With a vastly improved defensive effort and good work at the set piece, Wellington played with pace and width to run in three tries in each half for a much-needed bonus point win.
The win moves them onto 16 points with Auckland, leaving Southland on the bottom of the premiership with 15.
Jane was a constant threat, breaking the Northland defensive line time and again before combining with captain Jeremy Thrush to set up a wave of Wellington attacks.
Gear's pace also provided options, and his strength saw Wellington attack the Northland line with venom close in as well as out wide.
The result was a vast improvement from Wellington's last two games - a 40-20 loss to Hawke's Bay and a humiliating 32-0 loss to Bay of Plenty.
Early errors from Northland gifted Wellington a surfeit of possession, and they made the most of it.
An early penalty from first five-eighth Lima Sopoaga was bolstered by a Frae Wilson try in the ninth minute, after Wellington built field position. A strong attacking scrum from five metres out saw No 8 Faifili Levave charge the line, offloading for the nippy halfback to cross.
Although Sopoaga missed the conversion, Wellington extended their lead after 20 minutes when winger Alipate Leiua scored in the corner, backing up 15 minutes later with a second.
Sopoaga's conversion saw Wellington go into the break 22-6 ahead. Northland relied on Lachie Munro's boot to stay in touch.
There was no let up in the second stanza, Jane making the initial break before the ball was spread wide for Levave to score after just two minutes.
Two more Munro penalties kept Northland within 10 points after 55 minutes, but tries to Victor Vito and replacement hooker Dane Coles saw Wellington out to a 43-12 lead with 20 minutes left.
Northland stole a consolation try when captain Jared Payne snared an intercept as Wellington tried to move the ball wide once too often.
Wellington outgun Taniwha in ITM Cup
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