Engine wont turn over?

you may have blown the engine, see if it will turn over by hand if it does then reset security system check fluids and then have battery checked for condition including load test This guide will help us fix it

https://www.2carpros.com/articles/starter-not-working-repair

Please run down this guide and report back.

Has turned over just for a second and then nothing. redid cables and it did the same thing tried to do security and it would start for a second and same thing. now it won't even try to do anything. tried to jump it and nothing.

Welcome to 2CarPros.

When you say it won't do anything, do you mean the starter won't engage? Have you checked to see if there is power to the starter when the key is in the start position? Also, have you checked the starter relay or tried a different key?

To bypass the security, turn the key to the run position and allow it to sit for about 10 minutes. The security light should turn off and the vehicle should start if that is the cause.

If that isn't, then check to see if there is power to the starter. You will need a helper for this. Here is a link showing what to do:

https://www.2carpros.com/articles/starter-not-working-repair

Also, check the starter relay in the under hood relay box. See the attached picture.

Let me know what you find.

Joe

We have changed the starter and the relay. the fuse box had mouse nest in it and a couple of bad wires. fixed them, but the box stinks with urine. Today we changed the cables to a top post and it cranked over for a second then nothing. redid cables making sure for good connection. it turned over and the same again. put booster on battery it done the same thing. tried security went through it a couple of times same thing. then the last time nothing. tried jump starting and will not turn over. it's a new battery we put it in my C10 it starts.

Is there anything I can check?

Welcome back:

I hate to say it, but at this point, it becomes a wire tracing process. Basically, since you are not getting power to the starter, start there and trace wires back to see if you can find where the power loss occurs. What has me a bit confused is the fact that it cranked for a second when you disconnected and reconnected the battery. Are you sure the wire between the battery and the power distribution box is good? It seems like you moved the main wire from the battery, which may have allowed for a weak connection again.

I attached 3 pictures for you to look through. It is the entire starting system schematic. I had to break it into 3 pictures for it to be readable to you. I did, however, overlap them so you could follow it.

Start at the battery and follow the power supply to the fuse box and see if there is an issue.

Let me know what you find.

Joe

I have power to starter but not the fuel pump now or the injector 15 amp fuses.

Welcome back:

If you have no power to the fuse box, check to make sure the pins are not corroded or damaged. Also, you should have power there. You may have damage on the back side of the fuse box/wiring that can't be seen. That is the next step. Make sure the battery is disconnected before doing this.

Let me know what you find.

Joe

Didn't work. sprayed starter fluid in it started a few seconds then the next time it made a pooping sound on passenger side of motor but never started again.

Welcome back:

Was it a back fire you heard or did it seem electrical?

Also, were you able to inspect the fuse box for issues?

Let me know,
Joe

Sounded electric and it has been inspected.

turn key everthing looks normal truck won't turn over, battery fine. gear selector shows that it is in 2nd. it is not in 2nd. tried moving selector and rocking truck. no luck.

First thing to check is the park/nuetral switch at the transmission. It could be out of adjustment, and it's not that hard to check. It's on the left side of the transmission and 2 bolts secure it.

Place the shift lever in the neutral (N) position. Regardless of what the display says put the shift at neutral.
With an assistant in the drivers seat, raise and suitably support the vehicle.
Loosen the PNP switch bolts.
With the vehicle in neutral (N), rotate the PNP switch while the assistant attempts to start the engine.
Following a successful start, turn the engine off. Tighten the PNP switch bolts.
Tighten the bolts to 25 Nm (18 ft. lbs.) .
Lower the vehicle.
Check the PNP switch for proper operation. The engine must start in the park (P) or neutral (N) positions only.
Replace the PNP switch if proper operation can not be achieved.

There is a post on the fuse box that has nothing connected to it. is it a ground? maybe it would be the one closest to the fire wall.

Welcome back:

If it is in the fuse box, chances are it is not a ground. Can you upload a picture for me to see it?

Joe

Truck will not start, gear indicator light sometimes stuck in 3rd and is in park. If you play around it will start after 15 minutes of playing around. Even if it is in park and the indicator is shows it is in park it will not start.

sounds like your transmission range switch is faulty. this electronically tells computer which gear you are in. so if it sees you are in 3rd gear it wont let the starter engage. hope this helps

2003 silverodo 2500hd with 8.1 will not crank over replaced ignition lock and switch and starter still will not crank over you can jump it from the starter and it will start relays and fuses all good anyone have any ideas

here is the "starting circuit diagram" from "mitchell i" for your vehicle

it should show it all---to include locations of the goodies you need to check

lemme know if you can read it---i don't know how it will look when it gets posted....looks good in my download

Starter, alternater, cylanoid, battery are all good. It won't even turn over

This guide can help us fix it

https://www.2carpros.com/articles/starter-not-working-repair

Please run down this guide and report back.

how do i check the starter motor?

