Fowler posted the best round of the leaders with a 4-under 67. Both Higley and Suneson managed rounds of 1-under 70 to join Fowler at 5-under-par 137.
Stuart Davis (70), Santiago Luna (71) and Mikael Lundberg (68) are knotted in fourth place at minus-4 at the Val Course at Aa Saint Omer Golf Club.
Fowler began his round on the 10th tee Friday and promptly made birdie at his opening hole. He bogeyed the par-4 12th for the second consecutive day, then birdied 16 to make the turn at two-under par for the championship.
He parred his first six holes of his second nine, but closed with three straight birdies to match the group at minus-5.
'I'm a happy man after that finish,' said Fowler, who is the only European Tour winner of the second-round co-leaders with a victory at the 1993 BMW International Open. 'You have a few opportunities there when you are finishing on the front nine, you just have to pull off a couple of shots. I managed to do that.'
Higley played the course as intended and parred his first five holes. Like Fowler, Higley rattled off three straight birdies, although his run started at No. 6.
Higley, a tour rookie, bogeyed the 10th again, but collected another birdie at the 15th. He made bogeys at 16 and 17 to lose sole possession of first place, a fact that weighed on the Englishman.
'I was a bit disappointed to drop two strokes in the last three holes, but it was a good round considering the conditions,' said Higley, who played in windy conditions in the morning. 'My putting was very good today and I went to see an old friend of mine, Martin Cummings, who specializes in putting, so I went to see him and changed my setup, ball position, grip, stance and stroke. So just a few minor changes.'
Suneson started off with a birdie at the first, but parred his next five. He traded a bogey and a birdie over seven and eight and parred four in a row around the turn.
Suneson mixed two birdies and two bogeys over a five-hole span on the back to get his share of first.
'I am playing all right so it's good for me to be playing here right now,' said Suneson. 'And I do like the course. You don't have to shoot 15-under par to win and if you have experience and don't force situations then you have a chance.'
Steve Alker, Paolo Terreni and Julio Zapata all shot 3-under 68s on Friday to share seventh place at 3-under-par 139.
Overnight co-leader David Higgins struggled to a 5-over 76 and is tied for 19th place at minus-1. David Bransdon was one shot worse with a 77 and is in a group at even-par 142.
The 36-hole cut fell at 3-over-par 145 and Edoardo Molinari missed the cut by a stroke.