I've been driving my dads truck. I now have a problem with the wipers. The low speeds don't work but the highest two notches do. I still have windshield washers. I'm lost and could use some help on where to look. Any help wouldbe appreciated.
My guess would be the switch. Sometimes they call that a "multi function switch" because it also controls the turn signals and your 4-ways. It is easy to change, IIRC just pop out the ignition key switch, take off the upper and lower shrouds and it's right there. Pull the negative cable b-4 you start and wait 5 minutes....you are in air bag territory. New ones are in the $45-50 range and salvage yard around $15...(in my area). Good Luck.
Intermittent wipers went squiffy on my '98 XLT. All the intermittent positions usually gave one sweep of the wipers. The low constant speed position gave 1 intermittent speed & the high constant position gave constant wiper action.
The GEM module was suspected. This Black Box is deeply buried behind dash left knee panel, a PITA to R&R.
Was going to try to find replacement at U-Pull junkyard, but just the probing, jiggling & attempt to check if wires going to GEM were snug, in place, restored proper functioning.