LS Swap and Electric Fans
03-07-2018, 12:52 PM
#21
If a jumper between 30 and 87 turns on the pump then the relay itself could be bad. If you've got a multimeter you can apply power and ground to pins 85 and 86 of the relay and when it clicks over meter between pins 30 and 87. You should have near zero ohms between them when energized.
03-07-2018, 01:12 PM
#22
But you know for sure the relay is clicking on? The relay coil gets power from the PCM to energize one side of the coil and the other side is grounded. You can apply 12 volts to coil and it should turn on. If it still does not turn on then you've got a bad ground on the relay coil.
03-07-2018, 01:25 PM
#23
But you know for sure the relay is clicking on? The relay coil gets power from the PCM to energize one side of the coil and the other side is grounded. You can apply 12 volts to coil and it should turn on. If it still does not turn on then you've got a bad ground on the relay coil.
03-07-2018, 08:03 PM
#24
Just to confirm, the wire from pinout 9 is basically only to power the relay with 12v for priming the pump only, correct? Meaning, it will not continuously send power to run the fuel pump? Also, am I doing any damage to the ECU by driving the car with a jumper wire in the relay? With the relay plugged into the socket, would it still click if it wasn't getting a good ground? I can confirm after trying three different relays that the relay is good. I'm learning a lot about electronics and wiring from you guys and I REALLY appreciate it because that is definitely something I don't know a lot about. Very mechanically inclined but electronically challenged.
Last edited by bpope; 03-07-2018 at 08:30 PM. Reason: Grammar