Self Join in SQL - SQL database

CREATE TABLE #WorkingData
(
receipt_id int
,receipt_item_id int
,fulfillment_type_id int
,created_dt smalldatetime
)

INSERT INTO #WorkingData
(order_id
,item_id
,vendor_id
,created_dt)
(SELECT order_id, item_id, vendor_id, created_dt
FROM database1.dbo.vw_table
WHERE created_dt < dateadd(mi, -61, getdate())
AND vendor_id IN (0, 15, -1000, -1015))


SELECT Distinct wd.order_id, wd.item_id, wd.vendor_id, w.vendor_id, wd.created_dt
FROM #WorkingData wd
JOIN #WorkingData w
ON wd.item_id = w.item_id
--WHERE w.vendor_id IN (0, 15)

I am trying to get a result back that will give me

order_id, item_id, vendor_id (positive number), vendor_id (negative number), created_dt

Help.

I need to do a self join?

at the beginning i made an error it should be vendor_id not fulfillment_type_id

thxs