Car Will Not Jump Start But Lights Come On? 5 Common Causes And Quick Fixes

Find out why your car won't start, even though the lights work fine.Discover the usual reasons your car might be acting up and follow our easy steps to get you back on the road in no time!

Why wont my car start after jumping but lights work fine?

This is so frustrating! You've connected the jump cables and hear a clicking sound or no sound at all, but the lights work fine. This seems to indicate that the battery should be fine, right?Not necessarily. Here's an explanation of what happens in the real world, along with five detailed reasons why.

Cause 1: Starter Motor Failure

You turn the key or press the button and hear a clicking sound or no sound at all. The dashboard lights up, but the engine does not start. This has happened to a coworker. The starter motor drives the engine to turn over.Even if the battery has enough power for the lights, it may not be able to provide the high current required by the starter motor.Therefore, try testing the starter motor.If it fails, it should be replaced.

Cause 2: Corroded or Loose Battery Terminals

You start your vehicle by jumping and the dashboard lights come on, but the power supply to the starter motor is erratic or obstructed.This is really annoying. Corroded or loose connections may allow small loads to work properly,but high-current systems can't get enough power.Then clean and tighten the battery terminals. Check for white/green dirt or broken cables

Cause 3:Blown Fuse or Bad Relay

The vehicle seems like it should be able to start, but it doesn't respond when the key is turned or the starter button is pressed. This is because the starter relay or ignition fuse may have been damaged, causing the ignition signal not to be transmitted to the starter. Therefore, check the fuse box. Replace any blown fuses or faulty relays - especially the starter relay or ignition relay.

Cause 4: Failed Ignition Switch

If your accessories are stuck and the lights come on, but turning the key doesn't do anything, it might be the ignition switch. This little part sends power from the battery to the starter, and if it's not working right, the circuit can break at the switch. It's a good idea to call a mechanic; they can check the switch with a multimeter. If it turns out to be faulty, it'll need to be replaced.

Cause 5: Engine or Fuel System Problems

Symptom: Engine cranks but does not start, or fires briefly before dying. There could be a faulty fuel pump, clogged fuel filter, faulty crankshaft sensor, or no spark. These problems cannot be solved by hitching a power supply. Scan for trouble codes. Listen for fuel pump pre-supply sound. Further diagnostics can determine if there is a lack of fuel or spark.

Image show: Motorycycle 12v Battery

How long does it take to jump-start a compeletely dead car battery?

Jumping starting a dead battery with a portable 12V jump starter takes only 1–2 minutes.The time it takes to jump start a dead battery can vary significantly depending on the method and condition of the battery.Traditional jump cables require 2-5 minutes of charging from another vehicle, but a 12V jump starter provides immediate convenience without having to wait for another vehicle.

What does it imply when your car won't start 

If the car won't start but the lights illuminate, it's more than just a dead battery. It could be a malfunctioning starter, ignition switch, or fuse.Users searching for this problem often compare jumper cables vs.jump starters - looking for a faster, more portable starter solution that is easy to use and low maintenance.

Can a car battery be so dead and be jumped?

Yes, if a 12V car battery is damaged or has zero voltage, it may not start with jumper cables. In this situation, it might not work even with jumper cables. Portable starters usually work better. Want to start your car?

Here's a friendly guide to help you start your car with ease.
1. Using a multimeter, check the 12V car battery voltage.
2. Connect the positive clamp from the portable starter to the positive wire of the dead battery.
3. Connect the negative clamp to the vehicle grounding point or negative terminal.

4. Turn on the portable starter and wait 30 seconds.

5. Start the engine immediately (no long wait)

6. After engine starts, remove clamps 12V car battery in reverse order.

Image show:OEM MANUFACTURING

When a battery is completely dead, it will show certain signs that it is completely depleted and cannot produce or store power.
1.Take a voltage reading.A healthy 12V car battery should show a voltage of 12.6 volts when it's fully charged.
2. Examine the accessories and lighting. The battery cannot manage the load if the headlights are dim at startup, even though the interior lights may be on because they use little power. This is a warning sign.
3. Failed attempts at jumping.Jump cables have been used, but to no avail.If your 12V emergency jump starter isn't working properly, the battery may be sulfated or internally damaged. Here's a tip: Be sure to charge, maintain, and check the condition of your battery regularly - especially when the weather is cold! A portable emergency jump starter can be your savior, but if the battery is completely damaged, it will keep giving you trouble ...... until you replace it with a new one!