Lightning strike

I have a 97 9800 cabover and had lightning strike really close to truck not sure if it hit truck directly or not. I was in its trailer when it happened. Scared the crap out of me! Anyways the next day my driver goes to leave and the truck dies on him twice within 5 miles and the water temp, tach and speedo no longer work. They go through their test cycle then nothing. Truck restarted normally. Just no gauges. So I decided to change Trucks out and send the trailer to its destination. Hook up new truck to trailer and start checking lights and the rear stop and turn lights not working on either side. Bulbs blew. Changed them and he went on his way.
I checked fuse and everything is good. Also the engine warning light is on along with the ABS LIGHT. Truck will start and run I even drove it about 5 miles without it dying just no gauges still. All lights on truck still good. My question is where to even start to diagnose this. Fuses good no visible burnt or damaged wires. Checked main plug going Into cab looks good and tight. Checked sensors at engine (Detroit 60series) and they all seemed good.
Is there a way to test instrument cluster? There is power getting to them. Any ideas would be greatly appreciated.

Joe

 

Thanks guys for the responses. I am currently waiting for a buddy to bring his computer over to read codes. I'll let you know what they are when I get them.