---
product_id: 36964846
title: "True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars"
brand: "online led store"
price: "€ 13.24"
currency: EUR
in_stock: true
reviews_count: 8
category: "Online Led Store"
url: https://www.desertcart.ie/products/36964846-true-mods-1-pack-5-pin-12v-bosch-style-waterproof
store_origin: IE
region: Ireland
---

# 40A high switching capacity Waterproof design Heavy-duty 12 AWG wiring True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars

**Brand:** online led store
**Price:** € 13.24
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your ride with waterproof precision!

## Quick Answers

- **What is this?** True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars by online led store
- **How much does it cost?** € 13.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/36964846-true-mods-1-pack-5-pin-12v-bosch-style-waterproof)

## Best For

- online led store enthusiasts

## Why This Product

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

## Key Features

- • **Dual Mode Control:** Run auxiliary lights or fans manually or automatically synced with factory systems—flexibility that fits your lifestyle.
- • **Power That Performs:** Handles up to 40 amps with silver-plated copper contacts ensuring reliable, high-current switching every time.
- • **Plug & Play Precision:** 5-pin SPDT configuration with clearly color-coded 12 AWG wires for seamless installation and versatile control.
- • **Built to Brave the Elements:** Waterproof Bosch-style relay with ribbed gasket for ultimate durability in marine and automotive environments.
- • **Trusted by Pros & Enthusiasts:** Top-rated with 4.7 stars from 1,484 users, proven long-term reliability in demanding conditions.

## Overview

The True MODS 5-Pin 12V Bosch Style Waterproof Relay Kit features a rugged waterproof design, heavy-duty 12 AWG hot wires, and a 40 amp SPDT relay ideal for automotive and marine applications. With silver-plated copper contacts and a versatile 5-pin harness, it delivers reliable high-current switching for auxiliary lighting, fans, and more. Trusted by thousands, this relay kit ensures durable, professional-grade performance in any environment.

## Description

Buy True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars: Starter - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good Quality, Heavy Duty. - This is a really nice heavy duty relay. I put it in my 2017 Superduty to run my auxiliary backup lights with my upfitter switches. With this relay installed I can run the auxiliary backup lights in two modes, ON when ever I want (even with the truck OFF) or make them go ON and OFF with the factory back up lights. Works great and I didn’t have to use a diode. My configuration uses two of the upfitter switches in the truck. The mounting bracket worked out nice. This relay is water proof as well, has a nice ribbed torturous path gasket. 7/16/20 Update: Two years now and still working, no issues. Thumbs up! 7/25/2023 Still going strong! 05/21/24 still working!!! I bought two of these on my original purchase, one as a spare because that’s what I do. The spare is still sitting on the shelf in my basement.
Review: Great Product - Great Product and fast shipping. Thank you!

## Features

- User Manual available for download under Product Information Details
- Waterproof construction & heavy duty 12AWG wires for the main contact.
- Bosch style 5-Pin SPDT (Single Pole Double Throw) Relay.
- 12VDC (14V Max) and 40A/30A High Switching Capability.
- Wire Specifications: Black - Ground (85), Red - VDC (30), White - Trigger (86), Yellow - Output N/C (87a), and Blue - Output N/O (87).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01N66W2XF |
| Best Sellers Rank | #17,382 in Automotive ( See Top 100 in Automotive ) #7 in Automotive Replacement Starter Relays |
| Brand | ONLINE LED STORE |
| Brand Name | ONLINE LED STORE |
| Coil Voltage | 12 Volts |
| Connector Type | Solder |
| Contact Current Rating | 40 Amps |
| Contact Material | Silver Plated Copper |
| Contact Type | Normally Closed |
| Current Rating | 40 Amps |
| Customer Reviews | 4.7 out of 5 stars 1,484 Reviews |
| Item Weight | 3.84 ounces |
| Manufacturer | ONLINE LED STORE |
| Maximum Switching Current | 40 Amps |
| Minimum Switching Voltage | 10 Volts (DC) |
| Mounting Type | Surface Mount |
| Operation Mode | Auto,Manual |
| UPC | 816165023866 |
| Wattage | 14.4 watts |

## Product Details

- **Connector Type:** Solder
- **Contact Material:** Silver Plated Copper
- **Contact Type:** Normally Closed
- **Current Rating:** 40 Amps
- **Mounting Type:** Surface Mount

## Images

![True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars - Image 1](https://m.media-amazon.com/images/I/81m2P8Wl3RL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: How many amps does it take to make the relay switch from open to closed??  I have a 1.5 amp circuit that I want to use as the switch power**
A: The relay only requires about 150 milliamps @ 12 V DC to be triggered.  Hope this helps.

**Q: I am wanting to put in an on/off switch on a 4wheeler to the existing 12v dc auxilary jack.  what wires would to to what posts on the 3 prong switch?**
A: It would be better to run a new fused feed from the battery and use the accessory wire from the key switch so you always shut it off and not forget and run your battery dead.

**Q: Im noticing a constant buzz from my relays. What could be the issue? Bad switch? Bad ground? too much voltage drop?**
A: Are all the relays that are buzzing connected to the same trigger switch?  If so, the trigger switch may be supplying power (or ground) to the relays even when in the "off" position.  This is only one possibility.  The relay itself may be faulty, just the likelihood of multiple units failing at the same time is slim.  Please contact us directly to further troubleshoot the matter.  Thanks.

**Q: I am hooking up a amp to a mototcycle, the instruction says i need to use this. Why?**
A: HOW MANY AMPS DOES YOUR AMPLIFIER DRAW.....  IT MAY NEED ITS OWN CIRCUT BREAKER FED THUR THIS RELAY, BE CAREFULLY YOU DONT BURN THINGS UP, USE THE RIGHT SIZE WIRING AND PROTECT WITH THE RIGHT SIZE FUSE

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good Quality, Heavy Duty.
*by K***N on April 21, 2018*

This is a really nice heavy duty relay. I put it in my 2017 Superduty to run my auxiliary backup lights with my upfitter switches. With this relay installed I can run the auxiliary backup lights in two modes, ON when ever I want (even with the truck OFF) or make them go ON and OFF with the factory back up lights. Works great and I didn’t have to use a diode. My configuration uses two of the upfitter switches in the truck. The mounting bracket worked out nice. This relay is water proof as well, has a nice ribbed torturous path gasket. 7/16/20 Update: Two years now and still working, no issues. Thumbs up! 7/25/2023 Still going strong! 05/21/24 still working!!! I bought two of these on my original purchase, one as a spare because that’s what I do. The spare is still sitting on the shelf in my basement.

### ⭐⭐⭐⭐⭐ Great Product
*by J***N on August 29, 2025*

Great Product and fast shipping. Thank you!

### ⭐⭐⭐⭐⭐ Bosch flasher relay replacement
*by M***K on September 2, 2025*

Plug and play replacement for original bosch relays. Work great.

## Frequently Bought Together

- True MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars
- 12 AWG Inline Fuse Holder - 12 Gauge Fuse Holder for 30A Blade Fuse (6 Pack)
- 10 Gauge Fuse Holder - 10 AWG Inline Fuse Holder with 40 AMP ATC Blade Fuses (4pack)

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**Shop now:** [https://www.desertcart.ie/products/36964846-true-mods-1-pack-5-pin-12v-bosch-style-waterproof](https://www.desertcart.ie/products/36964846-true-mods-1-pack-5-pin-12v-bosch-style-waterproof)

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-04*