98 tahoe, 2wd, 4dr. Need help determining why the ECM-1 fuse continues to blow. Wouldn't start after being parked for an hour. Found the ECM-1 fuse had blown; replaced fuse and it blew again as soon as I turned the ignition on. Checked fuel pump relay, tested good. put a test lamp in the fuse slot and sequentially disconnected the ECM, crankshaft position sensor, ignition control module, and ignition coil -- no joy; test lamp stays lit, fuses still pop. wires to CKPS, ICM and IC all tested good as well. Interesting find is that the test lamp goes out when the IGN-A 40A fuse is removed. Anyone have any ideas on what the problem is and how to fix?
Thanks
Thanks