Question about Chevrolet 2500

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04 chevy 2500HD start relay /Circuit braker turns off @ key crank

04 chevy 2500HD with 6.0 LS style motor. When turning the ignition key to the crank motor (start) position, I get a quick click sound then dash lights, interior lights shut down as if a fuse has blown. Then within a few minutes dash lights, radio, and interior lights work again (as if there is a heat related circuit braker). I can try to crank/start the motor and the process starts over again. I could not find a blown fuse for ingition and/or starter. Looked and the main under dash hub fuse in the engine compartment was ok. No blown fuses that I know of. Is there a fusible link and/or circuit braker for the keyed crank/start position? or may this be a problem with my ignition starter relay switch?

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  • Jerry Koski
    Jerry Koski May 11, 2010

    say make sure your grounds are all tight just to eliminate that possability .. like your ground from the battery to the block and from the battery to the body.. Then make sure the hot is tight on the starter too .. thanks Jerry

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2 Answers

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  • Chevrolet Master
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Make sure battery has a full charge and battery connections all good. Any fuses in the diagram, test for voltage, some are hot all the time, some go hot with the key on.
Use a digital multimeter across battery posts, everything off, the generic spec for a full charge is around 12.6 volts. Leave the leads hooked up to battery, have a helper turn key to crank, how far does it drop? In my opinion it shouldn't drop much under 10 volts, I wouldn't argue with 9.6 volts.
04 chevy 2500HD start relay /Circuit braker turns  - 2500 starter 1-h5vtzulw5yduyapxqxcg0ngy-5-0.jpg

Posted on Mar 28, 2017

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  • Chevrolet Master
  • 12,440 Answers

Doing starter circuit testing is the way to find bad connections or bad cables etc...Using a volt meter !

Starter Voltage Drop Plus you need to know what happens when you turn that key an all the parts that are involved in the starting of that vehicle . Starter relay's , transmission range switch , PCM .

How to voltage drop test starter motor circuit

Posted on Mar 28, 2017

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Posted on Jan 02, 2017

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SOURCE: 04 Tahoe blowing fusible link in fuse box for starter

HI...
ON the fuse box cover.
IS there a especification for the funtion of the fuse. or the number of the location of the fuse.
If you can give me, I can try help you. as more I can.

Thank you for use fixya.

Posted on Jul 24, 2008

  • 1118 Answers

SOURCE: 2003 Chevy S10 won't start

Are you sure its the starter? did you try it in neutral? could be park neutral switch, or ignition switch, or if its a standard shift maybe it has a switch on clutch that it has to be depressed to start and its bad. As far as jump starting you cross the maine or big post on starter to small or little post on starter to do that, on a v6 starter it on the right side under exhaust manafold, and i think its on the same side on a 4 cyl.

Posted on Feb 10, 2009

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SOURCE: 96 S-10 no start, turn key all lights work nothing

bench test starter motor

Posted on Oct 13, 2009

roniecon
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SOURCE: 2000 Cavalier won't start, making fast clicking sound w/ ignition

Low voltage will cause the problem you are having,get the battery charged,and then have the alternator checked for the correct out put,13.65 to 14.25 if it is not in this range give or take a couple of volts,replace it,I would have the battery replaced also,so you won`t have the problem again.Have a shop replace the battery,if you do it yourself,the memory could be erased if certain measures are not performed.

Posted on Nov 14, 2009

Testimonial: "appreciate the help, will try it in the morning when I can get a battery"

  • 1114 Answers

SOURCE: 1998 Chevy Malibu : Won't Start

I would check the fuel pump turn key on do not start or turn engine over just until dash lights up and you should hear a grunt sound come from back seat area if you do not hear this grunt your fuel pump is not working.Also if you have a check engine light on you should have your can scaned with a OBD 2 scan tool to retreve and faults the cars computer might be undrer going.

