2000 Super Duty, lost my running lights but no blown fuses... - Ford Powerstroke Diesel Forum

 
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post #1 of 7 Old 10-06-2009, 08:59 PM Thread Starter
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2000 Super Duty, lost my running lights but no blown fuses...

Subject says it all. I've checked all the fuses and they're all in tact. All lights are off meaning something failed like perhaps a relay or possibly even the switch. Also the warning noise "your lights are on" doesn't come on. Headlights work fine.

Only reason I could see them failing is I was towing a trailer with questionable wiring all weekend, perhaps there was a grounding issue or something but it took out wiring for both the trailer and the truck if this was the cause.

1999.5 Super Duty 7.3, Auto, Supercab Long Bed, 4" Exhaust, Air Bags, slight lift and 285 tires, stockish.
1969 Toyota Land Cruiser FJ55 Station Wagon, on a locked '94 Land Cruiser frame and suspension, Cummins 4BT, NV5600, built Dana 300, in progress...

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post #2 of 7 Old 10-06-2009, 09:37 PM
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did you lights work on your trailer?

also you can check with a multimeter at the plug to see if you have power while the switch is on.

look in the manual for all fuses and relays. make sure they are all good.

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post #3 of 7 Old 10-06-2009, 10:29 PM
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Okay - Running lights.....meaning tail lights and front parking lights?

Do your turn signal or emergency flashers work?

Have you checked the bulbs?


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post #4 of 7 Old 10-07-2009, 02:52 AM
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I agree a multi meter and check for volts at the bulb socket! Trace it back from there.

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post #5 of 7 Old 10-07-2009, 04:56 AM
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Check your wiring at the multi function switch on your steering column. Remove the switch and look at contacts on the harness and the switch, this is a known problem on these trucks. when the column tilts up and down it pulls on the wiring. Had to repair mine once cut the small tie strap that holding the harness this allows the harness to move freely. if the switch shows signs of overheating REPLACE IT!

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post #6 of 7 Old 10-07-2009, 08:44 AM Thread Starter
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It is definitely at a relay or the switch possibly. Could someone possibly indicate which relays to check as I have spares...

There is no way it would take out all bulbs on all corners including the trailer if it were a bulb issue. Also again the idiot buzzer doesn't come on as well - I actually left it in the running light position yesterday overnight by accident with no drain on the battery, indicating its something more serious. I'm missing my owner's manual so I'm sort of shooting blindly until I get another one.

thanks guys,
Andre

1999.5 Super Duty 7.3, Auto, Supercab Long Bed, 4" Exhaust, Air Bags, slight lift and 285 tires, stockish.
1969 Toyota Land Cruiser FJ55 Station Wagon, on a locked '94 Land Cruiser frame and suspension, Cummins 4BT, NV5600, built Dana 300, in progress...

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post #7 of 7 Old 10-08-2009, 01:58 PM Thread Starter
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Can I talk someone into looking at their manual and telling me which relays to check and which fuses?

thanks,
Andre

1999.5 Super Duty 7.3, Auto, Supercab Long Bed, 4" Exhaust, Air Bags, slight lift and 285 tires, stockish.
1969 Toyota Land Cruiser FJ55 Station Wagon, on a locked '94 Land Cruiser frame and suspension, Cummins 4BT, NV5600, built Dana 300, in progress...

www.4BTswaps.com Cummins diesel conversion community
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