| Re: 1985 C4 - almost frame off |
Subject: Re: 1985 C4 - almost frame off by Vette91 on 2015/6/7 16:51:26 I used a 1.6mm spiral drill to get the pins out. ECM is almost done. 3 wires left ... B9 VSS low (401) B10 VSS high (400) B11 VSS to dash (???) According to what I found until now the Vehicle Speed Sensor puts out a 4k pulse sinus wave to the dash. But with the '730 the 4k sin wave goes to the ECM first. That would mean I should run the VSS to the ECM B9 (401) and B10 (400) then use the B11 output back to the dash. I found a wiring diagram at the service manual: 401 and 400 are the speed sensor. These wires go to connector 12034348 and finally to the instrument cluster at D11 (400) and C15 (401). There is an output at the Cluster D12 going to the old ECM as speed sensor signal. This is not used during the conversion to '730 ECM. Now I'm not sure what to do ... Cut the wires 400/401 sensor to cluster and connect them to the '730 B9/B10 and do ??? with B11 ... Or not cut the wires to keep the connection of the VSS to the instrument panel and splice them to the '730 ECM? I don't like getting computer gremlins so maybe you guys can give me an advice? |
