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I have a 2005 450 and last month the car starter motor did not crank the engine. There are many potential causes.
If the starter system was working properly and the shifting system was working properly prior to the no crank problem...theb this could be the problem.
With mine, appearantly G+K did some rewiring of the speedometer. I noticed that along with the no crank problem the 3 bars were flashing in the transmission display on the speedometer and other times the transmission indicator was blank, no flashing key symbol.
IT"S A LOOSE WIRE TO THE SPEEDOMETER. I banged on the on the speedometer and one of the illumination lights flickered and then came fully on. At the same time the key symbol started to flash and I knew i had found the problem. The car statrted normally, except the 3 flashing bars needed to be reset by a battery disconnect. The speedmeter has it's own computer which talks to the main computer and is telling it that something is wrong (from the loose connection) and the main computer responds by not starting the car.
I removed the speedo and "exercised" the wires and connectors to "improve" the bad connection. I have had no problem starting for the last month.
Many suggestions were proposed as to what was wrong, from dead battery, bad grounds, bad starter motor, bad transmission motor. Non of these were the problem.
One suggestion that should also be checked is the brake switch, as it is prone to failure and would result in a no crank condition. Any questions call 845 298 4229.