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How to voltage drop test starter motor circuit Starter Voltage Drop
Test the electrical circuit's . View a wiring diagram of the starter circuit's to see what all is in volved . Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year ,make , model . Under system click on engine , then under subsystem click on starting . Click the search button then the blue link . Check control side at the starter relay . A part not shown on the diagram is the park neutral safety switch , try moving the gear selector to neutral . If it starts then the switch is bad . View video on how relay's work . VEHICLE RELAYS Operation Diagnosis
Could be park neutral safety switch , move gear selector to neutral too see if it starts then .If not that , you need to view wiring diagrams an test the starter electrical circuit's . Also should read how that circuit works , what's all involved . Does the security light come on when it won't start ? Starter enable relay , pass - key decoder module . alot involved here . Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. Year , make , model an engine size . Under system click on engine then under subsystem click on charging system . Starter circuit is located there also . Do you have knowledge of anti- theft system on GM vehicles of that year ? How to videos on youtube for testing starter circuits .
Connection's good ? Main battery cable to the starter ? Starter relay ? Viewing a wiring diagram to see what all is involved in making the starter work ,then testing the electrical circuits is how to find the problem , Using a voltmeter . Plus the ( PATS ) anti-theft system will keep the starter from working , security light flashing when trying to start the vehicle ? Starter Voltage Drop
Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on engine , then under subsystem click on starting . Click the search button ,then the blue link . Do you have a automatic transmission or manual ? Could be the park neutral safety switch if has auto trans . Put gear selector in neutral an see if it starts then . How to voltage drop test starter motor circuit
Do you know what the starter relay is ? Starter Relay
The starter relay:
is a mini ISO relay that switches power to the starter solenoid to engage the starter motor.
receives a START signal from the ignition switch.
is controlled by the powertrain control module (PCM).
Starter System - Operation
When the ignition switch is turned to the START position, the starter relay switches power to the starter solenoid causing the starter motor to engage as long as:
the digital transmission range (TR) sensor is in PARK or NEUTRAL.
the anti-theft system is operational.
Do you know what an automotive wiring diagram is ? How to use a test light or DVOM - digital volt ohm meter .
free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size . Under system click on engine , then under subsystem click on starting . Click the search button then the blue link. Looking at the diagram i see the PCM - engine computer has too energize the starter relay for the starter to engage an spin the engine . Any light's lit on the instrument cluster , security , check engine light etc..... Automatic or CVT transmission ?
Do you know how to use a DVOM - digital volt ohm meter ? How to voltage drop test starter motor circuit testing the electrical circuit's is how to find the problem . Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. Year , make , model an engine size. Under system click on engine ,then under subsystem click on charging . Click the search button then the thrid blue link ,this is the starter electrical diagram . Starter Voltage Drop
Viewing wiring diagrams for the starter circuit an testing the electrical circuits with a DVOM - digital volt ohm meter is the preferred way to find these problems . How to voltage drop test starter motor circuit
Manual or automatic transmission ? 4.0 or 5.0l engine ?
Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size . Under system click on engine , then under subsystem click on starting . Click the search button then the blue links one at a time . . Starter Voltage Drop
Security light lit on the instrument cluster ? Do you know what a wiring diagram is ? Looking at a diagram to see what is all in the starting circuit an using to test the electrical circuit's is the correct way to find the problem . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click engine then under subsystem click starting . Click the search button then the blue link . Look on yourtube . How to voltage drop test starter motor circuit
How to voltage drop test starter motor circuit
Looking at a wiring diagram to see what all is involved in starting your vehicle . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. Year , make , model and engine size. Then under system click on engine . Under subsystem click starting . Then click the blue link . You will see the ignition switch , transmission range switch ,starter solenoid . Testing the electrical circuit with a volt meter till you find the problem . Check the heavy red cable from the battery positive to the solenoid . Starter Voltage Drop
View wiring diagrams an test the starter electrical circuits . Do you own a DVOM - digital volt ohm meter ? Free wiring diagrams here http://www.bbbind.com/free-tsb Do you know what a wiring diagram is an how to read one ? Enter vehicle info. year , make , model an engine . Under system click on engine then under subsystem click on starting . Click the search button then the blue link.
Learning the correct way to test will avoid hitting those walls .
Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on engine ,then under subsystem click on charging . two diagrams , one is the starter electrical circuit . Click search button then the second blue link. Is the security light lit on the instrument cluster ? This will keep it from starting .
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