Hi everyone, My name is David and Im currently having a weird issue with my truck. I tried the search function but came up with no answers. I have a 2005 Freightliner Columbia with a Detroit Diesel Series 60 engine that will start without hesitation but will not turn off when I turn the ignition switch off. Ive tried replacing the ignition switch but the problem persist.
Other possibly related observations - When I turn the key to the on position, the gauge needles no longer do the sweeping motion and the "check engine" and "engine protect" light does not light up. There is also an Exclamation Mark inside of a Triangle symbol that flashes.
Any help is deeply appreciated. I look forward to learning more about my truck and possible even be able to help others in the future.
2005 Freightliner Columbia DD Series 60 - Runs but wont shut off!!!
Discussion in 'Freightliner Forum' started by e46s54dr, Nov 5, 2011.
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I would guess that the ignition supply wires to the ECM and dash are not going off when you turn the key off.
Are the temperature gauges and voltmeter dropping to zero when you turn the key off?
If you have a turbo timer I would start by disconnecting it.
If you don't have a turbo timer it is probably a sticking relay. Have a look on the relay board for a relay named something like Engine ECM, or Ignition Control etc. Unplug it and see if the engine cuts out. -
Does anyone have the wiring schematics or diagram for the whole ignition system by any chance?
P.s. Thanks for the help -
right side of fuse box has 4 studs.1 ground the others 12 volt.top 1 probably is missing power.first thing to check is all of small fuse holders in battery box (maybe 4 of them?)if good,check for breaks in wiring by following these wires.check if truck equipped with "low voltage disconnect"module.possibly defective.you could always "force feed"post in fuse box with a seperate fused power supply.good luck.
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Sorry for the misinformation but the gauge cluster actually remains on even when the key is off. I've check the 4 studs and from what I remember, one is a ground, one is a constant power source and the other are switched ignition and acc. I've also check the 4 fuses in the battery box in which one 30 amp fuse was corroded and replace to no avail. I'm going to try the voltage back up battery and recheck all the battery wires/voltage.
I have a feeling that whatever the problem may be correlates with the gauge cluster inoperability problem also. -
What is this fuse labelled as, eg gauges, wipers etc?
When you pull the fuse does the dash also turn off, or does just the engine stop?
What voltage is at each end of the fuse holder once the engine has stopped? -
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Sorry, the fuse I am referring to is the one that you have to pull out to stop the engine.
I can't see how the fuses in the battery box would cause your engine to keep running when you turn the key off. Dodgy battery box fuses are more likely to cause issues where your engine wont run at all. -
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When you pull the fuse does the dash also turn off, or does just the engine stop?
What voltage is at each end of the fuse holder once the engine has stopped?
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