My truck will not always start. If I bang on the steering column, it will evatually start. How do I remove the ignition tumblar and replace it?

Disconnect the negative battery cable. Caution: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.
Disable the SIR system. Lower the hush and knee bolster.
Remove the steering column trim covers.
With the key installed, turn the key to the RUN position.

Install an allen wrench into the hole on top of the lock cylinder housing. Push down on the allen wrench to release the tab on the lock cylinder inside the lock cylinder housing.


Slide the lock cylinder out of the lock cylinder housing.

Installation Procedure

Install the key into the lock cylinder. Important: The gears between the ignition switch and the lock cylinder housing must be in the correct position. Failure to do so will cause a misalignment of the gears in the ignition switch and the lock cylinder housing, which may result in a NO START or BATTERY DRAIN.
Use a screwdriver to rotate the lock cylinder housing gear clockwise to the start position - allowing it to spring return into the RUN position.

Align the lock cylinder and install into the lock cylinder housing.
Install the steering column trim covers.
Install the hush and knee bolster.
Enable the SIR system. Connect the negative battery cable.

I tried to start the vehicle three mornings in the row, and it won't start. We've changed the battery with a new one, no difference. Boosting seems to be the only alternative. Can you help?

meaning it won't turn over or run? check fuses in underhood fuse box, there are 3all say ign and should be marked in top of fuse box. then check relay to see if pcm is sending signal to relay. check ignition switch as well.see if power is going to starter, if it haas good power hit body of starter with hammer, if it starts the starter is bad.

when i turn the key to the start position the engine will not turn over. i'm not getting power to the starter.all the fuses that have anything to do with ignition have been checked and seem to be fine. battery is reading fine and won't start with a jump. crank relay in the engine fuse box is not making noise.all ready tried switching with other relays. all ready replaced the clutch pedal sensor switch. does anyone have any suggestions?

Did you test any of the circuits at the relay? With the clutch depressed and the key turned to crank, there should be two hot terminals. Did you check the crank fuse and circuit? The signal from the crank fuse tells the computer to ground the coil side of the relay. That's the way I understand it. Without voltage and ground, the relay won't energize.

yeah, i tested them. but can't make heads or tails of it. terminal 87 is not working the way is should. and the fuse is good. i don't know if this a common thing or not.

With the relay unplugged, have a helper turn the key to crank, use a testlite, where the relay plugs in, how many terminals are hot?

Usually with a standard relay, the 30 terminal is voltage for the load side of the relay, the 87 terminal carries voltage to the starter. The 85 and 86 terminals are B+ and ground for the control, coil, side of the relay. Any testing you do, make sure the tranny is in park or neutral and the e-brake is set.

I hope that testing doesn't effect the theft system?

my truck turned off while i was turning. it wont turn on and it wont turn over. the light and radio still work

What I need you to do is have a helper turn the key to the start position while you check for 12 volts to the smaller wire on the starter.

I am assuming the starter isn't working.

Let me know what you find.

Joe

Replaced master and slave clutch cylinders and now the engine won't turn over. Proved starter and solenoid good. Suspect the ignition circuit. Proved all fuses and relays. Possible open wire.

Hi,

Have you checked to see if there is power to the S terminal on the starter when the key is in the start position?

Also, is it the starter that isn't working or is the engine turning and not starting?

Let me know.
Joe

Ran it out off gas now wont start lights go off when try to start but nothing battery is new . Starter won't engage like trying to start in drivi but ran it out off gas then this happened.when turn the key on lights come on but when continue to try and start the lights go off and won't do nothing.

check battery for condition including load test. just because it's new doesn't make it any good. Diehards are good for doing this.also check starter draw may be a bad starter. when done and turning over hope your fuelpump is still good....fuel is their lubricant

yesterday got in turned key did not make a sound. Everything else worked like lights radio windows etc. tried to get a jump was unsuccessful shortly after I turned the key and it started right up. Drove all over did all my errands and she started right up as needed the rest of the day. This morning I turned the key and not a sound. Battery indicator shows she is going to 12 of 14 volts but not losing below 12. New battery alternator and ignition relay in December. Any ideas?

If you are at the end of your wits, you need more wits! Ahahahahaha. Anyway, a good suspect is a failing neutral safety switch/range sensor. Next time this happens, shift to neutral and see if the engine cranks. If that does not help, find the starter relay in the under-hood fuse box, and feel if it is clicking when a helper turns the ignition switch to "crank".

2003 Cevy Silverado will not crank over. All the lights and acsessories work

Get the battery load tested- double check connections make sure its clean and tight- Do this at the starter solenoid find the purple wire have helper put key to start position and look for power -then come back and I'll give you the starter EWD.