Tail lights and dash lights not working.

[Thedude5804]

I have a 1994 Chevy K 1500. I had the bed off of it recently and then after putting it back on a few days later I lost my tail lights and dash instrument lights. Headlights and brake lights still work. The fuse was blown so I replaced it and pop to the next one. Then I changed out the headlight switch and that didn’t change anything. Could it be a bad ground from the bed to the frame? I remember now there was a ground wire that I did not reconnect, but everything worked for three days after I put the bed back on . The fuse pops as soon as the switch is turned on.
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