I couldn’t help with bypassing it, but here are two things that may be worth checking:
1. Is the connector that plugs into the blower switch at the panel melted or damaged? With the blower on, move the connector around to see if the blower stops. It could be a loose or bent female terminal (or whatever they’re called) in the connector.
2. The blower ground wire connection is attached directly to the blower housing. With the blower on, move it around and see if it’s loose.
Your symptoms mimic those that I saw when the connector was melted in my 98.
^^^ this
Everything @workingonit said points to a poor electrical connection. Somewhere, in proximity to where @workingonit strikes the panel (and the blower responds), is the poor connection.
"Poor" could mean the connector itself is loose or oxidized, as noted by @east302.
"Poor" could also mean the wiring has been compromised in some way, although this is less likely than a poor connector.
@workingonit, the wiring diagrams / wire color codes are available in the service manuals, and they can be found here:
88-98 Service Manuals
Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...
www.gmt400.com
@east302, didn't you post the wiring for the blower circuit recently, in another thread?
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