Vehicle steering began to shake violently intermittently, I pulled off the highway and began to inspect front wheels. I saw fire on left side of engine through the wheel well. I extinguished fire with hand extinguisher. Fire department inspected and saw no danger to move vehicle. Vehicle was towed. Inspection by dealer was inconclusive. (!) I would not trust it to drive. I brought vehicle into company shop and inspected myself and found starter wire routed between brackets on engine/cross member. The cable was burned/ shorted and the cause of fire and electric steering malfunction. Any further use would certainly cause another incident. Vehicle was returned to dealer for replacement of harness. Dealer stated no recalls or known issues related to this. Inspected another vehicle of same type and wire is similar routing. Vehicle showed no symptoms prior to and no codes set after incident. One photo from below, driver side engine/transmission mounting, burned cable dead center.