How to Clear Service 4WD Light?

If you’re wondering how to clear Service 4WD Light issue on your 4WD vehicle, then this blog post is just for you! In this article, we will discuss what the Service 4WD Light means, why it appears on your dashboard and most importantly, how to go about clearing it. So without wasting any time, let’s get started.

What Does the Service 4WD Dash Light Indicate?

This light is telling you that there is an issue with your 4WD system that needs to be addressed as soon as possible. It is not safe to continue driving with this issue, and you must take your vehicle to a qualified mechanic or dealership as soon as possible.

What Causes the Service 4WD Light to Illuminate?

There could be a few different reasons why this is happening, but one of the most common is an incomplete shift in gears, which can cause damage to your engine and result in the 4WD service light flashing continuously.

There are several other possible triggers for the Service 4WD light, including low or contaminated fluids, damaged components, and electrical problems.

How To Clear Your Service 4WD Light?

How to Clear Service 4WD Light (1)
How to Clear Service 4WD Light (1)

1. Turning The Ignition on and Pressing the Gas Pedal

One method is to reset the light by turning the ignition on and pressing the gas pedal three times. However, if the issue lies with the 4WD switch on the dashboard, resoldering the connections on the board may be a quick fix to avoid purchasing a new switch.

This issue is often caused by microscopic cracks due to corrosion in the soldered connections on the board, which can be resolved with the use of a soldering iron.

2. Disconnect the Battery and TCCM

This method resets the onboard computer system in your 4×4 and clears the warning light, although it may not work in every case. If you want another option, you can also unplug the TCCM (Transfer Case Control Module), but it’s generally recommended to start with disconnecting the battery first.

To do so, ensure your engine is turned off and use a wrench to remove the negative cable from the battery terminal. Wait for 15 minutes to an hour before reconnecting the cable.

3. Check the Wiring and Switch Assembly

One option is to check the wiring and switch assembly. By giving the assembly a gentle tug and inspecting the wiring, you’ll be able to determine if the issue is a simple switch or wire fault or something more complex. Unfortunately, even the most careful drivers can experience wiring issues due to age, poor installation, or general electrical malfunctions.

4. Check the Transfer Case and TCCM

Take a few moments to visually inspect it and check the fluids while you’re at it. You’ll also want to scrutinize the linkage between the transfer case and the 4WD control lever to ensure everything is connected tightly.

After that, take a look at your fuse box. Are there any fuses related to the 4WD system and TCCM blown? If so, replace them with fuses of the same amperage. Finally, examine the wiring and connectors leading to the TCCM for any damage, corrosion, or loose connections.

5. Using an OBD-II or DRB-III diagnostic scan tool

If your vehicle is equipped with an OBD-II or DRB-III diagnostic scan tool, use it to read the trouble codes displayed on the dashboard. This will give you a better understanding of what’s wrong with your 4WD system and lead you in the right direction when troubleshooting the issue.

Once you’ve located and fixed any problems, clear out the stored codes from the onboard computer using your scan tool before turning off the engine.

How much does it cost to fix a Service 4WD light issue?

The cost of repairing a Service 4WD light issue can vary depending on the root cause of the problem. However, basic troubleshooting steps such as inspecting the wiring and fuses can typically be performed for a relatively affordable price range of $88 to $111.

FAQs about How to Clear Service 4WD Light

Does disconnecting the battery reset the Service 4WD light?

Yes, disconnecting the battery for 15 minutes to an hour can reset the onboard computer system in your car and clear out any errors stored in its memory. However, this may not work in every case and will not fix any underlying issues that triggered the light in the first place.

Can I drive while light 4WD light flashing?

If the Service 4WD light is still on even after confirming that you’ve shifted into gear correctly, it’s crucial to seek the assistance of a professional mechanic immediately. This could be a sign of a transmission problem that requires immediate attention.

Can I Reset the Service 4WD Light Myself?

If you’re faced with the dreaded Service 4WD Light on your dash, disconnecting your car battery may be the remedy you need. While it’s not a guaranteed fix, this method can reset the onboard computer system and hopefully eliminate the warning light.


The Service 4WD Light is an indication that something is wrong with your 4WD system, and it should not be ignored. If the light persists after confirming that you’ve shifted into gear correctly, have a qualified mechanic or dealership take a look at your vehicle’s transmission.

Fortunately, there are various ways to reset the Service 4WD Light ranging from simple instructions like turning on the ignition and pressing the gas pedal three times, to more advanced steps such as using OBD-II or DRB-III diagnostic scan tools. However, if all else fails, disconnecting your car battery may be the answer you’re looking for.

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