Found some more nors made in USA real ECU's, boxes are trash and wont be shipped. All tested fine. Asking $45 shipped lower 48. Used on most 72-79 applications
The only difference in the circuit / ECM with the dual ballast is that the second ballast resistance feed power into the 5th pin on the ECU. That is no longer used, and unless you find a really old original vehicle or really old NOS, most any new ECU WILL be 4 pin.
You can use a 4 pin box in a 5 pin harness, but not the other way...
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The only difference in the circuit / ECM with the dual ballast is that the second ballast resistance feed power into the 5th pin on the ECU. That is no longer used, and unless you find a really old original vehicle or really old NOS, most any new ECU WILL be 4 pin.
You can use a 4 pin box in a 5 pin harness, but not the other way...
Read more
