Maybe it's time to take it to an auto-electrician?
If what you need is service information, you can download the factory service manual for a 96 Tracker from Ack's FAQ, but once you've reached the limits of your skill set, then it's time to seek help, and I don't mean by asking questions online.
The blower controls are where I would focus my attention - the fan "speed switch" is known for coming apart on older vehicles and the "easy fix" is a nylon cable tie to hold it together. Assuming you know your way around a test meter I would suggest you grab the relevant manual pages and verify you're getting voltage at the blower motor resistor - if I recall correctly, the power flow is from the fuse to the fan switch to the fan and then to ground - so no voltage at the resistor would suggest a switch related issue.
If what you need is service information, you can download the factory service manual for a 96 Tracker from Ack's FAQ, but once you've reached the limits of your skill set, then it's time to seek help, and I don't mean by asking questions online.
The blower controls are where I would focus my attention - the fan "speed switch" is known for coming apart on older vehicles and the "easy fix" is a nylon cable tie to hold it together. Assuming you know your way around a test meter I would suggest you grab the relevant manual pages and verify you're getting voltage at the blower motor resistor - if I recall correctly, the power flow is from the fuse to the fan switch to the fan and then to ground - so no voltage at the resistor would suggest a switch related issue.
