Automotive Relay Tester, 12V Electronic Automotive Relay Tester Auto Car Diagnostic Battery Checker Tool

Two identical-looking relays sitting side by side in the fuse box, and the usual trick is to swap one for the other and see whether the fault moves. That only proves anything while the fault is actually present, which is rarely the case with an intermittent one. Testing the suspect unit on its own takes the guesswork out.

Ending the swap-and-see routine

Power the relay through this tool and it watches how the thing behaves across the test: contact data, closing time, and the inertia between the coil pulling in and the contacts finally settling. One indicator carries the result. A green LED marks a relay operating as it should, a red LED marks one that is not. That replaces listening for a click, which confirms the coil moved and says nothing about whether the contacts made properly.

Conditions the reading depends on

Two requirements are set out and both change the answer. The battery has to be a 12 V unit sitting between 11 and 15 V, since a flat one will make a healthy relay look defective. Coil resistance should preferably be greater than 20 ohms. Neither is unusual for common automotive relays, but a reading taken outside those bounds is not worth acting on.

Key features

• Pass or fail at a glance: a colour, not a number to compare against a specification sheet.
• Follows the whole operation: contact data, closing time and inertia across each stage of the test.
• Uses 12 V vehicle power: the car's own battery drives the test, within the stated voltage bounds.
• Made for quick checks: intended as a fast way to establish the condition of an automotive relay.

Specifications

• Voltage: 12 V
• Battery requirement: 12 V battery, 11-15 V
• Coil resistance: preferably greater than 20 ohms
• Dimensions, weight and materials: these figures never appear in the supplier information
• Pack contents: no breakdown is given in the listing
• Relay types supported: unspecified in the source material

Read this before ordering

• The title refers to a battery checker. The description covers relay testing alone and sets out no battery-testing function, so do not buy it on that basis.
• A relay showing green has passed the sequence this tool runs. It is not proof the contacts will hold up carrying current in service.
• No relay families, pin arrangements or contact ratings are named anywhere. Compare against the relay you intend to check.

Worth keeping with the fuse puller for the next time something electrical only misbehaves when it is warm.

Returns, Refunds and Replacements

Products that are received faulty, damaged, or not as described are eligible for a return, refund, or replacement in accordance with the Australian Consumer Law (ACL). We are committed to ensuring all products meet the standards of quality and reliability expected by our customers. However, please note that we do not accept returns or provide refunds for change of mind. We encourage you to carefully consider your purchase to ensure it meets your needs and expectations.

Delivery Timeframe

Please note that we cannot guarantee the exact date of arrival, and the delivery timeframes (excluding weekends and public holidays) are as follows:

• For customers in Victoria, approximately 7-10 working days;
• For customers in NSW, SA, ACT, and QLD, approximately 9-12 working days;
• For customers in WA, NT, and TAS, approximately 9-12 working days.