Yes. The cost will vary depending on who you take it to and what is actually wrong.
As you wrote it, you replaced a fuse and suddenly the car would not start. Thinking it was a bad battery you tried a jump start. The car still did not start, but now you noticed that the radio, wipers, windows and gauges did not work. So you found a different BCM, installed it with no change other than the locked code on the radio. Correct?
The question then becomes. Were those items working before the jump was attempted that day? What caused the lighter fuse (which also powers the diagnostic port and the vehicle interface) to blow?
Are other fuses blown? Good thing to check. For instance there are two fuses that power the above systems. All are located in the under hood fuse block. Check the battery itself, is it charged? If it is completely drained it could be the problem.
How about this. Before you spend more money. Get the battery load tested. While your there get a cheap NON-LED style test light.
Next clean the battery terminals and be sure you are getting full voltage to the fuse boxes. Then check all the fuses. Once that is done, plug the old BCM back in. Recheck the fuses.
Do all the accessories work now? Run a battery jumper cable from the negative battery terminal to a clean spot on the engine block, try starting it, anything? Run the lead to a clean area for the car body (clean nut on the strut tower or ground stud) Anything?
Tuesday, January 24th, 2017 AT 12:15 PM