The second round at Emeralda Golf & Country Club had an early two-hour delay because of the threat of lightning and was eventually suspended due to darkness. Play will resume at 7:00 a.m. local time.
Round three will follow the completion of the second round with players teeing off in threesomes off both the first and 10th tees.
Ter-Chang Wang, who shared the first-round lead with Jaidee, Dyson and David Higgins, is at minus-9 through 13 holes of his second round. Wang stands alongside Stephen Dodd, who has also completed 13 holes.
Rahil Gangjee fired a 5-under 67 Friday to move into a tie for fifth place at 8-under-par 136. He is tied there with Andrew Buckle (69) and Wilhelm Schauman (68). Higgins is also at minus-8and has completed 12 holes of his second round.
Jaidee began his round on the 10th tee and picked up back-to-back birdies to start his day. He slipped to a bogey on the 14th and another on 15, but caught fire around the turn, though.
The 36-year-old eagled the par-5 17th. Jaidee came right back with a birdie on No. 18 to make the turn at minus-9. He converted an eagle on the par-5 first for the second round in a row.
Jaidee birdied the second to move to 12-under. After a bogey on the fifth, the Thailand native got that stroke back with a birdie at the seventh. Jaidee, however, three-putted the eighth en route to a double-bogey to tumble back into a share of the lead.
'In golf, you never know what will happen on every hole,' said Jaidee, the two-time defending champion at the Malaysian Open. 'I am happy to be where I am. There are two more rounds and I have a chance.'
Dyson followed Jaidee off the 10th tee. He got to a quick start as well after he birdied the 10th and 12th. The Englishman tripped to his first bogey of the tournament on the par-3 13th, where he three-putted.
The 28-year-old recovered that stroke with a birdie at the next par-3, No. 16. Dyson cruised to three straight pars around the turn, then moved within one of the lead as he birdied the second. Dyson birdied the par-3 eighth to join Jaidee atop the leaderboard.
'I have played a lot of golf with Thongchai and we seem to feed off each other pretty well,' Dyson said. 'Hopefully I will be paired with him the last two days in the last group. He has beaten me a couple of times and I have beaten him a couple of times. He is a fantastic player, so hopefully he will inspire me and push me along as well.'
Anthony Kang completed two rounds at 7-under-par 137 after a second-round 70. He shares ninth place with Thammanoon Srirot, who has played 13 holes of round two.
Anders Hansen is one stroke further back at minus-6 after posting two rounds of 3-under 69. He was joined there by Peter Gustafsson and Scott Strange, who are both through 15 holes, Jamie Donaldson (12 holes) and Brad Kennedy (nine holes).