Left Rear Turn Indicator Failure: Quick Solutions for a Safe Drive

Dealing with a left rear turn indicator failure can be more than just an inconvenience; it’s a safety concern.

This article delves into the common causes of such failures, particularly in vehicles with LED lights, and provides practical solutions to ensure your drive remains safe.

Whether you’re facing intermittent grounding issues or resistor failures, understanding these quick fixes can help you address the problem efficiently and maintain road safety.

Left Rear Turn Indicator Failure: Quick Solutions for a Safe Drive

Understanding Left Rear Turn Indicator Failure

I noticed that left rear turn indicator failure can be a common issue for some vehicles, especially those equipped with LED lights.

For instance, I found a discussion about a Chevy Silverado experiencing such a problem, although the taillights and indicators were working fine. Now, let me share with you some possible causes and solutions for this problem.

Intermittent or improper grounding might be one reason for left rear turn indicator failure. A quick fix is to run a jumper from a good ground source to the negative wire of the turn indicator, as suggested in this GM Truck Club Forum.

Another potential cause is the failure of resistors, often seen in vehicles with aftermarket LED lights. This results in a phenomenon called “hyperflash,” where the turn signal flashes very fast. I found this explanation in a Reddit discussion.

To summarize what I’ve learned, left rear turn indicator failure can happen in any vehicle, but especially in those with LED lights. Fixing this might involve grounding adjustments or addressing a resistor issue.

It’s essential to diagnose the cause accurately and apply the appropriate solution to ensure vehicle safety and proper functioning of the turn signals.

Left Rear Turn Indicator Failure: Quick Solutions for a Safe Drive

Common Causes of Failure

As I started investigating left rear turn indicator failure, I found that it could be caused by various factors. Here are some common reasons:

1. Burnt Out Bulb: The most common cause of a left rear turn signal failure is a burnt-out bulb. Since bulbs don’t last forever, they eventually need to be replaced.

For example, a Chevy Silverado owner reported that replacing the bulbs resolved their issue.

2. Faulty Wiring: Sometimes, a wiring issue can affect the turn signal operation. A broken wire or a loose connection may interrupt power flow, leading to the problem.

One way to detect this is by checking for intermittent voltage readings, as found by a truck owner who resolved their issue this way.

3. Ground Issues: A bad ground connection can also cause rear turn indicator failure.

Running a jumper from a good ground to the negative wire could settle this issue, as suggested on a GM Truck Club Forum.

Symptoms of Failure

I noticed my left rear turn indicator started acting weird. At first, it seemed to blink normally, but after a few seconds, the blinking speed increased significantly.

I tried changing all four bulbs for both left and right, but it still showed a failure message. This may indicate a problem with the left rear light housing.

When my left rear turn indicator failed, it caused some other issues as well. My brake lights, including the third light on top of the cab, stopped working.

Left Rear Turn Indicator Failure: Quick Solutions for a Safe Drive

I also noticed that my license plate light went out. Upon checking the fuses, I found they were fine. This led me to believe that the issue could be due to poor grounding.

When my turn indicator failed, I didn’t see any external damage or visible problems with the wires.

However, it’s still essential to inspect the connections and the turn indicator assembly to rule out issues like water getting into the light housing, particularly if you have LED lights.

In some cases, it might be necessary to replace the entire housing if the root cause of the problem is a defect in the turn signal assembly.

Remember to conduct a thorough investigation to determine the cause of your turn indicator failure. Addressing the issue promptly will not only keep you safe on the road, but also help you avoid potential legal problems related to malfunctioning turn signals.

Impact of Ignoring the Problem

Ignoring a left rear turn indicator failure can lead to several issues.

I might face difficulties while driving as other motorists might not be aware of my intention to change lanes or make a turn.

This could lead to accidents and endanger the safety of both myself and others on the road.

There is also the possibility of being pulled over by law enforcement and receiving a ticket or fine for having a malfunctioning turn indicator.

This can be an unnecessary expense and hassle to deal with, especially if the problem could have been fixed relatively easily.

Left Rear Turn Indicator Failure: Quick Solutions for a Safe Drive

One common cause of left rear turn indicator failure is a resistor failure in vehicles with aftermarket LEDs.

Another possible reason might be related to wiring harness issues. For example, a 2018 Silverado owner replaced the wiring harness and still faced difficulties with their left rear turn indicator.

To sum up, neglecting a left rear turn indicator failure can result in dangerous situations on the road and potential fines.

So it’s essential to address this issue promptly to ensure a safe driving experience and avoid unnecessary expenses.

Troubleshooting Steps

I’ve come across a few common issues that might cause left rear turn indicator failure. To help you out, I’ve listed some troubleshooting steps that you can follow:

Step 1: Check the bulb
It’s essential to first ensure that the bulb is working correctly. In some cases, the issue could be as simple as a burnt-out bulb.

Replace the bulb if needed, and check if the problem persists. A great example of this can be found in this Silverado forum, where a user with LED lights faced a similar issue.

Step 2: Inspect the wiring
Wiring problems can also cause turn indicator failure. Look for any loose connections, broken wires, or corrosion in the wiring. If you find any issues, make sure to fix them promptly.

