Post by twistedindustries on Jun 10, 2018 1:36:17 GMT -5
I am swapping my 1990 ranger and the donor car is 1984 capri with a LA3 ECU. I've got a couple questions after following the 91-93 guide as suggested in previous searches.
Pin 12, now pin 5, of the ICM is supposed to go to pin 4 of the ECM but mine goes to pin 7 on the instrument cluster. Pin 4 of the ECM actually goes to pin 6 of the instrument cluster as shown here:http://www.therangerstation.com/tech_library/EDiagrams/files/Diagram_Ignitionsystem_1990_2_3.JPG I realize it shows there is a splice connecting the two wires [S126] but I can't seem to verify this with a multimeter anywhere. So I am not sure exactly how to connect my coil [harness pictured below], my coil has two green wires, and one red wire. One green wire has something inline and seems to be a "resistor in-line diode" as described on page 4 of this pdf: www.mc-machine.com/pdf/1984.pdf. Testing on each side of the "resistor in-line diode" with a multimeter I get no continuity.
How should I hook up the coil wires, I am thinking that the wire with the "resistor in-line diode" should go to the wire that goes directly to pin 4 of the ECM [and pin 6 of the cluster] and the wire with nothing inline should go to pin 5 [previously pin 12] of the ICM, does that seem right?
I don't know what the cluster has to do with anything. It's never once mentioned in the swap guide since none of that is modified, cut, or moved at all. The coil wiring is self contained between the TFI and coil. You just tap into it right at the TFI and leave the rest of the stock wiring alone and the tach, TFI, and coil will work.
Post by twistedindustries on Jun 28, 2018 18:51:46 GMT -5
Just wanted to report back. The block in the ground wire turned out to be a 22k ohm resistor. Mine was bad, so I replaced it with a new one. That ended up getting connected to the wire that goes to pin 4 on the ecu which wasn't the wire on the ignition module. The other ground wire got connected to the tach wire which was the wire coming from the ignition module.