If pump doesn't run, change it. If you have no idea what voltage your coil is - start with say 3 volts - and increase it until the relay energizes. Now start the second part of the test. The Other Pole Has: Pin's 8 & 6 as Normally Open Pin's 8 & 5 as Normally Closed. Refer to your owner's manual for relay locations. The Fastest Way to Test a Fuel Pump Relay or Other Automotive Relays. De-energize (remove B+) the control circuit at pin 1; the test light at pin … To further illustrate how a relay works, let's look at it as it functions within an electrical circuit. You'll probably find that most relays will work satisfactorily with a range of supply voltages. Step 2. TEST 1: Making Sure That Terminal No. If all the above tests are positive we can conclude that the relay is healthy. Probe the main wire leading from the relay with the test light. Use Relay Logic to control lights using relays in standard applications as well as 3 … If it does run, proceed as I mentioned above to see if the relay is suppling battery power when the contacts close. The test light will be on. For example - the standard 12v G2E will work from about 8 Volts - up to about 14 Volts. The LED is off there. The relay will not work without it. Place the meter's test wires across the power and control terminals. Keep the multimeter in continuity test mode and check the continuity between common pin and other then coil pin. Relay works on the principle of electromagnetic induction. As a final test, measure the resistance of the relay coil using a multimeter and check whether it is matching to the value stated by the manufacturer. In this step we will identify common and Normally Closed (NC) pin of relay. See my Switch Terminology Page for more on contact arrangements if you need to. In order to know how to connect a DPDT relay, you must know what each pin terminal represents and how the relay works. If an open circuit, change the pump. Energize the relay (control side) by supplying B+ to pin 1 and a ground to pin 3. 8 pin relay pin configuration. Find the "s" and "m" plug-type terminals and the "L" slip-on terminal. Terminal Pins. It shows the components of the circuit as simplified shapes, as well as the power and also signal connections in between the gadgets. Turn the ignition switch to the "On" position, but do not crank the engine. Page 1 of 4: Symptoms Of A Bad PGM-FI Main Relay. Step 4 - Test the Relay. So if you want the relay to open at a HIGH level, you need to connect the middle and left pins to the circuit. You can go to the manufacturer's site and get the drawing for the relay, or just wait until it arrives - there is a pin diagram on the case. 1996, 1997, 1998 1.6L Honda Civic And Civic Del Sol. Step 5 – Testing the Fuel Pump Relay. The central pole is hinged or pivoted in such a way that when the relay coil is powered with voltage, the central pole joins with one of the side terminals of the device called the N/O contact (Normally Closed). With the coil still energized, jump battery positive to one switch terminal. Turn your multimeter on and set it to the ohms setting. Touch the power supply's hot lead to the input pin. Potter Brumfield Relay Wiring Diagram - Collections Of Potter Brumfield Relay Wiring Diagram Collection. Step 4. The main usage of the Relay was seen in the history of transmitting and receiving the information, that was called as Morse code where the input signals used to be either 1 or 0, these change in signals were mechanically noted in terms of ON and OFF of a light bulb or a beep sound, it means those pulses of 1s and 0s are converted as mechanical ON and OFF using electromagnets. Once you locate the relay, you have three methods to test it. You'll be able to find out if the fuel pump relay, or the fuel pump Inertia Switch, or the fuel pump is the cause of the No Start Condition on your Ford car or pickup. You can see the design and various parts of the relay. In this article, we go over how to connect a Double Pole Double Throw (DPDT) relay in a circuit. Helpful Information. Relay Logic provides you with a guide for using NCD relay controllers, and how they can be wired for many types of applications. Use Relay Logic to control the forward or reverse direction of motors. A relay (this post is covering a 12v 8 Channel Relay) An external 12v power supply. Parts of the Relay. How To Test A Relay With A Multimeter. Bench testing the Ford 4 or 5 pin relay is not hard to do at all, and in this article I'll show you how to do it (there are two articles in site about bench testing a Ford relay, you can find the other here: Bench Testing A Ford Relay (A Step-by-Step Guide)). 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