---
product_id: 12860273
title: "ESI 193 Black 2.5\" x 5\" 12/24V Diagnostic Relay Buddy Pro Test Kit"
brand: "relay buddy"
price: "$459.64"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.ec/products/12860273-esi-193-black-2-5-x-5-12-24v-diagnostic
store_origin: EC
region: Ecuador
---

# Good/Bad Indicator 12/24V Testing 5 Relay Types ESI 193 Black 2.5" x 5" 12/24V Diagnostic Relay Buddy Pro Test Kit

**Brand:** relay buddy
**Price:** $459.64
**Availability:** ✅ In Stock

## Summary

> 🔧 Unlock the Secrets of Your Relays!

## Quick Answers

- **What is this?** ESI 193 Black 2.5" x 5" 12/24V Diagnostic Relay Buddy Pro Test Kit by relay buddy
- **How much does it cost?** $459.64 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/12860273-esi-193-black-2-5-x-5-12-24v-diagnostic)

## Best For

- relay buddy enthusiasts

## Why This Product

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

## Key Features

- • **🧳 Portable Design:** Includes 5 relay adapters and a blow mold case for organized storage and transport.
- • **✅ Clear Indications:** Green light for PASS, red light for FAIL, plus flashing trouble codes for easy interpretation.
- • **🔒 Certified Quality:** Frustration-free certified, ensuring reliability and ease of use.
- • **🚀 Quick Diagnostics:** Off-the-car relay testing for swift troubleshooting and minimal downtime.
- • **🔧 Comprehensive Testing:** Effortlessly tests 5 different relay types for both 12V and 24V systems.

## Overview

The ESI 193 Black 2.5" x 5" 12/24V Diagnostic Relay Buddy Pro Test Kit is a professional-grade tool designed to test five different relay types in both 12V and 24V systems. It features quick off-the-car testing capabilities, clear PASS/FAIL indicators, and comes with a convenient carrying case, making it an essential addition to any automotive toolkit.

## Description

ESI 193 Black 2.5" x 5" 12/24V Diagnostic Relay Buddy Pro Test Kit

## Features

- Tests 5 different relays, both 12V and 24V
- 3 diagnostic trouble codes help define the cause of the bad relay
- #193 Kit Includes 5 Relay Adapters and blow mold case
- Quick off-the-car relay tester - checks relay coil & switch contacts
- Fails bad relays - Good/Bad indication, green light for PASS, red light for FAIL with flashing trouble code

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Relay Buddy |
| Power Source | Powered By Vehicle's 12v Battery |
| Style | Diagnostic tool |
| Color | Black |
| Item Weight | 0.4 Kilograms |
| Item dimensions L x W x H | 3.94 x 2.76 x 1.57 inches |
| Min. Operating Voltage | 12 Volts |
| Specification Met | certified frustration-free |
| UPC | 855174001991 |
| Manufacturer | ESI |
| Global Trade Identification Number | 00855174001991 |
| Model | 193 |
| Item Weight | 14.1 ounces |
| Product Dimensions | 3.94 x 2.76 x 1.57 inches |
| Item model number | 193 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 193 |
| Voltage | 24 Volts |

## Product Details

- **Brand:** Relay Buddy
- **Power Source:** Powered By Vehicle's 12v Battery
- **Style:** Diagnostic tool
- **Color:** Black
- **Item Weight:** 0.4 Kilograms

## Images

![ESI 193 Black 2.5" x 5" 12/24V Diagnostic Relay Buddy Pro Test Kit - Image 1](https://m.media-amazon.com/images/I/91dxsJhTHXL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good tester
*by A***W on April 7, 2025*

Easy to use. Durable build quality, works well on different voltage. Great tester

### ⭐⭐⭐⭐⭐ Works on 2007 Honda Odyssey AC Relay
*by S***N on May 15, 2022*

I had the dreaded intermittent AC failure on my 2007 Honda Odyssey. I've also had a long term parasitic draw that could be related that I have been unable to track down. I took it to the mechanic; the system was low on charge with a leak at the Schrader valves.Valves replaced, system charged, and the compressor would still not stay on. I came in as the mechanic (very good and honest guy) was scratching his head and diagnosing the wiring to the compressor and asked, "do you think it could be the relay?" He swapped the relay to the compressor with a jumper and the compressor kicked right on. He swapped a known good relay in and the problem was solved.I bought the ES 193 so that I can save time and effort by quickly checking the relay myself in the future. Is it cheap, no, but neither is AC diagnosis and repair. Is it quick and easy to check myself (I'm handy and can lookup how to bench test a relay, but I want easy right now), absolutely yes. I checked all the remaining relays (five in total) in about 3 minutes; they all passed (the suspect one failed but it does have a small hole in the side from me pulling it out with a pair of hose pliers to replace it with a new relay after we had already diagnosed it as probably bad).

### ⭐⭐⭐⭐⭐ Add it to your tool box
*by N***N on June 11, 2025*

Nice kit, great for diagnostics.

## Frequently Bought Together

- ESI 193 Black 2.5" x 5" 12/24V Diagnostic Relay Buddy Pro Test Kit
- 190-8 Maxi Relay Adapter
- Lisle 46950 Relay Puller Pliers

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-10*