---
product_id: 375776044
title: "Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2)"
brand: "gebildet"
price: "103.27 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Gebildet"
url: https://www.desertcart.tn/products/375776044-gebildet-jd1912-car-relay-harness-12v-40a-4-pin-spst
store_origin: TN
region: Tunisia
---

# 40A high current capacity Built-in diode for voltage protection -55°C to +70°C wide temp range Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2)

**Brand:** gebildet
**Price:** 103.27 DT
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your ride’s electrical game with Gebildet’s pro-grade relay harness!

## Quick Answers

- **What is this?** Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2) by gebildet
- **How much does it cost?** 103.27 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/375776044-gebildet-jd1912-car-relay-harness-12v-40a-4-pin-spst)

## Best For

- gebildet enthusiasts

## Why This Product

- Trusted gebildet brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Simplicity:** Color-labeled wires and socket mount design for effortless installation.
- • **Precision & Durability:** Silver alloy contacts ensure low resistance (≤100MΩ) and 100,000+ electrical cycles.
- • **Smart Protection Inside:** Integrated diode suppresses voltage spikes, safeguarding your electronics.
- • **Built to Brave the Elements:** Operates reliably from freezing -55°C to scorching +70°C.
- • **Power Through with Confidence:** Handles up to 40 Amps seamlessly for your automotive needs.

## Overview

The Gebildet JD1912 Car Relay Harness is a robust 12V 40A 4-pin SPST relay socket set designed for automotive, truck, van, motorcycle, and boat applications. Featuring a built-in diode for voltage spike protection, silver alloy contacts for durability, and a wide operating temperature range (-55°C to +70°C), it guarantees reliable performance and longevity. With easy installation via color-coded wires and socket mounts, this pack of 2 harnesses is a trusted solution for enhancing vehicle electrical systems.

## Description

Interchangeable/Compatible with: All automobiles and devices equipped with a 12 Volt DC power source. Relay technical specification: Relay load: 40A/12VDC Contact Resistance: ≤ 100MΩ Contact Material: Ag Alloy Life Expectancy Electrical: 100,000 Operations (at 30 Operations/min) Life Expectancy Mechanical: 10,000,000 Operations Coil power:1.8W Operate Time: 15ms Release Time: 10ms Initial withstand voltage of Contact and Contact: 1000VAC/1min Initial withstand voltage of Contact and Coil: 1500VAC/1min Insulation Resistance: 100MΩ/( 500VDC) Temperature Range: -55°C ~+70°C Humidity Range:35%-80% Atmospheric Pressure:86-106KPa Gebildet Operation Goal: Create value for our customers is our responsibility, quality products and sincere service is our eternal pursuit. After Sale Service: Customer satisfaction is our greatest pursuit, If you found our products don’t work or not so good quality as you think, Please contact us without hesitation. We can resend you a new item or 100% refund money as you like. Feedback and Review warmly welcome: Your Feedback and Review are the motivation for us to provide best product and service, we really appreciate to hear the suggestion from you.

Review: なかなかいい - 使いやすい
Review: Good quality at an affordible price. - Just what I needed to fix my Calibre's headlights. Passenger headlight quit working because of PCM issues. Ran wires from drivers light to th relays and used the positive from the battery to the passenger headlight through the relay to prevent using too much power on the drivers light. Worked fantastic, lights are good as new now!

## Features

- Integrated Diode: Each relay includes a built-in diode that suppresses induced voltage during switching, safeguarding your electrical components from potential damage.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B078T8CMF6 |
| Best Sellers Rank | #26,029 in Automotive ( See Top 100 in Automotive ) #9 in Automotive Starter Relays |
| Brand | Gebildet |
| Brand Name | Gebildet |
| Coil Resistance | 100 Megaohms |
| Coil Voltage | 12 Volts (DC) |
| Connector Type | Spade |
| Connector type | Spade |
| Contact Current Rating | 40 Amps |
| Contact Material | Silver Alloy |
| Contact Type | Normally Open |
| Contact material | Silver Alloy |
| Contact type | Normally Open |
| Current Rating | 40 Amps |
| Current rating | 40 Amps |
| Customer Reviews | 4.7 out of 5 stars 2,320 Reviews |
| Manufacturer | Gebildet |
| Maximum Switching Current | 40 Amps |
| Minimum Switching Voltage | 8 Volts |
| Model | E079 |
| Mounting Type | Socket Mount |
| Mounting type | Socket Mount |
| Operating Time | 0.02 Seconds |
| Operation Mode | Manual |
| Part Number | E079 |
| UPC | 694090222994 |
| Upper Temperature Rating | 70 Degrees Celsius |
| Wattage | 480 watts |

