1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Dome light short: no smart key or int lights...

Discussion in 'Gen 2 Prius Technical Discussion' started by navguy12, Mar 20, 2012.

  1. navguy12

    navguy12 Member

    Joined:
    Jan 20, 2012
    193
    32
    18
    Location:
    Batawa Ontario
    Vehicle:
    2008 Prius
    Model:
    N/A
    Help!!

    Putting in an LED into the dome light (over the back seat area) and my smart key system as well as my interior lights do not work.

    I couldn't even turn on my head-lamps until I put smart key into dash-board and now I get head-lamps when manually turned on.

    The fuse for the smart key is good and the other items on that fuse all work. Can't sort out what fuse would tie the smart key system to the interior lamp system, but those 2 systems are not working.

    I undid the negative wire from the 12 volt battery in an attempt to 're-boot' the car, but still no luck.

    I'm about to go on a test drive to see if I can actually drive the car....

    Again, I think I may have created a momentary short across the leads for the ceiling light bulb in the dome light as I was trying to install an LED with a festoon bulb adapter.....

    Thanks

    Cheers

    Mike
     
    #1 navguy12, Mar 20, 2012
  2. navguy12

    navguy12 Member

    Joined:
    Jan 20, 2012
    193
    32
    18
    Location:
    Batawa Ontario
    Vehicle:
    2008 Prius
    Model:
    N/A
    After my test drive, the "VSC" warning lamp is glowing on the dash-board....so no smart key, no stereo system, no interior lights and no VSC.......

    ....please pipe in if you think you know what it would be.......

    Thanks

    Cheers

    Mike
     
    #2 navguy12, Mar 20, 2012
  3. navguy12

    navguy12 Member

    Joined:
    Jan 20, 2012
    193
    32
    18
    Location:
    Batawa Ontario
    Vehicle:
    2008 Prius
    Model:
    N/A
    no clock...must use mechanical key to lock or unlock doors....

    ...have I fried my "Body ECU"?

    I ask because looking at my Bentley's manual, all these items tie together at the "Body ECU".

    Scan Guage II does work, I get my 'numbers' on my test drive....and it says 'no codes' and 'no pending codes'.

    Help....:(
     
    #3 navguy12, Mar 20, 2012
  4. koolingit

    koolingit Member

    Joined:
    Mar 17, 2009
    158
    50
    0
    Location:
    Mocksville NC, USA
    Vehicle:
    2009 Prius
    Dome lamp fuse in engine compartment fuse box?
     
    #4 koolingit, Mar 21, 2012
  5. navguy12

    navguy12 Member

    Joined:
    Jan 20, 2012
    193
    32
    18
    Location:
    Batawa Ontario
    Vehicle:
    2008 Prius
    Model:
    N/A
    I checked EVERY single fuse in this car. No fuses are blown.

    • no auto-dimming mirror
    • no Home-Link
    • no Smart Key
    • no interior lights
    • no exterior lights or headlights unless key fob in slot and power button pushed on
    • no power locks via power lock button unless key fob in slot and power button pushed on
    • no access thru rear hatch unless key fob in slot and power button pushed on
    • no clock
    • no stereo
    • VSC warning when car is driven
    • hybrid system works, AC works, electric steering works, multi-disply works
    :eek:
     
    #5 navguy12, Mar 21, 2012
  6. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,198
    6,464
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    It is hard to believe that some fuses are not out, given so many systems are not working. I hope that you used an ohmmeter to verify each fuse is good - do not rely upon visual inspection. Also note that the car has a fuse box under the dashboard as well as the main relay/fuse box near the inverter.

    If you still do not find a fuse problem, then I suggest that you obtain the electrical wiring diagram for your car from techinfo.toyota.com

    Then start with a simple system like interior lights or the clock, and work from that system backwards towards the 12V battery until you find where 12V power is available. That will be the point where that particular problem resides. Good luck.
     
    #6 Patrick Wong, Mar 21, 2012
  7. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,073
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    This is a fuse problem, regardless of the OP's comments to the contrary. Clear the short, if it still exists, and replace the bad fuse or fuses.

    Tom
     
    #7 qbee42, Mar 21, 2012
  8. navguy12

    navguy12 Member

    Joined:
    Jan 20, 2012
    193
    32
    18
    Location:
    Batawa Ontario
    Vehicle:
    2008 Prius
    Model:
    N/A
    100% correct. I rechecked the fuse I logically thought it should be, the 15 amp 'dome' with an ohmmeter and sure enough, it was blown......

    Thanks folks, new fuse in and all is well in my world again :)
     
    #8 navguy12, Mar 21, 2012
    1 person likes this.
  9. PriusFUN

    PriusFUN New Member

    Joined:
    Apr 13, 2015
    19
    6
    0
    Location:
    minnesota
    Vehicle:
    2008 Prius
    Model:
    II
    Can someone show me where to locate this fuse? I did the same thing!
     
    #9 PriusFUN, May 18, 2015
  10. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,693
    48,945
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    it should be in the fuse box under the hood, by the steering wheel. i believe the o/m shows it.
     
    #10 bisco, May 18, 2015
  11. PriusFUN

    PriusFUN New Member

    Joined:
    Apr 13, 2015
    19
    6
    0
    Location:
    minnesota
    Vehicle:
    2008 Prius
    Model:
    II
    Got it, thank you
     
    #11 PriusFUN, May 20, 2015
  12. Knightrider

    Knightrider Member

    Joined:
    Feb 21, 2019
    146
    34
    0
    Location:
    Kansas City
    Vehicle:
    2005 Prius
    Model:
    II
    Still fighting this exact issue on my car
    Started getting failed combo unit

    Updated to 06 w updated layout and mileage to go beyond 300000

    I am beginning to wonder if I have a wire between underhood fuse block to interior junction @ the drivers footwell

    I have no dome radio/audio vsc lamp is on no lamp on at the key slot no smart key functions
    Mfd displays no audio
     
    #12 Knightrider, Apr 20, 2019
  13. William Hutchinson

    William Hutchinson Junior Member

    Joined:
    Nov 4, 2019
    1
    0
    0
    Location:
    New Hampshire
    Vehicle:
    2008 Prius
    Model:
    Three Touring
    I have the same issue except my dome light fuse keeps blowing. What could be causing that?
     
    #13 William Hutchinson, May 25, 2020
  14. PNWbluegen2

    PNWbluegen2 New Member

    Joined:
    Dec 8, 2020
    2
    0
    0
    Location:
    Seattle
    Vehicle:
    2009 Prius
    Model:
    N/A
    Any luck with a resolution? I have the same problem.
     
    #14 PNWbluegen2, Dec 8, 2020
(You must log in or sign up to post here.)