Count Your Blessings -
Friction on wiring, wiring getting brittle, and MOSTLY ground issues rearing their head are pretty common for ghosts you are describing. Think how much worse it is for most other guys having the car actually die or not start, compared to a wonky radio. Depending on installation method I wouldn't be too quick to discount the problem being there.
After you read everything you can in the FSM (CCM and the rest), then comb the forum and attend all known ground gremlins, and then finally what I'd do is pull the whole dash apart as much as possible yet still stay driveable and hunt for symptoms with as much exposed as possible. I had an issue come up years ago the cruise would cut off with a left blinker. That lasted 4 years and then neever happened again 5 years ago. And sometimes cruise still won't resume --- and it's the old, "turn off the key / wait til the motor stops / and restart / and all better.
You wanna feel sorry for someone, feel sorry for me. My new FWB has just a cassette radio. And the dam thing doesn't have the decency to just stop working so I'm saved from having to listen to the crap radio! I'm doing a crowdfund for a Nexus 7 any day now.
Seriously, you can pull the firewall connector under the steering if you think the sensor/potentiometer is somehow the cause.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!
Last edited by 96 Black; 02-24-2017 at 02:08 PM.