MAN TGA 41.460 Error Code ZBR 3502-10: Brake Pedal & Lamp Issues w/o Trailer Connection

MAN TGA 41.460 4 axles.All fuse and relays are ok.I have an ERROR CODE ZBR 3502-10.I checked with Delphi trucks.When i press the brake pedal i have 0,9 A at braking lamp of tractive unit and 2,1 A at braking lamp of trailer(without connect any trailer on the truck).If i add 2 more bulbs on the existing brake bulbs then i have on Delphi 0,9 A at braking lamp of tractive unit and 3,1 A at braking lamp of trailer(without connect any trailer on the truck).I have connected the braking bulbs on cable no 43300 as i saw in MAN TGA wiring diagram.Can anyone help please?

Error code ZBR 3502-10 indicates a problem with the electrical circuit of the brake system. Measuring the current on the lamps when the brake pedal is depressed indicates that the electrical circuits are working properly, and the problem may be due to insufficient lamps in the circuit or problems in cable #43300. Adding more bulbs should increase the current at the brake lights, which you can observe on the Delphi https://uz-mostbet.net/.

I checked as you said. The current is OK around 24.2 volts. When I add bulbs the current remains the same and I have an increasing amperage which is normal due to more bulbs. I suspect now a leakage somewhere on the cable. The fault is on from the first second I turn on the keys. What do you believe?