I've searched and cant pinpoint my issue. Last winter my fan locked up and fried, including the pig tale. It was still frying even with ign off. Had to cut it. Got a used fan and a pigtail from JY. Installed and still wont come on. Switched a supposedly good ircm and nothing. I checked the fan with a jumper from battery. low speed worked, high speed did not. So I bought a new fan motor. Wired it in. Will not come on. Tapped the ircm, disconnected the temp sensor and will not come on. Is there anything else I can check? I have a IC fan on a switch, my only option seem to wire a relay into that from the batt and just have it run full time. Car is a 90, auto, minor bolt ons and a chip from Dave. The chip did kick the fan on earlier... Thanks in advance.