2002 Dodge Caravan,3.3L,Engine won't turn over at the key.Battery,starter and relay are good.Relay doesn't function when plugged in.It has 2 feeds.If you run a ground to the ground side of the relay,engine turns over but doesn,t run. Operating shift lever makes no difference.

I would check the starter for voltage first - there is a starter relay that is grounded by the PCM. If the ASD relay is faulty the pcm won't have power. You should have battery power to the starter and power on the solenoid when you turn the key to start.

Are your headlights bright or check voltage ar battery with lights on or with someone cranking engine. Cranking not below 10.5 volts. If it is replace battery.Remove terminals on battery and clean. Now go into fuses and replace starter relay with another one in box it usually says spare or remove the same one from another circuit and try cranking engine if it cranks replace relay if it doesn't have someone try to start it and you hit the starter with a hammer hard a few times while it's being cranked if it cranks all of a sudden the starter has a bad armature and needs to be replaced

Start by cleaning battery terminals try to start if headlights are bright and nothing check the starter relay by the fuses stick the same type from another circuit or a spare one where it says spare. Try to start if the lights are bright hit the starter with a hammer a few times while someone has the key turned if it starts you need a new starter. If lights go out recharge battery or replace battery

Possible causes are: 1. Loose or corroded battery cables. 2. Bad starter 3. Dead battery. Try tapping on the starter with a hammer while someone is holding the key in the start position. If it starts then replace the starter. Thanks

Definitely a starting system problem. That sound you hear in the back is the fuel pump.

Starting system circuit components (besides wiring harness)
1. Ignition Key Switch - closes the starter relay control circuit to energize the relay and close the contacts inside the relay (you can check this by locating the relay in the underhood fuse/relay box and have a friend turn the key while you listen/feel if the relay 'clicks'
2. Starter Relay or its Contacts
3. Starter Solenoid - pushes/pulls the starter gear into the engine's flywheel ring-gear and its contacts close to provide battery power to the starter itself.
4. Starter itself - poor brush contact with the armature's commutator will prevent the starter to spin/turn

If you are 'Electrically' talented, you can check to see if you're getting battery power to the starter solenoid by using a simple 12 volt test light/bulb. Connect one lead to the starter solenoid terminal and the other to chassis/engine ground and have a buddy turn the ignition key - if the light turns 'ON', then you know that particular circuit is OK but the starter solenoid is not energizing to push the starter gear into the flywheel ring-gear to turn the engine over. If it doesn't, the problem is elsewhere (wiring, starter relay, starter relay control circuit, etc).

You can have a qualified Hyundai Service Technician properly diagnose your vehicle. OR, you can Go to www.hmaservice.com and register your vehicle by VIN #.. you'll then have access to wiring diagrams, shop manuals, service bulletins, illustrations, etc.

Sounds to me like the starter or starter relay, OR did you check all the fuses? When the starter doesn't click or turn over the engine it is likely a problem with it or the power supply to it. Start with the easy thing. check the fuses, then the relay.
The P0300 is usually caused by something other than the spark plugs or coils. A fuel/oxygen sensor can cause this code. I would say that doesn't have anything to do with not starting.
Good luck.

Thanks for using FixYa.

Gaker

Hello fellow auto mechanic. Let's take one step at a time .Your engine turns over because your starter is connected directly to your battery.It's possible that the crankshaft sensor was the the problem, but NO. Also new fuel pump well maybe but not yet. There may be more to this story and as always not what you may have done but what you don't know you have done.
First when you put your key into your ignition and turn to on you should here a noise at the back of your cars fuel tank. The sound will be a whiiiirrrrr sound indicating that your fuel pump is doing it's job and pushing fuel to the engine. It will be a very significant sound and you will know it when you here it. If this doesn't happen go to your power control center under your hood on LEFT side open it and you will find a relay for your fuel pump. This is an easy check because you can pull the relay for your horn LABELED the same, and use in place of your fuel pump relay to see if you can start your car. If this doesn't do it ,one more test look at the relays and find the ASD relay this is the main shut off to your vehicle. Now if this doesn't work it is very possible that you or whoever replaced your fuel pump may have crimped some wires or even forgot to hook up the the plug to the pump. This kind of stuff happens all the time, that's why people are always asking questions.Check the simple stuff first, and I believe you will find your problem. It's probably something very simple , don't get discouraged.
One more thing , why are there so many 96 Caravan problems? Please get back to me on the above and let me know if I have helped you. Don't forget to vote and GOOD LUCK.

The security system does not disable the starter, it only disables fuel to the engine. In the fuse block under the hood, locate the STARTER relay. Place your hand on this relay and see if it clicks while someone else turns the key to start...if the relay is ok then the starter itself is faulty. Good luck, i hope this helps.

If you mean that you turn the key to start but the starter motor doesn't engage the flywheel until the key is turned to start several times, try this. Look under the front of the car and locate the starter motor, which will be at the front of the oil pan. Tap the end of the starter motor with the handle of a large screwdriver a couple of times. If the starter then engages, the starter motor is bad. What happened to the last 99 Caravan (w/175,000 miles) was that a large amount of oily gunk had made its way into the part of the starter that housed the motor brush ***'y, preventing the motor brushes from moving freely and keeping one or more of them from making contact with the armature. The fix was to spray cleaner into the unit. That freed up the brushes and allowed the starter to work. That was a year ago. If you mean that the motor turns over, but doesn't start until you have tried 3 or for times, then I suspect a fuel problem. I have seen a problem where the fuel drains out of the fuel line when the car is off so that repeatedly turning the key to start runs the fuel pump which must refill the fuel line before it can reach the engine. Check the fuel pump, the fuel pump relay, etc. Or, locate the fuel pump relay, under the hood, on the driver side fender. Carefully remove the relay and remove the black plastic cover by lifting the two tabs. Carefully reinsert the relay, sans cover, and have an assistant turn on the key. If the contact "pulls in" then have your assistant remove the gas cap and listen as you manually close the contact with your finger. ( It's okay, the 12 volts won't shock you!) If they can hear a whirring sound, then the pump is working. Have someone start the car while you keep the relay engaged. Hope this helps. Dano

Looking at a wiring diagram an using a DVOM - digital volt ohm meter an testing the electrical circuits is the proper way to diagnose , not just replacing parts . If you do not know this ,your best bet , take it to a qualified repair shop. What engine ? 2.4 or 3.3 L .... Starter motor relay , PNP - park neutral position switch . B+ voltage at fuse # 9 40 amp. location - integrated power module .Just Replacing modules isn't the way , may need to be programmed -DEALER . Do you know what a starter relay is an how it works ?
How to Test and Troubleshoot Starter Problem