Their 3-1 win over Coppull United - their first at home this season in the league after eight draws and six defeats - puts them three points ahead of Poulton in the final relegation spot.
Both have two games left and meet on the final day of the season.
Kieran Sisson's opener was cancelled out by Cameron Murphy before half time but second half goals from Osman Karakan and Vladut Spiradon sealed the precious points.
Wyre Villa Res v Fulwood Amateur A. Pic; Derick Thomas
Wyre Villa Reserves marked their promotion to Division One Reserves with a 4-2 win over Fulwood Amateurs A.
Aaron Hewitt opened the scoring for the visitors but a Rob Norton double put the hosts in charge.
Ben Cecil made it 3-1 before half-time but Sam Wood made it nervy with an 80th minute effort.
Daniel Hudson sealed the points as the game headed into injury time, before they received their promotion medals from the league's John Brown. (pictures by Derick Thomas)
TUESDAY ACTION
Reece Pearce grabbed four as Slyne-with-Hest trounced Vickerstown 8-1 on their own patch.
Rob Slinger notched two with Finley Lynch and Ben Danvers also on the scoresheet.
Mike Rushton was the sole scorer for Vickerstown.
Fulwood's title ambitions ended on Saturday with defeat at Tempest and they suffered another loss at CMB.
Daniel Locke opened the scoring but Lucas Weaver made it 1-1 before the break. Daniel Crook then settled the match in CMB's favour with a penalty straight after half-time.
In Division One, Wyre Villa now need five points from their last four games to haul in Hesketh Bank to secure promotion after a 3-0 win at Kendal County, Harvey Close, Ryan Moore and Oliver Evans doing the damage in Cumbria.
Haslingden St Mary's prevailed by the odd goal in seven at Eagley. Rhys Barton (2), Leon Barker-Williams and Luke Taylor were the scorers for Haslingden with Rhys Hardie (2) and Bailey Wallace on target for Eagley.
Joe Tindale thought he was the matchwinner for Askam at home Millom but Ben McDonald earned a point 10 minutes from the end as it finished 1-1.
In Division One Reserve, Adam Whittaker left it late to secure a home win for Lostock St Gerards, his 86th minute strike enough to see off Eagley.
And an own goal was enough to separate Euxton Villa Reserves and Poulton Reserves, the former returning home with all three points.
MONDAY ACTION
Carnforth Rangers were presented with their Division Two runners up trophy after securing a 2-2 comeback draw at Charnock Richard.
Luke Power and Jack Bennett had given the home side the advantage but the visitors showed their promotion credentials by roaring back through Damian Murphy and Stan Rich.
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