Brake Lights Not Working When Headlights Are On

If your Jeep Grand Cherokee’s brake lights are not working, you may want to know what to do. The first step is to check the brake light switch. Identifying the lousy switch may be easy, but you must be aware that the light switch is critical to the safety of your Jeep. If the light switch is broken, the problem is likely with the brake lights.

Fixing a burnt out bulb

If you’re trying to fix a Jeep Grand Cherokee brake light not working when headlamps are on, you’ve probably noticed that one of the brake lights isn’t functioning. The bulb may be burned out, or there’s a problem with the bulb socket or the wiring harness. Either way, you need to fix it as soon as possible to avoid further damage to the Jeep.

To replace the bulb, locate the fuse underneath the housing. If there’s no wire attached, then there’s a good chance the fuse has blown. Most vehicles have fused brake lights, but this wiring isn’t always visible. Fortunately, the procedure for replacing the bulb is relatively simple and inexpensive. Remember that a new bulb will not damage your vehicle’s paint job.

First, you should check if power is getting to the headlights. Connect a voltmeter to the negative lead of the voltmeter to a known good ground, and connect the positive lead to each headlight connector terminal. If both terminals show battery voltage, the problem is with the bulb itself. Then, activate the high beams to determine if the bulb is the problem. If it does, replace it immediately.

In some cases, both headlights may have failed because one of the bulbs has gone wrong. In such a case, you might need to replace both headlight bulbs or replace them both. But the most common reason for this is that the two bulbs aren’t installed properly. They are not necessarily at fault, but they need to be replaced.

Another Cause

Another common cause of brake lights not working is a burnt-out bulb. This problem is common, especially in older vehicles. Sometimes, the problem is caused by the blown bulb or wiring of the turn signals. In addition, American vehicles have blinkers and turn signals integrated into the brake light circuit. If you suspect a burnt-out bulb, check the wiring and the fuse box.

If you’re having a similar problem with your car’s headlights, check the headlight module or daytime running light module. In some cases, you may be having problems with both high and low beams. Depending on which type of headlight failure you’re experiencing, you may need to replace either bulb.

The bulbs in headlights are plugged into sockets, which can become eroded over time. High beams are more critical if you’re driving in a rural area. You won’t be able to see as clearly without the high beams, so slow down when the roads become windy. That’s why it’s critical to check the lights if you’re driving at night.

Checking a fuse

First, you should check the fuse. Your car’s fuse box is a big, black box with many wires. Open the access cover to uncover several fuses. Each fuse controls a specific electrical component. These fuses can be found on the access cover, inside the fuse box, or online. If you can’t find them, you can also read the manual for your vehicle or look for a model-specific diagram on the internet.

Several things may be causing the problem. A broken or frayed wire could be the culprit. Another possibility is a bad electrical ground. In such a case, the wires connecting the brake light switch to the headlights may be corroded or loose. If you find a broken wire or a fuse, the problem is likely in the electrical ground.

If the fuse is still blown, you can test your Jeep Grand Cherokee’s brake lights yourself. You can see one brake light, which means the fuse is not blown. We can see two brake lights, the problem likely is with the fuse. If the problem persists, you should call a mechanic. You’ve checked your Jeep Grand Cherokee’s headlights and brake lights; they should be able to find the problem quickly and easily.

Alternatively, your Jeep Grand Cherokee’s taillights may not be working. A faulty tail light sensor can also cause this problem. Pull the dashboard out and inspect the fuse box to test the light. If you can’t find the fuse, check your taillight fuse. You can also check the fuse box under the hood or underneath the steering wheel. Note: Unlike headlights, taillights and brake lights are different. Brake lights are activated when you hit the brake pedal.

Read More: How Many Gallons Does a Jeep Wrangler Hold?

Replacement

Another common cause of brake light problems is a burned-out bulb. Although newer models use LED lights, older models still have incandescent bulbs that need replacing. Luckily, replacing them is inexpensive and easy with essential tools. If you cannot find the fuse for the brake lights, you can easily replace them. This process is inexpensive and quick and can save you time and money.

If none of the above steps work, try checking a fuse for Jeep Grand Cherokee brake lights. After checking the fuse, you can now test the other two parts of the circuit. If the bulbs themselves are fine, you may need to check for ground problems or other electrical components. If you still haven’t found the cause of your brake lights, the fuse is likely the culprit.

Another common issue for vehicle owners is blown fuses or burned bulbs. Although these problems are relatively easy to fix, you should consult an automotive repair shop for professional assistance. To avoid damaging your vehicle’s safety, never leave it unattended for too long. Checking the fuse for Jeep Grand Cherokee brake lights not working when headlights are on is one of the first steps.

Identifying a bad switch

You may have a blown a fuse if your Jeep Grand Cherokee’s brake lights aren’t working when headlights are on. Replace the fuse with a new one with the same amperage. However, it would help if you tried to locate the cause of the blown fuse first to avoid this problem in the future. Some other causes of brake light not working while headlights are a terrible electrical ground, a faulty switch or a broken wire.

First, check the socket. There’s probably a short if it doesn’t flash when headlights are on. Test the socket using a volt ohm meter or a test light. If the socket has no voltage, try tracing the wire to the 12V power supply to see if the problem lies there.

If the light is stuck on, you can try to test the fuse by yourself. You’re able to see one of the brake lights. You’ve checked the fuse. If you see one light on, the fuse is not blown. Having no brake lights is just as dangerous as driving without any headlights. It’s not only a safety hazard, but it also increases your risk of rear-ending someone.

To identify a lousy switch for Jeep Grand Cherokee brake light failure, you must first find the source of the problem. The culprit is usually the switch itself. A bad switch can be a short circuit or an open circuit. Check for voltage drops in the switch terminals to determine if it’s the switch. Then, replace the switch, and the brake lights should work again.

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