I have a 1995 freightliner fld120 with a DDs60 and no matter if I’m driving or if I’m sitting still the truck will emergency shutdown when I turn on my lights. Barely started happening Monday and I took a week off before that. Both the check engine and emergency shutdown lights cmon on. When I drive all day without the lights on it runs perfectly fine but a minute or so after I turn the lights on it shuts down. I have no clue if this is simple or serious.
Truck shuts down when I turn on my lights switch
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Angelt6284, May 17, 2022.
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Some one has been making changes in wires behind the dash??
blairandgretchen Thanks this. -
My only guess is that your light circuit is somehow tied into/rubbed into a low oil pressure switch or other critical shutdown event.
If it has a diagnostic switch you can toggle that and read the 'blink codes' - better yet have it plugged in to see what the CEL/SEL codes were.
It may help you isolate the problem.
Report back please !cke and spsauerland Thank this. -
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blairandgretchen Thanks this.
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Dealer sure, but any heavy diesel mechanic should have one that works with an engine that old. Call around and give the symptoms and see id they can diagnose it.
Sounds like a bad ground somewhere, or a broken wire that is causing feedback when you turn the lights on. Don't expect it to be found right away, but on the same token the mechanic might get lucky too. -
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blairandgretchen Thanks this.
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blairandgretchen Thanks this.
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