my heat won't work
Yea, the 1993 Buick Lesabre does have a fuse for the horn. However, there could be other reasons why the horn doesn't work, the clockspring or relay could be out.
Sensor is likely bad
It could be the remote has a dead battery. If both remotes don't work, seems like the sensing unit in the car has failed. The remote battery is the easier problem to fix.
i don't know.... you tell me.
yesgo to walmart and buy a plug kit
The resitor is probably burnt out on the high mode
Turn signal flasher may be defective
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350 is supposed to be in a REAR wheel drive car, while 2000 LeSabre is front wheel drive. I guess it will be insanely difficult to make it work.
Bulbs or turn signal flasher, maybe even the switch.
did you check the fuses first? Do you have power to the master switch?