How to Replace the Turn Signal Wiring on a 1987 Yugo

Introduction

Replacing the turn signal wiring on your 1987 Yugo can be a straightforward process if you have the right tools and take the proper precautions. In this article, I will walk you through the complete process step-by-step.

The turn signals are an important safety feature on your vehicle. If the wiring is damaged or corroded, the signals may blink rapidly or not work at all. Replacing the wiring will restore proper functioning and ensure other drivers can see your turning intentions.

While this guide is specific to the 1987 Yugo, the general process will be similar for other vehicles. I will cover precautions to take, tools needed, how to remove the old wiring, installing the new wiring, testing the signals, and tips for troubleshooting.

Let's get started!

Safety Precautions

When working on any vehicle electrical system, be sure to take safety seriously. Here are some important precautions:

• Disconnect the battery. Locate the battery and disconnect the negative terminal. This will prevent electrical shorts or shocks while working.

• Protect your eyes. Wear safety glasses when working under the dashboard. Debris or old wiring can fall into your eyes.

• Avoid distractions. Focus solely on the wiring project until complete. Do not work when tired or rushed.

• Review wiring diagrams. Consult the Yugo service manual to understand the turn signal circuit before beginning.

• Use proper tools. Only use pliers, wire strippers, crimpers, etc. specifically designed for automotive electrical work.

• Take precautions if splicing. Carefully wrap any splices in electrical tape and avoid loose wire connections.

Gather the Proper Tools

To complete this wiring project, you will need:

• Wire strippers - For removing insulation from new wiring

• Crimp connectors - To securely fasten wires together

• Electrical tape - For wrapping connections

• Voltmeter - For testing circuit continuity

• Pin removal tool - For releasing wiring connector pins

• Flashlight - For seeing under dashboard

• Gloves - For protection from sharp edges

• Safety glasses - For eye protection

• Small zip ties - For bundling the new wiring

• Yugo service manual - For wiring diagrams and specs

Tip: Purchase a dedicated automotive wiring kit with connectors and tools designed for this type of project.

Removing the Old Wiring

With your tools gathered and battery disconnected, you're ready to begin removing the old turn signal wiring:

Step 1: Gain Access to the Wiring

• Use a flashlight to locate the turn signal wiring under the dashboard. It will run from the steering column out to the fuse box.

• You may need to remove lower dash panels to access the full wiring harness. Remove any screws or bolts securing panels. Avoid breaking fragile plastic clips.

Step 2: Detach from Light Sockets

• Locate the wire connectors at the front and rear turn signal light sockets.

• Use the pin removal tool to detach the connector from the socket. Make note of wire colors and placement.

Step 3: Detach Wiring From Switch and Fuse Box

• Under the steering column, locate the connector to the turn signal switch. Detach the wiring.

• At the fuse box, locate the turn signal fuse positions. Remove the old wires from their terminals.

• You can snip the old wires to fully remove them, we will not be reusing them.

Installing the New Turn Signal Wiring

With the old wiring removed, let's install the replacement:

Step 1: Route New Wiring

• Begin routing the new wiring harness through the same path as the old wires.

• Refer to the Yugo's wiring diagram for guidance.

• TIP: Use small zip ties to bundle the new wiring neatly together.

Step 2: Connect Turn Signal Switch

• Locate the new wiring connector for the turn signal switch.

• Attach it to the switch terminals under the steering column.

• CAUTION: Make sure you observe the correct wire placement referenced in the service manual.

Step 3: Connect Front and Rear Light Sockets

• Locate the connectors for the front and rear turn signals.

• Insert the correct new wires into their corresponding sockets.

• Again, follow the wire colors and placement found on the old wiring.

Step 4: Connect Fuse Box

• Finally, attach the new wiring to the appropriate terminals in the fuse box.

• These will match the terminals the old wires were removed from.

• Replace any fuses that were removed.

Testing the New Wiring

Before reassembling the dashboard, test the turn signals:

• Reconnect the car battery.

• Turn the ignition to the "accessory" position, but do not start the engine.

• Activate the left and right turn signals.

• Walk around the car and inspect that the proper lights flash correctly.

• Also check the turn signal indicator lights on the dashboard.

• If the lights do not flash, recheck the wiring connections and any splices.

Finishing Touches

If the turn signals are functioning properly, you're ready to button up:

• Neatly bundle any excess wiring with zip ties and secure it under the dashboard.

• Double check no wires will be pinched or snagged when reinstalling dash panels.

• Reinstall any dash panels removed during the process.

• Reconnect the car battery.

• Test the signals again with the engine running to ensure proper operation.

Troubleshooting Tips

If your newly installed turn signals still do not function, here are some troubleshooting tips:

• Check for power at the fuse box. Use a voltmeter to make sure power is reaching the terminals.

• Inspect for loose connections. Wiggle wiring connections and splices to check for loose fit.

• Look for bare or shorted wires. Damage to the wire insulation can cause malfunctions.

• Replace the flasher unit. The thermal flasher is located under the dash and can wear out over time.

• Consult the wiring diagram. Use it as a reference to methodically check each connection point.

• Check the bulb sockets. Make sure replacement bulbs are properly installed and functioning.

With patience and by methodically testing each component, you can isolate and correct any issues in the new turn signal wiring on your 1987 Yugo. Just take it slow and follow safety precautions.

Conclusion

While it takes some time and effort, installing new turn signal wiring in your 1987 Yugo is definitely a DIY project for owners willing to learn. Following the steps I outlined for safely removing the old wiring, routing and connecting the new harness, testing the system, and troubleshooting any issues will get your turn signals flashing properly again. Just have patience, use the right tools, and refer to the Yugo's wiring diagrams anytime you get stuck. Soon you'll have safe and operational turn signals once again.