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Vehicle don't start check cables no current reaching

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Check for connection in engine got loose,check ignition coil.

Posted on Jun 04, 2009

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I have a 1999 dodge Durango 4x4 with a 5.9 magnums v8. I've gone through 3 ignition coils in a 2 week span. Could it be just a bad "run" from the manufacturer? Or is there something I'm missing?


Hi Chris
I am not familiar with your particular vehicle. But...
The main reason that an ignition coil would fail is through an open circuit in the primary winding. (Use the ohms section of a multimeter to check for continuity) Now, the only way you can open circuit the primary winding is to burn out the primary winding.
Considering that this connects to 12 volts via the "points" or "contacts". There isn't much to go wrong.
So.... Here's what I think is happening.
From my old auto electrics background.... A coil connects to the vehicles 12 ignition circuit via a special nichrome wire (often inside the wiring harness) This Nichrome wire acts as a Resistor before the 12v current reaches the Coil's Primary winding. This cuts down the current when the the ignition key is in the running mode. When you start the vehicle, the full 12v current bypasses the resistor to give to a BOOST while starting the vehicle. When the key returns to the Running position the coil is being supplied by the resistance wire so the current is reduced.
Note: There would have been 2 wires connected to the Coil originally. One is 12v from ignition switch "run" position and one from ignition switch "start" position.
If you have wired the vehicle different than the original wiring or have used a different wire then you may actually be running the vehicle directly on 12v from the ignition/battery. This would eventually burn out your coil.
If necessary, add a resistor (large wire wound, ceramic), to the circuit. Purchase or make your own.... once you know how many ohms you require to reduce the current.
Hope this solves your problem. Pitty you have paid for 3 coils before finding out.

Cheers

Sep 14, 2016 | 1999 Dodge Durango

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Jump starting a Buick Lacrosse 2005


Jump starting
If your vehicles battery has run down, you may want to use another vehicle and some jumper cables to start your vehicle.
1.Check the other vehicle. it must have a 12-volt battery with a negative ground system.
2.Get the vehicles close enough so the jumper cables can reach, but be sure the vehicles are not touching each other. If they are, it could cause a ground connection you do not want. You would not be able to start your vehicle, and the bad grounding could damage the electrical systems.
3.Turn off the ignition on both vehicles. Unplug unnecessary accesories pluged into the cigarrete lighter or the accessory power outlets. Turn off the radio and lamps that are not needed. This will avoid sparks and save both batteries. And it could save the radio.
4.Open the hood on the other vehicle and locate positive (+) and the negative (-) terminal locations on that vehicle. You will not use yours vehicles battery for jump starting. It has a remote positive (+) jump starting terminal, located on the underhood fuse block, for that purpose.

on Oct 08, 2010 | Buick LaCrosse Cars & Trucks

2 Answers

Air bag light stays on also battery and abs


When I had that combination of lights on, it was the alternator. How do you know your alternator is good?

Oct 30, 2015 | 2010 Ford Escape XLS

1 Answer

What short is causing my vehicle not 2 start


I would first check that your transmission safety switch is working and properly seated where it needs to be, if the indicator is not exactly where nutural or Park is suppose to be then it will not allow the current to reach the starter

Jun 28, 2014 | Cars & Trucks

1 Answer

Battery drain


A wiring diagram of entire vehicle & the
ability to use a half decent volt meter, on the
amp & millamp scale

Pull all fuses,one at a time, until something
indicated the current drain & it stops

Need the meter in series in either battery cable &
ability to see the meter

You have to know what relays need to time out & see
if they do,so don't keep opening the door or you start
the process over.

