So, yes I do have the turbo harness when the swap was done. I literally transferred the motor and harness.Ok. Noted. Will use the 91 diagram.
So if you have a 91 NA body harness you should not have the round 4 pin plug connected to the relay nor the rectangle 2 pin plug connected to the resistor. The second resistor here is the fuel injector resistor so ignore that as it not part of the system.
If you do, then it is a turbo body harness.
OK so lets run through the OEM system and then how you have wired it.
OEM you have the Circuit Opening Relay which sends power from the Main EFI Relay to the Fuel Pump Resistor Relay. It can only do this when the key is in the STA position and when the engine is running. The FC pin grounds through the ECU controlling the safety part of the system.
Once the Fuel Pump Resistor Relay has power to pin 3 it will by default send power to pin 4 through the Fuel Pump Resistor then to splice point E2 then on to the pump. This will make the pump run at slow speed.
When the ECU deems necessary it will ground pin 1 of the Fuel Pump Resistor Relay switching it so power runs from Pin 3 to Pin 2 sending the full 12v to pump making it's speed fast.
You mention that you get power to pin 3 of the FPR Relay which makes sense. That comes from the COPN Relay. You should then have power going through the relay to pin 2 or 4 depending on what the ECU wants.
So based on your red line diagram you have added a wire from Pin 2 of the resistor to the fuel pump direct? And if you do not have this wire installed the pump does not run?
So this means you do not have the ECU switching the relay to get power from Pin 2 of the FPR Relay. You need to run a wire from Pin 2 of the relay to the pump to make the system work fully.
You need to confirm the relay is switching.
You mention there is no continuity between pin 2 of the resistor and fuel pump and also pin 2 of the relay and the fuel pump?
View attachment 84397
Yes correct no continuity between the FP relay, resistor and FP.
so, do I have to run a second wire from FP relay pin 2 to the FP? For example, the FP connector under the ashtray there is one small and one larger wires pinned into the connector positive side.