trailer brake system fault

[empty wallet]

wtf is happening? This just happened today. 2022 K/R, 3.5, max tow, 157" started engine, turned on a/c, my reward was a trailer brake system fault light, turned off a/c light turned off. turned a/c back on and fault light came back. Now here's the kicker, no air flow from hvac system at all, vent, defrost or floor vent. Also when hvac is turned on 4x4 also engages along with trailer fault light.

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[RomeoZulu]

Have you found a resolution to this problem?

 

[empty wallet]

Yes, faulty ground wire connection on firewall.

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