current flow that occurs
when a conductor touches ground.
SHORTED CONDENSEROne with a direct
electrical connection to ground.
SIDEWALLPortion of a tire between the tread and
SIMPLE CIRCUITOne consisting of a power
source, a load, and conductors.
SLOW CHARGEROne that feeds a small current
into the battery over a long period of time.
SOLENOID ACTUATOROne with a moving
metal core that is actuated by an induced magnetic
SPARK PLUGDevices that emit an electrical arc at
the tip to ignite the air-fuel mixture in an engine
SPARK TESTCheck of the spark intensity
(brightness and length of arc).
SPECIFIC GRAVITYWeight or density of a
SPIDER GEARSIdler and axle gears in the
differential that drive the rear axles of a vehicle.
SPINDLEStationary shaft used to support rotating
wheel assembly on nondriving wheels.
SPONGY BRAKESBraking system that is "soft"
feeling, usually as a result of air trapped in the
SPRING RATEThe stiffness or tension; amount of
weight required to compress or bend a spring.
STARTER CURRENT DRAW TESTStarting
test that establishes the number of amps used by
the starting system.
STARTER GROUND CIRCUIT RESISTANCE
TESTCheck of all parts between the battery
negative and the starting motor.
STARTER MOUNTED SOLENOIDOne with a
plunger that moves to engage the pinion gear with
the flywheel gear.