Troubleshooting Electrical Woes How to Test Car Relays for Peak Performance

This guide will give you a stepwise process for testing automotive relays. So, let's kick things into gear! Use a multimeter to check for continuity between the relay's control terminals (usually labeled "85" and "86") when the coil is energized. A ... Relay Coil testing is done across terminals #85 and #86 or terminals #1 and #2 depending on the relay numbering. ... Service Tip: If the relay is ... With the relay in the configuration that has the 2 load pins connected, place the test voltage on 1 of the load pins of the relay and an automotive test light ... Use a 12 V supply (can be the 12 V from your car) with about 200 Ω in series. Briefly connect this to the relay coil in each direction and ... Bench Testing: Bench testing involves removing the relay from the vehicle and applying electrical power to its terminals manually. This method ... Relay Buddy is a quick go / no-go tester for the most common automotive relays. It provides you with an indication of the general health and functioning of ... Use a circuit tester to check whether current is reaching the relay. Clip one wire to earth on an unpainted part of the car and probe the feed terminal on the ... H3: Step 4 – Test the Coil To check the relay's coil, set your multimeter to the resistance (ohms) mode. Connect the positive probe to pin 85 and the negative ... Testing the Relay with a Test Light. Connect the test light's clip to the positive terminal of the battery and probe the control terminals of the relay.