Question about 2008 Ford F-150

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Ford 2008 F150-4.6 auto trans, column shift. Radio, mirrors, windows, gauges, dome lights quit. Headlights, tail & stop lights work. Battery 12.6 volts disconnected. 14.2 connected and running.

Is this a common problem? Has 160,000 miles. 1 owner, no accidents.

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  • Ford Master
  • 11,474 Answers

First Zach , you need to know how all this thing's work ! The gauges get info over serial data bus from SJB - smart junction box which gets the info from the PCM - engine computer . All this is designed to cut down on wiring , Coolant temp . fuel gauge sending unit , vehicle speed sensor , tach etc. are all inputs to the PCM .The PCM sends this info on the C.A.N. data bus where the instrument cluster microprocessor reads the data and moves the gauges ! The light's also are controlled by the SJB -body computer . The light's are PWM pulse width modulated - How to Diagnose Controller Area Network CAN The first place is to start by hooking up a diagnostic scan tool an check for DTC'S diagnostic trouble codes . The last Ford i had in my bay was a 2006 explorer . had this type problem , had U codes communication problems . Vehicle needed a new SJB $899 buck's an then it had to be programmed , another $300 .This is something you need to take to a qualified repair shop . Who know how it works and what to check and how to check it .
It could be as simple as a lose ground wire . But are you prepaired to take the instrument panel out to get to it .

Posted on Dec 08, 2016

Testimonial: "Jeff gave a very thorough and concise commentary on my problem. Much Appreciated!"

  • 8 more comments 
  • Zachary Patrick
    Zachary Patrick Dec 08, 2016

    Thank you Jeff. I'm not a mechanic, but this is roughly, the answer I expected. Obviously, I've checked fuses, battery connections, ect. I checked the instrument cluster plugs & sockets for moisture & corrosion. Also removed the cluster & peaked for the same things. $1200 isn't in the budget this week. I see others have bought clusters used & solved similar problems, but no one has mentioned the junction box. It must be pretty smart for $900. I'm guessing a code reader at O'Reilly of Auto Zone will tell the tale. Thanks again for your help!

  • Jeff Armer Dec 08, 2016

    The o'riley part store i don't know , autozone i do , there scan tool only will communicate with the PCM - engine computer ? Those prices i mentioned are ford factory parts . There are places on the internet where you can get PCM'S , BCM'S , SJB for a lot less . But the Programming is about $300

  • Jeff Armer Dec 08, 2016

    http://www.autoecmstore.com/

  • Jeff Armer Dec 08, 2016

    I'm just telling you the worst case scenario , doesn't mean that your ford needs all that ! Having it check for codes at a parts store may or may not lead you in the right diagnostic path .If they come up with a U code , this is for a communication problem !

  • Zachary Patrick
    Zachary Patrick Dec 08, 2016

    Just read the link to Diagnosis of can. Been down this road with Digital radio systems. I had no idea! This looks more like a dealer problem now. I assume the truck is safe to drive temporarily until I can get it into a shop?

  • Jeff Armer Dec 08, 2016

    Honestly i really don't think they have the tool that will communicate with the smart junction box . Well good luck and i hope it turns out to be simple .

  • Jeff Armer Dec 08, 2016

    You having any problems starting it ? And it runs ok ? A lot of these type problems turn it to the vehicle won't start , the engine won't crank etc...

  • Jeff Armer Dec 08, 2016

    A bad module will bring down the Data bus , no communication's between modules . These vehicle modules are so interconnected the littles problem will shut down the vehicle .I have seen a lose ground for a control module cause all kinds of electrical problems ! Tighten the ground and it's good to go ! Well again good luck !

  • Zachary Patrick
    Zachary Patrick Dec 08, 2016

    Starts and runs great, but "flying blind'"

  • Jeff Armer Dec 08, 2016

    That's not good , flying blind

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2008 F150 4.6L Auto trans. column shift. basic model. Instruments, interior lights, windows, mirrors & radio quit suddenly. Exterior lights,heater working. Engine starts & runs fine.


U need to check all fuses and flip around the relays... Check first/relay #1 then #32 if noting go on to #117 and #401...ur problem is in one of those fuses/relays...and they are located in the passenger side kick panel...theres a black cover over them and it has the fuses/relay numbers so it ain't hard to fine them...