Posted on Dec 24, 2009

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?Had a new starter and new battery put on my 1999 Chevy Tahoe.. we by it starts sometimes and sometime it don't..what could the problem be


I'm assuming just by the fact you had a new battery and new starter that sometimes when you turn the key to the start position , nothing happens . Is your vehicle a automatic transmission ? When it doesn't start have checked for battery voltage at the starter solenoid S terminal ? Is there B+ voltage at pins 30 & 86 for the starter relay ? Pin 86 while cranking the engine or trying to crank the engine over . Pin 30 check with key on . Try moving gear selector to neutral . Videos on youtube for basic automotive electrical testing . How to voltage drop test starter motor circuit Find a wiring diagram at www.bbbind.com
Starting System Circuit Description
Voltage is applied at all times to the ignition switch from the IGN A fuse 6 through CKT 242 (RED). When the ignition switch is turned to the START position, voltage is applied to the CRANK fuse 8 through CKT 5 (YEL). From the CRANK fuse 8, voltage is either applied to the clutch pedal position switch (M/T) or the transmission range switch (A/T) through CKT 806 (PPL). When either the clutch is disengaged (M/T) or the transmission is in park or neutral (A/T), voltage is applied to the coil of the starter relay through CKT 1035 (PPL/WHT). Since the starter relay is permanently grounded at ground G105 through CKT 150 (BLK), the starter relay energizes.
Voltage is applied at all times to the starter relay contacts from IGN A fuse 6 through CKT 242 (RED). When the starter relay energizes, the starter relay contacts close, and voltage is applied to the starter motor solenoid. Since the starter motor solenoid is permanently case grounded, the starter motor solenoid will energize two coils. The pull-in winding coil energizes in order to pull the starter motor solenoid contacts closed. When the contacts close, a plunger on the contacts causes the pull-in winding coil circuit to open. The hold-in winding coil then holds the starter motor solenoid contacts closed. Voltage is then applied to the starter motor from the battery through CKT 1 (BLK) and the closed contacts of the starter motor solenoid. Since the starter motor is also permanently case grounded, the starter motor will run until the ignition switch is moved out of the START position. When this happens, a spring in the starter motor solenoid moves the starter motor solenoid contacts and the plunger back to the rest position.

Jan 07, 2017 | 1999 Chevrolet Tahoe

1 Answer

2001 Cadillac DTS wont start or turn over


Turning ignition switch to start position ! Nothing happens , no click , nothing ?
Circuit Description
Moving the ignition switch to the CRANK position sends a 12 V signal to the PCM Ignition Crank Sense. The PCM verifies that the transmission is in the PARK or NEUTRAL position. The PCM then grounds the control circuit of the START relay. When the START relay is energized it allows voltage to the starter solenoid S terminal.

Starter Solenoid Does Not Click

2
Turn the ignition to the START position.
Does the engine crank?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
3
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the Crank Request Signal parameter in the PCM data list.
Turn the ignition to the START position.
Does the scan tool display Yes?
YES - Go to Step 5
NO - Go to Step 4
4
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the Crank Request Signal parameter in the PCM data list.
Turn the ignition to the START position.
Does the scan tool display Yes?
YES - Go to Step 11
NO - Go to Range Selector Displays Incorrect Range in Automatic Transaxle - 4T80- E
5
Turn OFF the ignition.
Disconnect the Starter relay.
Turn ON the ignition, with the engine OFF.
Connect a test lamp between the battery positive voltage of the Starter relay coil circuit and a good ground.
Does the test lamp illuminate?
YES - Go to Step 6
NO - Go to Step 19

This is troubleshooting info from GM factory service testing and repair manual .A scan tool isn't necessary , you could use a test light if you knew which pins at the PCM . For example , testing Crank Request Signal parameter in the PCM data list. Find this wire circuit at the PCM , with a test light .When turning the key to start position ,does the test light light ? A factory scan tool just cuts down the time of diagnoses . A wiring diagram is a must for diagnosing this . Free wiring diagrams can be found at
http://www.bbbind.com/free_tsb.html There are videos on youtube on basic automotive electrical trouble shooting , Control module diagnostics . That is if you don't know how to already .

