How to connect the three-pin horn relay
In automobile circuit modification or repair, relays are commonly used electronic components, especially three-pin horn relays, which can effectively protect the original car circuit and improve the working efficiency of the horn. This article will introduce in detail the wiring method of the three-pin horn relay, and attach the hot topics and hot content on the entire network in the past 10 days to help readers better understand the application scenarios of the relay.
1. The function of three-pin horn relay
The three-pin horn relay is mainly used to control the switch of high-current loads (such as car horns). It controls large currents through small currents to avoid overheating or damage to the circuit caused by direct use of the original car switch. Its core function is to extend the life of the original vehicle circuit and improve safety.
2. Wiring steps for three-pin horn relay
The following is the wiring method of the three-pin horn relay:
| Pin name | Function description | Wiring method |
|---|---|---|
| Pin No. 85 | Negative pole of control terminal | Connect the negative pole or ground of the original car horn switch |
| Pin 86 | Control terminal positive | Connect the positive terminal of the original car horn switch |
| Pin 87 | Load end output | Connect the positive terminal of the speaker |
Specific wiring process:
1. Connect pin 85 to the negative pole of the original car horn switch or directly ground it.
2. Connect pin 86 to the positive pole of the original car horn switch.
3. Connect pin 87 to the positive pole of the speaker, and connect the negative pole of the speaker to the ground directly.
4. Check whether the circuit is secure and test whether the speaker is working properly.
3. Precautions
1. Be sure to disconnect the power supply before wiring to avoid short circuit.
2. Make sure the relay specifications match the speaker power.
3. Use insulating tape to wrap exposed wire ends to prevent short circuits.
4. Hot topics and content on the entire network in the past 10 days
The following are hot topics that have attracted much attention across the Internet recently for readers’ reference:
| hot topics | heat index | Main discussion content |
|---|---|---|
| New energy vehicle battery technology breakthrough | ★★★★★ | Solid-state battery mass production progress and battery life improvement |
| Intelligent driving assistance system upgrade | ★★★★☆ | L3 level autonomous driving regulations implemented |
| The rise of car modification culture | ★★★☆☆ | Young car owners are keen on personalized circuit modifications |
| Car Audio System Review | ★★★☆☆ | High-end speaker and relay matching solution |
5. Summary
The wiring of the three-pin horn relay is not complicated, but you need to strictly follow the pin definitions and pay attention to safety regulations. Combined with the current hot topics of automobile modification and new energy technology, relays will be more widely used in automobile circuits. I hope this article can help readers successfully complete wiring and understand industry trends.
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