Step 3: Verify the ground connection
A poor ground connection can result in turn indicator failure as well. For instance, a user in GM Truck Club Forum suggested running a jumper from a good ground to the negative wire, which might help solve the problem.

Step 4: Look for water damage
In some cases, water can get into the light housing and cause the turn indicator to fail.

Silverado owners have reported such problems that they had to replace the entire housing. Check your vehicle for any signs of water damage and take the necessary action if needed.

I hope these steps come in handy when troubleshooting your left rear turn indicator failure. Good luck, and if you face any further issues, don’t hesitate to reach out to a professional mechanic for assistance.

Preventive Measures

Regular Inspection

I always make sure to inspect my vehicle’s turn indicators regularly. Short and frequent inspections help me catch any issues early.

For instance, if I notice that a bulb is dimmer or flickering, I can replace it before it fails completely.

Proper Installation

When it comes to turn indicators, proper installation is crucial. I ensure that all connections are secure and well-grounded.

This helps prevent issues like grounding problems that can cause indicator malfunctions.

Furthermore, installing components correctly can extend their lifespan and maintain their optimal performance.

Choosing Quality Bulbs

As part of my preventive measures, I choose quality bulbs for my turn indicators.

High-quality bulbs are less likely to fail prematurely, reducing the risk of left rear turn indicator failure.

When shopping for bulbs, I check the manufacturer, warranty, and customer reviews to be sure I’m getting a reliable product.

Left Rear Turn Indicator Failure: Quick Solutions for a Safe Drive

Warranty and Insurance Coverage

I have some helpful information for all those concerned about left rear turn indicator failure in their vehicles. We all know the importance of keeping our vehicle in good working condition, and a functioning turn signal is essential for safe driving.

One important aspect to consider is the warranty. If your vehicle is still within its warranty period, the left rear turn indicator failure might be covered.

For instance, an owner of a Chevy Silverado mentioned that their LED light housing, which experienced a turn indicator failure, was covered under warranty. So, make sure to check your vehicle’s warranty terms and conditions at the time of purchase.

As for insurance coverage, it can vary depending on your specific policy and the cause of the failure. Generally, most insurance policies may not cover turn indicator failures unless they are a result of a collision or other covered accidents.

If you are unsure about your insurance coverage, the best course of action is to contact your insurance company directly and inquire about your specific policy.

In cases where neither warranty nor insurance is an option, self-diagnosis and repair might be considered.

When examining the issue, be sure to also check other components such as the wiring harness, as one Silverado owner discovered the problem was solved by replacing the harness.

Overall, it’s essential to stay informed about the warranty and insurance coverage for your vehicle. If needed, plan for a repair or replacement in case you face left rear turn indicator failure.

Left Rear Turn Indicator Failure: Quick Solutions for a Safe Drive

Frequently Asked Questions

What are common causes for left rear turn indicator failure?

Left rear turn indicator failure can be attributed to various reasons such as a burnt out bulb, poor electrical connections, or faulty wiring. A dual purpose bulb with a shorter lifespan might be used, causing it to burn out more quickly.

How can I troubleshoot left rear turn indicator issues?

Before troubleshooting, ensure that the vehicle is in a safe location and the ignition is off. Firstly, inspect the bulb to check if it’s burnt out or damaged. If the bulb seems fine, examine the connections for any signs of corrosion or damage. It’s also essential to review the wiring within the circuit to ensure it’s functioning correctly.

What are the steps to replace left rear turn indicator bulb?

  1. Locate the appropriate bulb housing by referring to your vehicle’s manual.
  2. Remove any covers or fasteners holding the housing in place.
  3. Disconnect the electrical connector.
  4. Turn the bulb counterclockwise to release it from the socket.
  5. Replace the bulb with a compatible new one.
  6. Reinstall the bulb, reconnect the connector, and secure the housing.

Are there any recall or common issues affecting turn signals in Chevy and GMC vehicles?

While specific recalls may not exist, some forums suggest that Chevy and GMC vehicles might experience turn signal issues similar to other cars and trucks. These issues are generally isolated, but it’s critical to address them when they arise.

How can I check for a blown fuse related to left rear turn indicator?

To check for a blown fuse related to the left rear turn indicator, locate your vehicle’s fuse box, usually found under the dashboard or in the engine compartment. Consult your owner’s manual to identify the specific fuse for the turn signal. Examining the fuse visually or using a multimeter, check for any breaks in the metal wire inside the fuse or other damages.

Does left rear turn indicator failure affect other vehicle lights?

Yes, the left rear turn indicator failure can affect other vehicle lights, mainly if it’s caused by a problem with the wiring or electrical system. For instance, a damaged wire within the circuit might influence the performance of brake lights or running lights. Consequently, it’s essential to address the turn indicator failure as soon as possible.


In conclusion, addressing a left rear turn indicator failure is crucial for safe driving and avoiding potential legal issues.

From simple bulb replacements to more complex wiring and grounding fixes, this article has covered a range of solutions to help you tackle this common problem.

Regular vehicle maintenance and prompt attention to such failures not only enhance your safety on the road but also contribute to a smoother driving experience.

Remember, when in doubt, consulting a professional mechanic is always a wise decision.