Hey guys.
I was installin a stereo system and i grounded out the 12v ignition fuse so i replace the fuse. When i go to turn my car on the battery reads a little above low so i figured when i grounded out the 12v igniton that it drained my battery so i place the battery on a slow 12v charge (overnite), when i put the battery back in it reads the same a little above low. any i deas on what this could be i checked all fuses all ok. except the wierd ford special fuses dont know how to check them. BTW i have a 96 ford explorer 4.0 v6. any help would be appreciated.

P.S. another wierd thing before that happened my chk engine light was on but after that happened it went off........?