Interior Lights not working - Ford Powerstroke Diesel Forum
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Old 06-18-2012, 10:13 AM
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Interior Lights not working

I have a 2002 F250. The interior lights and cargo light will not go on. Reading lights work fine. I am getting 12 Volts on Fuse 35. I do not get any voltage at the light sockets.

The 'roller' Switch has a Blue, Orange, Black and Brown wire on the wire harness that plugs into the roller switch. I get 12volts only on the orange wire with it disconnected and when connected. So I seem to have power to the swtich.

When I turn on the headlights, the Blue wire now will give 12volts and roll down to 1volt as I roll the switch down (to dim the dash lights I'm guessing). And the Brown wire will give a constant 12volts with the headlights on. I'm going to guess this is the ding ding ding sound I hear to let me know the lights are still on since I do not get the ding ding ding with this specific harness disconnected. (the headlight harness has stayed connected to the headlight switch throughout this test)

So this would leave me with a 'dead' black wire. Maybe? Should this be putting out any voltage at any point which might mean my switch is bad OR is this a ground wire and never see voltage. Which means my problem is somewhere else. Any ideas? Could I jump any of these wires to see if the lights will go on? Schematic anyone?
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Old 02-06-2013, 06:25 AM
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light issue

Just wondering if u fiqured out your problem with the interior lights I have the same problem any help will be greatly appreciated
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Old 02-06-2013, 06:41 AM
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The interior lights are controlled through a relay in the instrument cluster. Mine is starting to go bad too and sometimes my lights/radio will not come on for several minutes after I start driving. Everything I have found states that a new cluster has to be purchased.
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