I think that you should inspect the wiring harness as I’d suggested previously. Look for chafing in the loom. If you find areas where it’s rubbing, open the loom up for closer inspection . The wire you’re looking for is dark green and white.
No need to buy a new relay for testing, just swap with the horn relay.
Alright, the split loom near one of the transmission plugs crumbled when I started touching it but the wiring underneath appeared to be ok. I ran a continuity test from the PCM connection to the pin on the transmission plug for solenoid circuit and it came up good.
What are your thoughts at this point? Still a possible wiring issue? If so, how can I test for it since continuity came up good?