---
product_id: 381760555
title: "ONLINE LED STORE 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: "€ 26.68"
currency: EUR
in_stock: false
reviews_count: 5
category: "Online Led"
url: https://www.desertcart.pt/products/381760555-online-led-store-true-mods-1-pack-5-pin-12v
store_origin: PT
region: Portugal
---

# 40A/30A high current rating Waterproof design 12 AWG heavy-duty wiring ONLINE LED STORE 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:** € 26.68
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Stay powered, stay protected — the relay that never quits!

## Quick Answers

- **What is this?** ONLINE LED STORE 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?** € 26.68 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/381760555-online-led-store-true-mods-1-pack-5-pin-12v)

## 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

- • **Power That Keeps Up:** Handles up to 40 amps with ease, perfect for high-demand automotive and marine applications.
- • **Plug & Play Simplicity:** Includes a harness socket with color-coded 12 AWG wires for quick, hassle-free installation.
- • **Versatile Control Modes:** SPDT 5-pin design lets you switch loads on/off manually or automatically with factory signals.
- • **Engineered for Longevity:** Heavy-duty construction with metal mounting tab and rugged gasket for years of trouble-free use.
- • **Built to Brave the Elements:** Waterproof Bosch-style relay ensures reliable performance in wet, muddy, or marine environments.

## Overview

The ONLINE LED STORE TRUE MODS 5-Pin 12V Bosch Style Waterproof Relay Kit is a rugged, high-performance automotive and marine relay designed for harsh conditions. Featuring a waterproof housing, heavy-duty 12 AWG wiring, and a 40A/30A SPDT switching capability, it delivers reliable power control for off-road vehicles, boats, and cars. The included harness socket and metal mounting tab simplify installation, making it a trusted choice for professionals and enthusiasts who demand durability and versatility.

## Description

Waterproof 14V DC 5-pin Bosch Style SPDT 12V DC 40A/30A relay is perfect for off road vehicles, boats, or any automobile operating in wet or muddy conditions._The OLS PSZACCEPS178R 5-pin Bosch Style SPDT 12V DC 40A/30A waterproof automotive relay is the ideal electrical relay to be used on off-road vehicles, boats, and dirt track cars that are often exposed to wet or muddy conditions. The purchase includes the relay itself and a relay socket/harness with wires. Metal mounting tab is present on the relay for ease of installation._Basic_Brand:_ONLINE LED STORE_MPN:_EPS177R_UPC:_816165023866

Review: 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: good quality product saves a fortune using this with transistor and some wire. Cheap fix bi passing startup air mix removed all warning lights and got truck out of limp mode.Youtube is a lifesaver!

## 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 | #148,752 in Automotive ( See Top 100 in Automotive ) #36 in Automotive Starter Relays |
| Item model number | SUVELAM |
| Manufacturer | ONLINE LED STORE |
| Product Dimensions | 10.46 x 6.02 x 6.02 cm; 108.86 g |

## Product Details

- **Connector type:** Solder
- **Contact material:** Silver Tin Oxide
- **Contact type:** Normally Open
- **Current rating:** 40 Amps
- **Mounting type:** Surface Mount

## Images

![ONLINE LED STORE 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/314YvPS2a4L.jpg)
![ONLINE LED STORE 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 2](https://m.media-amazon.com/images/I/41jGJkrSVVL.jpg)
![ONLINE LED STORE 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 3](https://m.media-amazon.com/images/I/41jQc3ljUmL.jpg)
![ONLINE LED STORE 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 4](https://m.media-amazon.com/images/I/41kuW9VnZxL.jpg)
![ONLINE LED STORE 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 5](https://m.media-amazon.com/images/I/511u2ksr+PL.jpg)

## 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

### ⭐⭐⭐⭐⭐ Review
*by K***N on 21 April 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.

### ⭐⭐⭐⭐⭐ Review
*by P***T on 27 November 2024*

good quality product saves a fortune using this with transistor and some wire. Cheap fix bi passing startup air mix removed all warning lights and got truck out of limp mode.Youtube is a lifesaver!

### ⭐⭐⭐⭐⭐ Review
*by J***N on 29 August 2025*

Great Product and fast shipping. Thank you!

## 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)

---

## 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.pt/products/381760555-online-led-store-true-mods-1-pack-5-pin-12v](https://www.desertcart.pt/products/381760555-online-led-store-true-mods-1-pack-5-pin-12v)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-04*