I have a 1991 Accord Wagon with an F22B engine out of a 1993 Prelude Si. The battery got hooked up backwards in the car with the resultant big spark and now no electrical power at all. The main battery fuse (80 Amp) did not blow which is probably too bad. I'm going to have the alternator tested; it's probably fried. Where is the main relay located in the Wagon? What else needs to be tested?

 

Alt is most likely toasted. But if you didn't try to turn the car on then everything else may be fine. Pop in a new Alt, hook the battery up and see what happens.

 

Test the fuse with a voltmeter.....that small wire inside the main fuse is hard to see once that clear plastic has aged.

 

Update: I let the car sit overnight and it fired right up. Tested the alternator and it is working fine. All I did was clean up the battery terminals and paint the negative cable black to cut down on problems in the future. So far so good.