no speedometer or tach reading, no power windows... - Ford Powerstroke Diesel Forum
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Old 01-05-2013, 01:15 PM
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no speedometer or tach reading, no power windows...

working on a buddys 06 f250 with the 6.0. he went to start it this morning and notices he had no cluster illimination, no tach or speedo readings, no power windows, no interior lights, no radio and probably a few more powerless components im forgetting. We pulled all fuses that seemed even hardly relevent but couldnt track down anything. Ive done some searching with very few results. Truck starts fine, all exterior lighting works, radio has power( if you hit eject it works). It seems like im missing acessory power, but then again ill get dash lights such as airbag and what not like you normally would with the key in the run position. Also, wipers and power locks work fine. Thanks for any input!

Last edited by 9473idiford; 01-05-2013 at 01:22 PM. Reason: more info to add haha
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Old 01-05-2013, 02:07 PM
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and also, we just drove it to seem if it would change any, it lags hard and surges under acceleration. how could this all be tied together? also, its dark out now, and i realized the cluster illumination does work, but not a single gauge. just lights up
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Old 01-05-2013, 03:10 PM
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I had the same problem about a month ago with my truck and its an 06 too. It freaked out with the same symptoms over and over for 2 days straight then all the sudden went away. I was told it was some kind of power relay but not sure which one. If i find out, i will let you know.
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Old 01-05-2013, 06:59 PM
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The IC(Instrument Cluster)supplies the PCM with the fuel level input.When the IC is inop the PCM doesn't receive a fuel level input so it assumes the fuel level is 0% and a DTC P115A(Low Fuel Level-Forced Limited Power)is stored.When this DTC sets the PCM operates the engine in a reduced power mode to protect the injectors from low fuel pressure.When the IC issue is resolved,the loss of power will be repaired as well.Im gonna look at some wiring diagrams and reply with my advice on what to check.
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Old 01-05-2013, 07:12 PM
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You need to check the IC powers and grounds first.All of your inop components are powered by the Battery Saver Relay which is internal to the IC.It is not serviced separately.Check fuses #2,33,35,41&45 in the CJB(fuseblock below steering column)first.If they are all good,you'll have to remove IC to check for powers and grounds at the IC connectors.Good Luck.
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Old 01-05-2013, 09:48 PM
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Make sure the connectors on the Instrument Cluster are seated properly.

If you ever pull out the cluster, you get the same symptoms as soon as you pull the connectors...


Lee
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