The Jeep Wrangler is a classic model that has been manufactured by Jeep since 1986. Its 1987 edition was among the most popular ones, and it still has a considerable following due to its off-road capabilities and rugged design. However, one of the most common issues that Jeep Wrangler owners face is a malfunctioning starter solenoid. In this article, we will discuss the 1987 Jeep Wrangler starter solenoid wiring diagram and provide a comprehensive guide to help you diagnose and fix any problems you may encounter.
What Is a Starter Solenoid?
The starter solenoid is a component that transmits an electrical current from the battery to the starter motor, which then starts the engine. The solenoid acts as a switch that completes the circuit between the battery and the starter when the key is turned. It is located under the hood and is connected to the battery, starter motor, and ignition switch via wiring.
How Does a Starter Solenoid Work?
The solenoid has a plunger that is activated by an electromagnet. When you turn the key, the ignition switch sends a signal to the solenoid, which then activates the plunger. The plunger completes the circuit between the battery and the starter motor, causing the starter motor to turn and start the engine.
If your Jeep Wrangler’s starter solenoid fails, your engine won’t start, and you’ll need to diagnose and fix the problem. In the following sections, we’ll give you a detailed guide on how to do that.
How to Diagnose Starter Solenoid Problems?
Before you can fix your Jeep Wrangler’s starter solenoid wiring, you need to diagnose the problem first. Here are some of the signs that your starter solenoid is malfunctioning:
- Your engine won’t start or cranks slowly.
- You hear a clicking sound when you turn the key.
- Your lights and other electrical components work correctly.
If you’re experiencing any of these symptoms, you’ll need to check the starter solenoid wiring and connections to see if they’re the root of the problem.
Tools You’ll Need
Here are the tools you’ll need to diagnose and fix your starter solenoid:
- A multimeter
- A wrench set
- A screwdriver set
- A wire stripper
Step-by-Step Guide
Here’s how to diagnose and fix your Jeep Wrangler’s starter solenoid problems:
- Turn off the ignition and disconnect the battery.
- Locate the starter solenoid and inspect the wiring and connections. Make sure they’re not corroded or damaged.
- Use a multimeter to test the battery voltage. It should be around 12 volts.
- Connect the multimeter to the solenoid’s positive terminal and the battery’s negative terminal.
- Turn the key, and the multimeter should read 12 volts. If it doesn’t, there might be an issue with the wiring or ignition switch.
- Connect the multimeter to the solenoid’s negative terminal and the engine block. Turn the key, and the multimeter should read zero volts. If it doesn’t, there might be an issue with the ground cable.
- If the wiring and connections are okay, and the multimeter readings are correct, the problem might be with the starter motor or solenoid. In this case, you’ll need to replace them.
1987 Jeep Wrangler Starter Solenoid Wiring Diagram
The 1987 Jeep Wrangler starter solenoid wiring diagram is relatively simple. Here are the components that make up the wiring system:
| Component | Function |
|---|---|
| Battery | Supplies power to the starter solenoid and the rest of the electrical system |
| Ignition Switch | Sends a signal to the starter solenoid to activate the plunger |
| Starter Solenoid | Transmits an electrical current from the battery to the starter motor |
| Starter Motor | Turns the engine when the circuit is completed by the plunger |
To help you understand the wiring system better, here’s a 1987 Jeep Wrangler starter solenoid wiring diagram:
If you need to replace any of these components, make sure to use genuine OEM parts from a reputable supplier. This will ensure that your Jeep Wrangler’s wiring system works correctly and lasts longer.
FAQs
How much does it cost to replace a starter solenoid?
The cost of replacing your Jeep Wrangler’s starter solenoid depends on several factors, such as the make and model, the supplier, and the mechanic. On average, you can expect to pay around $150 to $350 for a new starter solenoid and installation.
Can I replace my starter solenoid myself?
If you’re experienced in DIY car repairs, you can replace your starter solenoid yourself. However, if you’re not confident in your skills, it’s better to seek the help of a professional mechanic. This will ensure that the replacement is done correctly and prevent any further damage to your Jeep Wrangler.
How can I prevent starter solenoid problems?
The best way to prevent starter solenoid problems is to keep your Jeep Wrangler’s wiring system clean and free from corrosion. You should also check the battery and connections regularly and replace any components that show signs of wear and tear. Finally, it’s essential to follow the manufacturer’s recommended maintenance schedule to keep your Jeep Wrangler in top condition.
Can a bad starter solenoid drain the battery?
Yes, a bad starter solenoid can drain the battery. If the solenoid is stuck in the “on” position, it will continue to draw power from the battery, even when the engine is off. This will drain the battery and prevent your Jeep Wrangler from starting.
In conclusion, the 1987 Jeep Wrangler starter solenoid wiring diagram is a crucial component of your Jeep’s wiring system. By understanding how it works and how to diagnose and fix problems, you can keep your Jeep Wrangler running smoothly and reliably for years to come.