Dec 08, 2016 | 2008 Ford F-150

Tip

Fuse list ford contour


The following specifications are for the Ford Contour and Mercury Mystique manufactured throughout 1995-2000.
Fuses Rating Color Circuit
Engine bay fuse box
1 80 Black Power supply to main fuse box
2 60 Yellow Radiator fan
3 60 Yellow ABS
4 20 Yellow Daytime running lights
5 30 Light green Fog lamp
6 30 Light green Not used
7 30 Light green ABS
8 30 Light green Air pump
9 20 Light bue PCM module
10 20 Light bue Ignition switch
11 3 Violet PCM memory
12 15 Light bue Horn & hazard flasher
13 15 Light bue Oxygen sensor
14 15 Light bue Fuel pump
15 10 Red Right-hand low beam
Passenger compartment fuse box
16 10 Red Left-hand low beam
17 10 Red Right-hand high beam
18 10 Red Left-hand high beam
19 7.5 Brown Heated door mirrors
20 10 Black Windshield wipers
21 30 Light green Electric windows
22 7.5 Brown ABS
23 15 Light bue Reverse lights
24 15 Light bue Brake lights
25 20 Yellow Door locks
26 20 Yellow Main light
27 15 Light bue Cigarette lighter
28 30 Light green Power seats
29 30 Light green Heated rear window
30 7.5 Brown Engine management
31 7.5 Brown Instrument pannel lights
32 7.5 Brown Radio
33 7.5 Brown Front and rear sidelights (left)
34 7.5 Brown Interior lighting & clock
35 7.5 Brown Front and rear sidelights (right)
36 30 Light green Air bag
37 30 Light green Heated blower
38 Unused
Relays Color Circuit Location
Engine bay fuse box
R1 Green Daytime running lights (Canada)
R2 Black Radiator fan (high speed)
R3 Blue AC cut-out
R4 Brown AC clutch
R5 Dark green Radiator fan (low speed)
R6 Yellow Starter
R7 Brown Horns
R8 Brown Fuel pump
R9 White Low beam headlights
R10 White High beam headlights
R11 Brown PCM power supply
Passenger compartment fuse box
R12 White Interior and courtesy lights
R13 Yellow Heated rear window
R14 Yellow Heated blower
R15 Green Windshield wiper motor
R16 Black Ignition
R17 Unused
R18 Black One touch window switch Driver's door
R19 Blue Cruise control cut-off Central fuse box bracket
R20 Unused
R21 Unused
R22 White Fog lights Interface module bracket
R23 Black Turn signals Steering column
R24 White Left-hand flasher Door lock module bracket
R25 White Right-hand flasher Door lock module bracket
R26 Unused
Bulbs / Lights Wattage Type
Low beam headlamp 55 9006 Halogen
High beam headlamp 55 9005 Halogen
Parking / Side light 5 2357A Wedge
Front turn signal 21 2357A Bayonet
Rear turn signal 21 1157 Bayonet
Tail light 21 1157 Bayonet
Stop light 21 1157 Bayonet
High mount stop light 5 2723 Bayonet
Fog/Driving light 55 893 Halogen
License plate 5 6418 Festoon
Reverse light 21 1156 Bayonet
Front sidemarker 5 2357A Wedge
Glove box
Map light 5 64111 Wedge
Dome light 10 6411 Feston
Step/Courtesy light
Trunk/Cargo area
Engine compartment 10 89 Wedge
Instrument-general
Automatic trans indicator

on Apr 15, 2015 | Ford Contour Cars & Trucks

3 Answers

2000 Pontiac sunfire won't start makes no noise when turn key over . headlights and radio work and dome light .. I have replaced steering column and ignition switch


This could be a couple different things causing your No-start condition. first thing I would check (Battery is good) access the starter solenoid, the small single wire connection is the start signal. Test for 12 volts here with DVOM or test light while someone turns the key. If there is 12 volts reading, the starter solenoid is defective. If there isn't 12 volts reading check all the fuses (with test light).
The second item causing the trouble could be the Neutral Safety Switch (Auto Trans) or Clutch Safety Switch (Manuel Trans) These could be open or out of adjustment.
Hope this helps you...

Jul 04, 2014 | Cars & Trucks

2 Answers

Fuse box diagram for 2002 ford taurus


The 1999 Fuse Box Diagram is as follows:

Column 1 (Top to Bottom)
Driver Window Relay
Interior Lamp Relay
Driver Unlock Relay
Battery Saver Relay
Hazard Lamps (15A)
Diagnos (10A)
Cigar (20A)
Front Wipers (30A)
Air Bag (5A)
ABS (10A)
Shift Interlock (5A)
Blank

Column 2 (Top to Bottom)
High Beams (15A)
Deck Lid Release (15A)
Mirrors/Antenna (5A)
Head Lamp Illumenation (5A)
Light Out Module (5A)
EEC Ignition Coil (20A)
Brake Lamps/ A/C (15A)
Instrument Illumenation (5A)

Column 3 (Top to Bottom)
Accessorty Delay Relay
Rear Defrost Relay
Tail Lamps (5A)
Battery Saver (10A)
Wiper and Vaps (5A)
Rear Wiper (15A)
Turn Signal (10A)
Air bag/ Alt LPS (A)
Starter Relay (10A)
Left Low Beams (10A)

Column 4 (Top to Bottom)
Switch Illumenation (5A)
Def Sw Illumenation (10A)
Stop Lamps (15A)
Radio (5A)
Radio Memory (5A)
Right Hand Power Locks (20A)
Gauges/ Warning Lamps (5A)
Radio Mute (5A)
Right Low Beam (10A)

Hope this helps.

Apr 19, 2009 | 2002 Ford Taurus

1 Answer

Gauges on the Dash went out


we had our gauges go out and you need to replace the circuit board (the gauges are all one piece and eazy to change your self) new it runs about 300-400 you can find them at a junk yard for about 75.

Mar 27, 2009 | 1997 Dodge Caravan

1 Answer

Gauges, Power Windows, Auto Lamps radio interior lights dont work


Sounds like an ignition switch problem, maybe even at the key.

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2 Answers

Electrical problem


I just had the same issues. No headlights, interior lights, power door locks, radio controls on steering wheel, or dash lights. Pulled every fuse in cab and under hood, not a one was bad. I disconnected the battery terminals for a few minutes. When I reconnected them every thing was working.

Jun 28, 2008 | 2001 Dodge Dakota

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