## Product Details

- **Connector type:** Spade
- **Contact material:** Silver Alloy
- **Contact type:** Normally Open
- **Current rating:** 40 Amps
- **Mounting type:** Socket Mount

## Images

![Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2) - Image 1](https://m.media-amazon.com/images/I/515fFB9a2XL.jpg)

## Questions & Answers

**Q: I received the jd2912 relays. what email address do i email?**
A: You can contact son of wil through Amazon.

**Q: so in the picture the top red wire that is 87 goes to the motor to turn it on but it shows in the picture red turns to black and it is ground?**
A: The red wire goes to the device that you want to turn on and the black to that Device

**Q: what gauge wire on battery terminals**
A: I used a 14 gauge wire to the battery

**Q: I have a positively grounded (+ ground) system.  The relay coil should still operate correct?**
A: If you are stating the chassis is battery plus, then it should work, but would need to cycle your negative signals to control coils. John Deere 60 tractors have a positive chassis methodology, so might need to investigate how they operate to verify implementation.

## Customer Reviews

### ⭐⭐⭐⭐ なかなかいい
*by 青***明 on 10 May 2026*

使いやすい

### ⭐⭐⭐⭐⭐ Good quality at an affordible price.
*by A***R on 13 October 2024*

Just what I needed to fix my Calibre's headlights. Passenger headlight quit working because of PCM issues. Ran wires from drivers light to th relays and used the positive from the battery to the passenger headlight through the relay to prevent using too much power on the drivers light. Worked fantastic, lights are good as new now!

### ⭐⭐⭐⭐⭐ Good quality Relay
*by G***. on 28 June 2023*

I recently acquired the Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-labeled Wires for Automotive Truck, and I must say, it has exceeded my expectations. This well-crafted harness has truly impressed me with its quality construction and user-friendly features, particularly the color-coded wires that greatly simplify the installation process. I utilized the Gebildet JD1912 Car Relay Harness to integrate a new light bar onto my truck, and the results were outstanding. The 40-amp relay provided ample power for my light bar's requirements, ensuring optimal performance. Furthermore, the wires included in the harness are adequately thick to handle the electrical current without risking overheating or any compromise in functionality. The combination of durability and reliable performance instilled a sense of confidence in the harness's ability to handle the demands of my lighting setup. A notable advantage of the Gebildet JD1912 Car Relay Harness is its versatility. This harness is accompanied by a selection of connectors, allowing for a wide range of applications. I was able to seamlessly connect my light bar to various components in my truck, including the battery, fuse box, and switch, thanks to the inclusion of these well-designed connectors. This adaptability adds immense value to the harness, making it a practical and versatile solution for automotive enthusiasts seeking reliable electrical connections. Overall, the Gebildet JD1912 Car Relay Harness stands as a remarkable product. Its superior construction and thoughtful design ensure a seamless installation process, even for individuals with limited technical expertise. The convenience of color-coded wires greatly simplifies the setup, reducing the likelihood of errors or confusion during installation. The reliability of the harness, combined with its compatibility with a variety of applications, demonstrates its worth as a top-quality product in the market. While the Gebildet JD1912 Car Relay Harness boasts several strengths, it is important to consider some potential drawbacks. One aspect to keep in mind is the relatively higher price point compared to some alternative brands. However, this price difference can be justified by the harness's superior quality and reliable performance. Additionally, it may be slightly less readily available than more widely recognized brands, although it is certainly worth the effort to seek out this exceptional product. Taking into account the advantages and potential limitations, it is evident that the Gebildet JD1912 Car Relay Harness is a commendable choice. Its durable construction, user-friendly features, and adaptability make it a standout product in the realm of car relay harnesses. I wholeheartedly recommend this harness to anyone in search of a reliable and convenient solution for their automotive electrical needs.

## Frequently Bought Together

- Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST 12AWG Harness Sockets with Color-Labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2)
- 6 Pack Inline Fuse Holder 12V, Upgraded 12 AWG Waterproof Fuse Holder with 66 Pcs Standard Car Fuses (2A/3A/5A/7.5A/10A/15A/20A/25A/30A/35A/40A), YNZDRWA in Line Fuses Holders 12v for Marine Auto
- VIABRICO 12Gauge 100FT Electrical Wire Cable 2 Conductors Red Black Cable Hookup LED Lighting Strips Flexible Wire Extension Cord 12AWG Copper Clad Aluminum Copper Wire 12V/24V DC -30.5M

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.tn/products/375776044-gebildet-jd1912-car-relay-harness-12v-40a-4-pin-spst](https://www.desertcart.tn/products/375776044-gebildet-jd1912-car-relay-harness-12v-40a-4-pin-spst)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-15*