power windows columbia basin college automotive technology

POWER WINDOWSPOWER WINDOWS

COLUMBIA BASIN COLLEGECOLUMBIA BASIN COLLEGE

Automotive TechnologyAutomotive Technology

COMPONENTSCOMPONENTS

Master SwitchMaster Switch Individual SwitchIndividual Switch Drive MotorsDrive Motors Rack and Pinion Flexible StripRack and Pinion Flexible Strip Safety SwitchSafety Switch Window RegulatorWindow Regulator

SATURN POWER WINDOWSATURN POWER WINDOW

NORMALLY OPEN SWITCHNORMALLY OPEN SWITCH

Powered separately Powered separately by circuit breakerby circuit breaker

Normally used with Normally used with two field coil motortwo field coil motor

Motor is groundedMotor is grounded Tested with Jumper Tested with Jumper

wires or test lightwires or test light

NORMALLY CLOSED NORMALLY CLOSED SWITCHSWITCH

Commonly used in Commonly used in most carsmost cars

Used with insulated Used with insulated system. system.

Receives separate Receives separate power from ignitionpower from ignition

Use jumper wires to Use jumper wires to test systemtest system

Lab 356 and 357

MASTER CONTROL SWITCHMASTER CONTROL SWITCH

On Driver’s DoorOn Driver’s Door System grounded through Master System grounded through Master

Switch if PM MotorSwitch if PM Motor Safety LockSafety Lock Ignition must be on.Ignition must be on. Must use Continuity Chart to TestMust use Continuity Chart to Test

Page 354C and 356C

WINDOW MOTOR CIRCUITWINDOW MOTOR CIRCUIT

DRIVE MOTORSDRIVE MOTORS

Permanent MagnetPermanent Magnet– most are insulatedmost are insulated

Two Field Winding Two Field Winding MotorMotor– opposite windingsopposite windings– motor is grounded motor is grounded

TAPE DRIVETAPE DRIVE– Cable DriveCable Drive

Page 353C

DIRECT DRIVE MOTOR DIRECT DRIVE MOTOR Page 354C

WINDOW REGULATORWINDOW REGULATORAssist Up SpringAssist Up Spring

Less Amps Less Amps used to used to raise raise windowwindow

Dangerous Dangerous when when servicing!servicing!

WIRING CIRCUITSWIRING CIRCUITSPage 356C

ONE TOUCH SYSTEMONE TOUCH SYSTEM

Most makers use this systemMost makers use this system Electronically controlled by “Power Electronically controlled by “Power

Window Control Module”Window Control Module” Less than .3 sec, window travels all the Less than .3 sec, window travels all the

way downway down More than .3 sec, window only travels More than .3 sec, window only travels

until you let off switchuntil you let off switch

Page 359 Classroom

DIAGNOSE IT RIGHT THE DIAGNOSE IT RIGHT THE FIRST TIMEFIRST TIME

Think about the Think about the circuit you are circuit you are diagnosing.diagnosing.

Get a plan of action Get a plan of action through reasoningthrough reasoning

Use the Schematic Use the Schematic of the Systemof the System

DIAGNOSISDIAGNOSIS

Broken Wire in JambBroken Wire in Jamb Sluggish OperationSluggish Operation Excessive Voltage DropExcessive Voltage Drop Jumper LeadsJumper Leads Binding LinkageBinding Linkage Lubrication is Important!Lubrication is Important!

Check Switch OperationCheck Switch OperationPg 406 Lab

Check for Power at MotorCheck for Power at Motor

Component ReplacementComponent Replacement

Safety First!!Safety First!! CleanlinessCleanliness Make sure diagnosis is correct. Make sure diagnosis is correct. Verify diagnosis before motor replaceVerify diagnosis before motor replace Verify Repair (Is problem taken care Verify Repair (Is problem taken care

of?)of?)

DEMONSTRATIONDEMONSTRATION

SHOP EXERCISESHOP EXERCISE Find a Power Window equipped vehicle.Find a Power Window equipped vehicle. Get a Power Window Schematic for the Get a Power Window Schematic for the

car you are working on.car you are working on. Verify type of system you are working Verify type of system you are working

on. (Identify switch type and terminals)on. (Identify switch type and terminals) Perform Switch test with jumper wires Perform Switch test with jumper wires

as applicable. (See Page 405 & 406 in as applicable. (See Page 405 & 406 in Lab manual for a guide.)Lab manual for a guide.)