DGP301 Glow Plug Tester provides fault detection through LED's for a quick analysis of short circuit overcurrent normal operation and open circuit/undercurrent. It allows for testing without removing the glow plug from engine and powers the glow plug to test the plugin its operating state. Much more accurate test than a cold resistance tester which can miss short circuits.


Designed To Work On 12V ONLY!

Disconnect the busbar or leads from the glow plugs to be tested;

Connect the RED battery clamp to the positive terminal of the battery, and the BLACK battery clamp to the negative terminal of the battery;

Push the contact plate in the end of the test probe onto the glow plug;

Terminate until the glow plug has warmed up. This might take between 3 and 20 seconds (Check manufacturers specs for exact warm-up time)

Check which LED is illuminated on the control panel; 

Short Circuit---Defective glow plug

>16A---Defective glow plug (more than 3 seconds)

<7A---Defective glow plug (high resistance )

Open Circuit---Defective glow plug

Low Battery---Check source battery volts

NOTE: Even when all 4 glow plugs are open circuit, DO NOT assume this tool is faulty. The vehicle might be still started up with all 4 glow plugs being defective. 


Kit Includes:

DGP301 Main Unit

Test Probe

Battery Clippers

We Also Recommend

ICarsoft CR Pro – Powerful 2019 Diagnostic Tool All Makes

iCarsoft CR Pro - Universal Professional Diagnostic Tool 2021

Sale price £210.00 Regular price £246.00 Save £36.00
Carista OBD2 app-powered adapter

Carista adapter

Regular price £24.99
ICarsoft LR V2.0 – Professional Diagnostic Tool For Land Rover & Jaguar

iCarsoft LR V2.0 - Land Rover & Jaguar Professional Diagnostic Tool

Sale price £126.00 Regular price £149.00 Save £23.00
ICarsoft MB V2.0 – Professional Diagnostic Tool For Mercedes

iCarsoft MB V2.0 - Mercedes, Sprinter & Smart Professional Diagnostic Tool

Sale price £126.00 Regular price £149.00 Save £23.00
ICarsoft CR V2.0 – Professional Diagnostic For 10 Optional Manufacturer

iCarsoft CR V2.0 - Professional Diagnostic Tool - 10 Optional Manufactures

Sale price £154.00 Regular price £179.00 Save £25.00

Net Orders Checkout

Item Price Qty Total
Subtotal £0.00

Shipping Address

Shipping Methods