How to Replace the Turn Signal Wiring on a 1987 Toyota Corolla

How to Replace the Turn Signal Wiring on a 1987 Toyota Corolla


Replacing the turn signal wiring on your 1987 Toyota Corolla can be a straightforward project that will restore proper function to your turn signals. While it may seem intimidating, it only requires some basic tools, a repair manual for reference, and a little bit of time and patience.

I recently replaced the turn signal wiring on my own 1987 Corolla, and learned firsthand everything involved in the process. In this guide, I'll walk through all the steps I took to replace the wiring and get my turn signals working properly again.

Gather the Necessary Tools and Supplies

Before getting started, you'll want to make sure you have everything you need for the job. Here are the basic tools and supplies I used when replacing my Corolla's turn signal wiring:

Having these tools and supplies on hand will make the wiring replacement much easier. The repair manual is especially helpful for identifying the correct wire colors and circuits.

Locate and Access the Turn Signal Wiring

The first step is to locate the turn signal wiring under the dashboard and gain access to it.

Gaining easy access to the entire turn signal wiring run is crucial for the next steps.

Remove the Old Wiring

With access to the wiring obtained, you can now detach and remove the old turn signal wires:

Thoroughly removing the old damaged wiring prepares for installation of the new replacement wiring.

Install the New Turn Signal Wiring

Installation of the new turn signal wires involves carefully routing them into position:

Proper installation of the new turn signal wires ensures many more years of reliable operation.

Testing and Finish Reassembly

Once the new turn signal wiring is fully installed, test operation before reassembling:

If the turn signals operate normally, you can go ahead and reinstall the lower dash panel and any other interior trim pieces that were removed. Your 87 Corolla once again has fully functioning turn signals!

Replacing old brittle wiring seems difficult, but carefully following the steps I've outlined makes the job very manageable. Take your time, use the correct tools, and refer to the manual whenever in doubt. Your patience will be rewarded with many more years of reliable service from your vintage Toyota.