The battery has to be good also
Not over 5 years old & has to read over 12.6 V when you start
your checking

If this is a 20 year old car,visually check for corroded
fusible links first & don't forget alternator diode leakage

May 23, 2012 | Cars & Trucks

1 Answer

It wont start, just makes a clicking noise. put new battery cables on, new starter, new cylinoid. tried to jump start it, wont jump start either


Clicking noise usually means a bad connection at the battery terminal. It can also be a bad connection at the starter or solenoid.
Re-clean and tighten battery cables,and if that doesn't do it,re-tighten starter connections.Don't overtighten as copper-bronze studs can break easily.If your Ranger is standard shift (4 or 5-speed), don't get under the car or in front of it without the battery cables disconnectede or the shifter in neutral,as any current you inadvertently send thru the starter can engage it and run you over or knock the vehicle off jackstands or blocks. don-ohio

Oct 13, 2011 | 1992 Ford Ranger

2 Answers

2003 buick century won't start. Ignition switch goes clickety-clickety. Can still lock doors and the lights come on. Noticed the "check engine" light but don't know if it would stay on...


Just because the battery has enough power to operate the lights and door locks does not mean it would pass a load test. If the battery checks out OK then check the battery cables. use one side of a pair of jumper cables to bypass each cable starting with the negative cable. if the vehicle now starts, replace the cable. The positive cable is harder to check using this method. attach one end of the jumper cable to the starter terminal making sure that the end of the jumper cable is not touching the engine and then attach the other end to the positive terminal of the battery. If sparking occurs when this end is connected then the jumper cable is touching ground and must be repositioned. If the problem still exists then the most likely cause is the starter solenoid. Always wear safety glasses when working around a battery.

May 13, 2011 | 2003 Buick Century

1 Answer

Im not a mechanic and am familiar with my vehicle, the battery has been checked and is fine when hooked up it sparks but there is something severe that is draining the battery within an hour or two. It...


I do not think you have a short circuit because it would blow a fuse or burn the insulation off the wire and smoke a lot. Therefore, if the battery is being drained it could be a component pulling too much current when the vehicle is off. I have seen when the ignition is switched off the accessory power is in the on position, which will drain the battery. I find it strange that if you jiggle your cable the vehicle may start. This makes me think it could be a lose ground connection. You will have some components with constant power and if the positive or ground connection is loose or bad it will pull more current from your battery. So check connections to the block chassis and fuse bus first. If you obtain a multimeter (Volt-Ohm-Amp) and set it to amps to read current you can narrow the possible cause. Understand the meter may only read a maximum of 500 milliamps .5 amps or 10 amps so make sure the engine off so you do not max out your meter. Disconnect one end of your battery (Pos or Neg) and set your meter on amps and make sure you have your meter probes plugged in correctly to read amps. Connect one end of the meter probe to the battery cable and the other to the battery. You should see a reading on your meter. If you take a jumper cable and connect it to the vehicle chassis and the other end to the multimeter and the other multimeter probe to the negative terminal of the battery the current reading should be the same. If the reading is less then your ground connection on your vehicle is bad. Open the fuse box and randomly pull a relay and note the amperage reading on your meter. If you see the current drop note the relay and current reading on a piece of paper then replace the relay. If the current did not drop put a piece of masking tape on it to mark it as being tested. Now start pulling and replacing fuses again looking at the current reading for any changes noting the change on paper. Do the same for the fuse box and relays inside the vehicle. You can now see which components are pulling current when your vehicle is off which should help you find your problem.

Aug 17, 2010 | 1999 Chevrolet Blazer

1 Answer

Have tried 2 new batteries. car starts at once. runs smoothly. but when ignition is switched off for about 30 minutes, the battery goes dead! The alt. has been checked OK. The problem started when we...


The cause is most probably a current drain on the battery when the vehicle is switched off.

Check for a drain current from the battery while the vehicle is standing with engine and all electrical system turned OFF -
[ while in this condition, if you don't have a current meter, temporarily connect a small bulb (6-12W) in series with the main battery ground cable - lamp glow indicates current drain - remove fuses, disconnect items to identify cause of current drain],

Also check alterator output voltage (measured across the battery terminals) is approx 14.5V when engine is running and electric system is loaded with headlights or blower fan on.

Oct 28, 2009 | 1994 Toyota Camry

2 Answers

Car will not crank after battery change


check to make sure the terminals are on securely, check to make sure there is 12v

Jul 30, 2009 | 1997 Rolls Royce Silver Spur

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