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Apologies for taking so long to get an answer back. I got delayed on other issues. The 4WD Hi / 4WD Low flashing intermittently would be the issue to help with. From what I've read online, it sounds like it is associated with the GEM or sensors in the differentials. It also sounds like the power windows not working is related to it, but let's go for working on the 4WD lights flashing as the problem.
I have an ODB2 scanner, and it reports no stored codes. It can also display live information, but there is nothing there that seemed helpful. I had the scanner connected while driving and refreshed it while lights were flashing - still no codes. I have noticed that the lights first flash when the car is first started after all systems "boot" (air bag light goes off, seat belt light goes off). Then they flash 6 times. Every 2 minutes after that, they flash 6 times again. The only consistency is the 2 minute interval. The way the vehicle is being driven at the time (cruising, accelerating, coasting, up hill, down hill, cornering) does not affect when they flash - only the 2 minute interval affects it.
Thanks for your help.
OK. Car is my son's daily driver, so it may take me a day to get to it. I'll try tomorrow evening. If not then, it would be Friday evening. I'm going to assume my scanner is not sophisticated enough - it was the least expensive one that could display live data, and I needed that for a specific purpose when I bought it. I've seen suggestion that people go to AutoZone since they have scanners. Would theirs be sophisticated enough? There is one just around the corner and it is my preferred parts store.