Index the first instance of consecutive >0 data in a row of information?

I am using the following formula to identify weeks of no usage over 26 weeks of information:

{=MAX(FREQUENCY(IF(J4:AI4<0,COLUMN(J4:AI4)),IF(J4:AI4>0,COLUMN(J4:AI4))))}

where the data in J4:AI4 is sum of usage in each week, weeks numbered 1-26 in row 3. This formula returns the number of consecutive weeks an item was not used. (NOTE: A week with no usage returns -.0001, all other values are >0)

I am looking for a way to return the week number of the beginning of the consecutive weeks of no usage. I have not found anything that works yet.