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Old 09-09-2019, 08:49 PM   #1
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Losing power to dash

Today while traveling on I80 in western Nebraska, I lost all of my gauges, and as I pulled to the shoulder, the engine shut down. I turned the key off for a few seconds. When I restarted the engine, everything seems normal.

While trying to diagnose this issue, I pushed the auxiliary start switch. The dash lit up as though I had turned on the key. But the key was not in the ignition. Can anyone shed light on this problem.

2010 Phaeton on Freightliner chassis.
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Old 09-10-2019, 09:22 AM   #2
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Most of the freightliner Chassis I have looked at have a black and white wire running directly to the batteries... this lead has a small fuse in the circuit and runs directly to the ECM... I had a neighbor who had his battery chassis batteries changed and the dealer put the black (hot) on the ground side... I spent a few hours trying to lean why the engine wouldn't start...


I finally noticed that none of the dash gauges worked and contacted Freightliner... he sent me a wiring diagram and sent me to the tests that check for voltage at the correct terminals when the KEY IS OFF...


Once I got the wires correct it started and ran fine and the gauges were good...



It's my guess that those connections are bad... and need to be cleaned...



Hope this helps..
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Old 09-20-2019, 09:11 AM   #3
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Iíve cleaned connections at starter, batteries, and behind dash. Have since driven 1000 miles with no issues. Thanks for your input.
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