Stumped and looking for some help

[RustyLove]

Hi guys I'm new here and looking for some help. I have a 1994 F350 7.3l idi N/A and the wiring has seemed to go on the fritz. Everything had been working fine until a few days ago when these issues started happening. When I start the truck the tachometer will jump to a random rpm before not reading at all, the directional switch will cause the tachometer to jump at the rhythm of the blinker before going to zero, the blower fan speed switch is acting like a dimmer switch for the gauge cluster, and the aftermarket radio that worked before won't even turn on. I've checked all fuses both in the cab and under the hood and nothing is blown. I'm pulling my hair out and need some guidance. Thanks

 

[Thewespaul]

Check the ground from the body going to the driver side battery post.

 

[austin92]

Something that bad, I’d make a “triangle” of grounds. Body-frame, frame-engine, engine-body. Worked for me on my old jeep Comanche with dash issues


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[Oledirtypearl86]

I'm with the others bad ground check and clean them all

 

[RustyLove]

Thanks for the insight guys I'll be trying that this afternoon