A Ford Bronco with the 2.7L engine requires 6 quarts of oil for a standard oil change, including the filter. While some early models or manuals may have mistakenly listed 7 quarts, the official recommendation is now 6 quarts, so adding this amount and checking the dipstick is the correct procedure.
Mine was doing this when i first installed it. Went through 2 fuses before i figured out it was a loose crimp on my ground connection from the compressor to the battery. Haven't had the problem since i tightened that up.