Truck Repair: M-11 CUMMINS, wire weather, engine harness

Question
I HAVE A 95 VOLVO WITH M-11 THAT WON T START. i KNOW IT IS AN ELECTRICAL PROBLEM BUT DO NOT KNOW WHERE TO START. WHEN YOU TURN THE SWITCH ON THE SPEEDOMETER GOES TO 5 MILES AND HOUR YOU CAN HEAR A HUMMING SOUND THATi CAN T LOCATE AND AFTER A FEW SECONDS YOU HEAR THE INJECTORS START CLICKING AWAY ALL UP AND DOWN THE HEAD ANY SUGGESTIONS? THANK

Answer
I havent heard of a M11 doing that but have heard a N14 do it.It was the engine harness bad when the injectors were "clicking" and not running.I would try a Engine position sensor first.Located on the fuel pump side in the gear housing.Has a 4 wire weather pak plug.A Volvo uses the engine ECM for all gauges.