2002 Chevy 1500 Express with the Explorer package. Problem is the motorized bench seat/bed. Wires to the motor have 12V all the time. Removed the up/down switch completely from the circuit, no change. Went looking and found a bank of 4 30 amp relays that the motor wires and power run to. When the left two relays are removed, power to motor stops. I replaced them with the other two relays, no change. I read somewhere that there should be a controller, but I can't find one wired in the circuit. If need be I can by a new controller and run new wires, but I'd rather fix the problem. Any ideas guys?