Jan 01, 2017 | Cadillac Cars & Trucks

1 Answer

I have a 08 Chevy Malibu that won't start. My dash light come on and so will my headlights. It had a good battery connection and the starter is good. It did have a blown ignition senor so we replaced that...


ignition sensor ? I been fix cars for over thirty years an that's a new one for me . I worked for a Chevy dealer for a number of years ! Plus a Cadillac , Pontiac , GMC etc... Maybe you mean ignition switch ? Or crankshaft position sensor ?
Now then lets see if we can decipher the problem your having , When you turn the key to the start position does anything happen ? I am trying to determine if you have a no crank - no start or a crank no start problem . Now which is yours doing or not doing ! When you turn the key to start the vehicle does the engine do anything?
You need to know how the starting system works , when you turn the key in the ignition , the switch sends a discreet voltage signal to the BCM - body control module , an if there is no anti-theft system problems the BCM sends a message on , well here read this from the service information manual for your vehicle .
Circuit Description
When the ignition switch is turned to the Start position, the body control module (BCM) receives battery voltage on the ignition 1 voltage circuit, and less than 5 volts on the off/run/crank voltage circuit. The BCM supplies voltage to energize the RUN/CRANK Relay 32. The BCM sends a high speed GMLAN serial data message to the engine control module (ECM) that the key is in the start position. The ECM receives the message from the BCM, and also receives a serial data message from the transmission control module (TCM) containing the shift lever position. If the shift lever is in Park or Neutral when ignition switch is turned to Start, the ECM supplies voltage to the START Relay 31. The START relay supplies voltage to the S terminal of the starter solenoid, through the 30 A STRTR Fuse 26, in order to crank the engine. This is a very complex system , an without a factory diagnostic scan tool it would be difficult too fix . I suggest you take this to the dealer or a ASE certified repair shop . You could make the problem worst then it is , You could spend thousands fixing it . Do you know what a GMLAN serial data communication network is ? Or how the Anti - theft system works ? I suggest you take it to someone who does !

Mar 15, 2015 | 2008 Chevrolet Malibu

1 Answer

1999 GMC Sonoma 2.2L will not start.


What is wrong????????? That would be a guess on anyones part here ! Testing the electrical circuits involved would be the proper way to diagnose this no start problem ! Using a volt meter an wiring diagram to check voltage at different point's in the starter circuit . voltage drop testing ! Plus knowing how the starter system works !
Starter Circuit Operation
Voltage is applied at all times to the ignition switch from the IGN A fuse through CKT 42 (RED). When the ignition switch is turned to the START position, voltage is applied to the CRANK fuse through CKT 5 (YEL). From the CRANK fuse , voltage is either applied to the clutch pedal position switch (M/T) or the park/neutral position switch (A/T) through CKT 806 (PPL). When either the clutch is disengaged (M/T) or the transmission is in park or neutral (A/T), voltage is applied to the coil of the starter relay through CKT 1035 (PPL/WHT). Since the starter relay is permanently grounded at ground G102 through CKT 150 (BLK), the starter relay energizes.
Voltage is applied at all times to the starter relay contacts from IGN A fuse through CKT 42 (RED). When the starter relay energizes, the starter relay contacts close, and voltage is applied to the starter motor solenoid. Since the starter motor solenoid is permanently case grounded, the starter motor solenoid will energize two coils. The pull-in winding coil energizes in order to pull the starter motor solenoid contacts closed. When the contacts close, a plunger on the contacts causes the pull-in winding coil circuit to open. The hold-in winding coil then holds the starter motor solenoid contacts closed. Voltage is then applied to the starter motor from the battery through CKT 1 (RED) and the closed contacts of the starter motor solenoid. Since the starter motor is also permanently case grounded, the starter motor will run until the ignition switch is moved out of the START position. When this happens, a spring in the starter motor solenoid moves the starter motor solenoid contacts and the plunger back to the rest position.


Starter Voltage Drop

How to voltage drop test starter motor circuit

Jun 23, 2017 | 1999 GMC Sonoma

1 Answer

2004 chevy tahoe won't turnover or start by being jumped


The ignition start circuit is the path from the ignition key in cranking mode to the solenoid on the starter. The path travels through a starter relay and a neutral safety switch before it reaches the starter.
This must be the circuit not working on your car.Make sure battery and starter connections are tight.Check for power at the starter solenoid terminal with a testlight when someone turns key to crank. If you have power there, they sold you a defective starter. If you have no power there then it could be the relay or the neutral safety switch.

