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So, The ground circuit within the automatic shutdown (ASD) relay, is controlled by the powertrain control module (PCM). Connect one end of another jumper wire (16 gauge or smaller) to the power side of the 12-volt power source. JavaScript is disabled. So, It is important to have the vehicle scanned for trouble codes; to determine what the exact cause of the problem is. Check the voltage source. Special thanks to: “Thank you, for the info, on your site, on how to remove valve springs, and install stem seals, using normal shop tools. "https://ssl." […], A Compression test is a good way to measure the condition of the rings, cylinders, and valves. Depending on the circuit it controls; the relay may be located under the dashboard or inside the engine compartment in a junction block. If your engine is running rough or is lacking power; consider doing a compression test. My shutoff solenoid went out on my 12v and instead of letting dodge rape me i went to tractor supply and got a throttle cable for a tiller or tractor and ran it thru firewall and attached to fuel shut off arm. In fact you should be using appropriately sized wire for all of this. Want to know more about your particular Make and Model vehicle? Replace the relay if it did not pass the continuity and resistance tests. You don't want to catch your truck on fire! Otherwise, replace the relay. When we are running a performance car at the limits, having a fuel pump start to lose voltage, and therefore lose flow, can cause catastrophic problems. Info from every other site I looked at, only said how to do it using costly special tools. The (PCM) grounds the coil side of the relay through terminal number 85. Connect the ohmmeter between terminals 87 and 30. When the (PCM) energizes the (ASD) and fuel pump relays, terminal 87 connects to terminal 30. Once that wire has been found cut that wire so that you now have half of that wiring running to the fuel pump, and the other half running to the factory ECU. We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. If the light glows, there is incoming voltage. Also, There is a somewhat common problem with wires breaking due to acid from the battery. Anytime it receives 12 volts on pin 85, it will turn on the switch and make continuity between pin 86 and pin 87 on the relay. how to re-wire a fuel pump off a relay. If there are any fluctuations in voltage in this system, the fuel pump will also be affected. At the wiring you need to find the 12v supply wire from the ECU to the fuel pump. Steps: 1. Enginebasics is the wiki or wikipedia of car part, repair, how to and tuning information. So, When the automatic shutdown (ASD) relay is on; it supplies battery voltage (12+ volts) to the fuel injectors and ignition coil(s). "C" on the switch goes to the fuel pump, I don't know what wires to hook up to "N" normally closed or "NO" normally open. So now instead of the stock ecu energizing the fuel pump, it will energize this relay. 93 Chevy with '97 215 47rh 241DHD HE351cw/bht3b(26cm) Con7x12tagious. Anyboby out there know something ?. 6.7, aisin, 4.10s, bone stock... (for now :CRY. Now it is a real mechanical shutoff and i could take keys with me and leave it running and locked all day long. Connect the ohmmeter between terminals 30 and 87A. Now it is a real mechanical shutoff and i could take keys with me and leave it running and locked all day long.