i have a 02 250 SD 7.3 diesel
lately while im driving the power has been going off in the dash... resets and comes back on.. speedo, radio and other things go out. the motor dose not shut off while im driving when this happens.. i did notice that the battery light comes on when this happens. i checked both battery's and they are 100%. i cleaned all the battery post's and wires that connect to the battery's.. anyone have this happen or have heard of this before ??

any help would be appreciated thanks..

 

What about the alternator?

 

You are losing power to the cluster. Check fuse 35. I am having a problem with fuse 35 but in a different way. Fuse 35 powers the cluster and if the cluster loses power, the battery light will stay illuminated while nothing else works. You might just have a fuse problem or it could be the wire, like in my case where I am having to trace it through the harness.