Nov 28, 2011 | 2004 Chevrolet Tahoe

2 Answers

L999 Chevy Cavalier keeps blowing fuses and won't start


you have a SERIOUS electrical problem. - '.
BUT which fuses keep blowing - that is where we need to start.
1. is it the ignition circuit. - - does starter motor turn over when you trun the key.
2. is it the starter relay circuit.
3. is it the starter motor circuit.
4. is it the computer circuit. - - do you have fuel pumping to the engine and cylinders.
5. none of the above. - - do you have spark at the spark plugs.

Apr 14, 2011 | 1999 Chevrolet Cavalier

1 Answer

I have a 2001 chevy 2500hd. when i try to start it, i only have a click (one click per key turn) fron the starter. Will not start. any sugg


TRY GETTING JUMP START IF VECHICLE CRANK ON JUMP START.YOUR BATTERY WEAK NEED CHECKING.CHARGED LOAD TEST IF BAD NEED REPLACING.MAKE SURE BATTERY CABLES CLEAN TIGHT FREE FROM CORROSION.TRY THIS TEST TURN ON HEADLIGHTS TURN ON IGNITION SWITCH.IF HEAD LIGHTS GO DIM.STARTER OR STARTER SOLENOID FAULTY WEAK BATTERY.IF HEADLIGHTS REMAIN BRIGHT YOU HAVE OPEN CIRCUIT IN STARTER SOLENOID OR STARTER AMATUER OR FIELD WINDING.

Jan 18, 2011 | Chevrolet 2500 Cars & Trucks

1 Answer

No turning over i go a crank sensor to replace but can't find where it gos.


Not enough info given. Does the starter turn? Does it engage the flywheel and actually turn the engine over? Does it only click and not turn over? Does it even click when the key is turned to the start position? I'm not sure about Chrysler products but some makes have an externally mounted starter solenoid (a fancy word for high-current relay). Some solenoids are mounted directly onto the starter motor and therefore a LOT harder to get to and much more difficult to replace. Yours also has a starter relay somewhere in an under hood fusebox. Whatever you do, DO NOT take a hammer and strike the starter!! That worked on a stuck bendix in OLD STYLE STARTERS. Newer starters have large magnets just under the casing that can so very easily be SHATTERED and completely destroyed by doing this. Old style starters were not made that way so you could hit them without doing damage to the internals. Typically this is how the whole starter action works: You turn the key to start & this closes the start circuit sending 12 volts either directly to a starter solenoid OR to a starter relay which in turn closes its contacts and sends 12 volts down to the starter solenoid which in turn engauges the bendix to thrust a pinion gear outward so it meshes with the flywheel teeth (a big metal plate bolted between the engine and transmission, makes the starter motor begin spinning to turn the engine over. This phase is known as "cranking". Starting is the next phase which occurs if the engine has compression, fuel & air (in the proper proportion), and spark. For example a engine having a bad ignition system may and most likely will crank over but will not be able to start. The part you got is for the ignition/fuel injection system, not the starting system.

Jan 02, 2011 | 1997 Chrysler Sebring

2 Answers

I have a 2003 chevy silverado 2500 with the 8.1 liter.. I will no longer crank when the key is turned. I can only get it to crank and start by jumping the starter relay... I swaped the realy, but that did...


Your security system should only affect the fuel shutoff so I am woundering if you have a ignition switch problem.With key in the start position are you getting voltage to the relay to close relay and that would supply the voltage to the starter.

Feb 14, 2010 | 2003 Chevrolet Silverado 2500HD

1 Answer

2005 Chevy 2500 6.0 V8 will crank but won't start


clogged air filter can make a car hard to start also.leaking fuel injectors flooding out engine.after turning off.take a fuel pressure gauge hook it up.turn ignition on .dont start engine.let your fuel pressure build up.55-62 psi.then turn off ignition.if fuel pressure start leaking down.your fuel injectors are leaking. if they dont leak. you have problems in the ignition system.

Jun 24, 2009 | 2005 Chevrolet Silverado 2500HD 2WD

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