ZBR failuer During welding something short in Truck and Truck didn't start afterwards. I had change EDC and Ffr then engine start and gears are also ok but in display now it shown ZBR failuer and ni lights in dashboard and gauges are not working..I test the ZBR of other truck of same model but problem remain same .wat should I do now???

But before you send it to MAN sc, please try reset it yourself. Unplug the power terminal for 15mins then put it back. But before you send it to MAN sc, please try reset it yourself. Unplug the power terminal for 15mins then put it back.

You can try reset it like Kenny says but remove the neg and pos cables and connect them together and switch the truck on.
Leave it on for 30 min or more. Then switch of the truck, put back pos cable and then neg cable. Start up and see if the problem is fixed.
Other thing you try is to remove the speedo cluster and just swop it with a other one if you can get hold of one.

Also check if your eath wires are still sound at the chassis and all earth points. The current could have damaged some of the earth wiring.

Hope it will help. You can try reset it like Kenny says but remove the neg and pos cables and connect them together and switch the truck on.
Leave it on for 30 min or more. Then switch of the truck, put back pos cable and then neg cable. Start up and see if the problem is fixed.
Other thing you try is to remove the speedo cluster and just swop it with a other one if you can get hold of one.

Also check if your eath wires are still sound at the chassis and all earth points. The current could have damaged some of the earth wiring.

Hope it will help.