Now Another Problem.....

Actually, I discovered what may have been the culprit all along. I broken solder joint! So, just for the hell of it, I left the fan plug ground straight grounded, and grounded pin 5. The damn thing worked! go figure. I'm warming the engine up now, to see if that fixed the entire issue.

LOL, figured it should work if pin 5 really went to the fan.

Which it always did, but I suspect that the ground may have been messing with it.

Sounds like it went to the fan but wasnt making a connection at the fan.

Nope. Still no fans, at 185. I'm gonna pull the battery, to reset the ECU.

Now that you now they work when grounding pin 5, dont give up. Do this.....

Quote:

---

Originally Posted by CoreyB

Ok, here is my take on this.
Pin 3 of the low relay needs to go to pin 3 of the radiater, currently would go to pin 6 on the to the ECU on the old harness.
Pin 4 of the low relay needs to go to pin 4 of the radiator, on old harness it would go to a resistor.
Pin 1 of the hi and low relays should have 12v.
Pin 3 of the low relay should go to pin 6 of the radiator, on the old harness it went to pin 53 of the ECU.

Ground pin 1 of the radiator. Now if you have power to one side of the radiator fans this should work. Test would be jumping pins 4 and 5 of either relay.

---

I don't get what you're saying. use the wire colors. The pins don't correspond anymore, aside from the red and black going into A-55 from the harness side, and the blue and green wire, also harness side. The big issue seems to be matching up radiator wires to harness wires in plug A-55.

harness side wires: black, red and black, blue and yellow, blue and green
Radiator side wires: Black (goes nowhere, it's been straight grounded), blue, blue and black, and another black.

That doesn't work anyways. Pin 3 and 6 on the radiator no longer "exist". They're the ones spliced into the ECU.

Why would they be spliced into the ECU ? If its the 91 ECU it has no fan control. Those pins are the ones that go to the thermal switches on the radiator to turn the fans on.

Exactly. They're spliced into the ECU to the EGR pins, which essentially do the same thing. Check the link out again. That's where he ran the red and green wires, or pins 3 and 6.

http://www.3si.org/forum/f53/1g-harness-2g-body-274771/