I have a co-worker who’s car has a strange issue…When it is 25 degrees or colder here in MN, the cars left side blinkers don’t work at all. Once the car has warmed up, they work fine. He has taken it to the dealer several times and they cannot duplicate/repair the issue…it’s a 2005 Suzuki Reno with 13,750 miles. Thanks!
Your friend, whose Suzuki has this problem with the directional signals on one side of the car, needs to check for a bad ground to either of the directional signals on that side of the car. Extreme cold can make a weak ground connection into a non-existent ground connection.