Skip to Content

4 Reasons for Red Flashing Light Above Temperature Gauge on Jeep Wrangler

If your Jeep Wrangler warning lights pop up, it means your vehicle is facing issues with maintaining proper operation. To avoid further damage to your car, you must inspect and fix them. Among them, the red light flashing is familiar to the jeep wrangler.

You can find the warning light for a few reasons. Most of the time, you can notice the red light above the temp gauge due to a faulty fuse. 

In the guide, you will know a few reasons why the red light is flashing above the temp gauge on your jeep wrangler. Also, some possible fixes will be discussed in the below guide to help you eliminate the warning light.

What Does Red light On Jeep Dashboard Mean?

Though the red light flashing is so common with the jeep wrangler, there isn’t much talk in the user manual. The exact name of the Red light above the temp gauge is “Vehical Security Light.” 

When the red light appears, the vehicle is going through a systems check, which means your vehicle security system is activated. 

Once the vehicle security alarm is armed, this light will flash rapidly for approximately 15 seconds, then slowly until the alarm is disarmed. You can still drive the car if you see the warning light. But, many users find that the vehicle is turned off after 2 seconds when they start the car with the warning light.

Why Is Red Light Flashing Above Temp Gauge On Jeep Wrangler?

Whenever you notice any warning sign on your vehicle, you should need to inspect the issue and fix it. But, before knowing the fix, you need to know the main reason for these problems. For this, below are mentioned some possible reasons why the red light flashing above the temp gauge:

  • Electronics Issue

During normal operation, when you start the vehicle, the vehicle security light will appear for 3 seconds to check the bulb. If the light remains according to the 2009 wrangler manual, there is an electronics issue on the vehicle. Also, there is a possibility that someone is trying to start the engine with an invalid key.

  • Key Fob Battery

If your jeep wrangler runs with a key fob operated by a battery or chip. Most of the time, you will notice the light pop up if the key fob battery runs out. Then, the security light comes as they cannot recognize the key, or the chip in the key isn’t reading properly.

  • Fuses Aren’t Functioning Properly

The M13 and IOD fuses are related to a vehicle security system. Most of the time, the fuses related to the vehicle security system don’t work properly or lossen which triggers the warning light. Also, sometimes the fuses are blown out or damaged, which causes the problem.

  • Dying Battery

The warning light might blink if there have any fault with the battery. Also, the alarm may be triggered as a warning signal if it has low voltage or water levels is low on the battery. 

How To Fix Red Light Flashing Above Dashboard Temp Gauge On Jeep Wrangler?

Here are some easy methods you can follow to fix the red light flashing issue:

Check Fuses

You already know that fuse is the main reason why you get the warning light. So, you need to check out the fuse related to the temp gauge light. 

  • First, open the vehicle hood and find the fuse box in the engine compartment.
Find the Fuse Box
  • After opening the fuse box, check which fuses are loose. You especially need to check the M13 and IOD fuses. Check whether they are blown or not. If they are in good condition, wait 30 seconds before putting them back.
  • Now, put back the fuses which you remove and try to start the vehicle. If this occurs due to fuses, then the light will disappear.

Key Fob Battery Replace and Reprogram

If the problem occurs due to the key fob, then you need to replace it and reprogram it to get rid of this problem. Below are mentioned a few steps to replace the battery and reprogram the keyfob:

Replace process:

Step 1: Get a new CR2032 battery for the wrangler. You need to use a large and small screwdriver to do the process.

Step 2: You will find an empty space on the key fob. Insert the screwdriver on it, push it up, and the above cover will go apart.

Key fob battery replace and reprogram step-2

Step 3: After that, you will get a small notch around the battery. Insert the small screwdriver on it and push it up, and the battery will get out of the compartment.

Key fob battery replace and reprogram step-3

Step 4: Now, put the new battery on it and put together the removed part. 

Reprogramming Process

Step 1: After replacing the key fob, sit inside your jeep wrangler, and close all the doors.

Step 2: Press the brake pedal and insert the key into the ignition.

Step 3: Turn the key into the ON position and wait for around 8 to 15 seconds. You will notice the security light will go ON for around 3 seconds.

Step 4: If the light is ON, it means your vehicle key is reprogrammed. Then, exit the vehicle and lock and unlock the vehicle. Hopefully, it will solve the red light blinking issue.

Also, if you have another spare key, you can use the key to solve the issue.

However, if the above methods don’t work for you, you might need to inspect ECU or battery. As a user, you might not get the problem. For this contacting a professional will be a wise decision.


If your Jeep Wrangler Red Light Flashing above Temp Gauge means the vehicle security alarm is activated. It can happen for a few reasons. I hope now you know what the main reason for the flashing light is. Also, the above guide suggested a few easy fixes which help to get rid of the problem.

Related Posts: