There are a couple of reasons why the turn signals will not work on a 1998 Ford Explorer. The light bulbs may need replaced or a fuse has blown.
2002 ford explorer turn signals not working
replace flasher can Check fuse
The 1996 Ford Explorer owners manual shows : fuse # 22 - 10 amp - turn signals
The turn signal flasher on a 2006 Ford Explorer is under the dash on the driver's side. This vehicle has two flasher units, one for the turn signals and one for the hazard lights. They are next to each other.
The multi function switch is the lever for your turn signals , windshield wipers , washer etc .
If the 4 Ways/Hazards are disconnected then neither will work the park lights nor the turn signals.
1. Bulb 2. Fuse 3. Flasher 4. Turn Signal Lever
generally the tail light fuse is the same fuse as the turn signals
under the hood you should find a small 10A or 15A fuse. There is a separate fuse for the trailer turn signals.
1 fuse for all turn signals-try replacing bulb
Looking for Picture of Turn Signal Relay for a 1998 Ford Explorer.
Check the bulb it is double filamented with the smaller being for the stop and turn signals