Question about Pioneer DEH-P8000R

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Cannot get it to switch off so it drains my battery

Cannot switch the unit off, unless I completely remove it from the dashboard. How do you turn it off completely?

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  • Paul Hutchinson May 11, 2010

    When connecting the head unit, did you wire the red to battery live and the ignition live to ignition live(normally yellow)

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  • 3 Answers

Is there a button problem?

Posted on May 23, 2009

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1 Answer

Battery drains and the dashboard lights will not turn on.


There is most certainly something draining the battery in the car. I would start with all of the door and interior light switches. Then to items like the radio and fans. I personally had found that my blower fan for the heat/AC was not turning off in my truck causing it to drain. If you have a rear wiper motor that is also suspect. Keep posting as you find things out.

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Draining Battery


Check the alternator. You can observe your interior dome light or the vehicle headlights as you rev the engine. If the light intensity changes with as the RPMs of the engine changes, then you have a faulty alternator.

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Will leaving the light switch turned on, while the car is off drain the battery? (Knob on the Dashboard, to the left of the steering wheel)


yes, any electrical device left running in car will drain battery, not unless you are running the engine for it will continue to charge the battery, regarding the idle setting issue, have a qualified mechanic check and adjust your clutch idle setting to fix your problem.

Mar 22, 2014 | 2000 Mercury Grand Marquis

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I believe that there is a short in the switch that turns on the dome light


The interior lights and dome light are all operated by connecting the white/ground wire to the frame or body of the vehicle. There's always power to the lights but connecting the ground makes the circuit, complete and lights on. Until you can get a chance to repair the switch, just take all the interior light bulbs out so they won't drain your battery. That's not a repair tho, it's only temporary.

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Laptop is not switching on


The Lenovo maybe damaged beyond repair.
You should not have turned on your Lenovo and imediately removed the battery then drained the water and place the Lenove in a warm dry place for several days to make sure it was completely dry, then take it to a computer repair shop and get them to check out the Lenovo.
I suggest you take it to a computer repair shop, they may charge you for a quote unless you go ahead with the repair.
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How do i remove a heater core on a 2001 grand cherokee


The heater core on your 2001 Jeep Cherokee is responsible for providing heat in the cab of your vehicle. Overtime or due to driving conditions, the heater core can become plugged with dust or corrosion and stop working. If it is not working properly, the heater in your Jeep will not warm the interior and could cause the windows to fog over. To avoid this, if you start seeing signs that the core is not working properly, you can remove it yourself in about 2 or 3 hours and save yourself the expense of having someone else do it.

just follow these steps:
  • 1

    Detach the negative and positive battery cables from the battery of your 2001 Jeep Cherokee with an open end wrench and crescent wrench.

  • 2

    Remove the cap from off the radiator and also from the top of the coolant overflow tank on the passenger side of the Jeep. Locate the drain valve at the base of the radiator and place a drain pan on the ground, below the drain valve.

  • 3

    Open the drain valve on the radiator with an open end wrench and allow the coolant to drain into the pan completely. When it is finished, close the drain valve and remove the drain pan.

  • 4

    Unfasten the dash pad on the top of the dashboard by using a screwdriver to undo the screws holding it in place. Check the defroster vent and remove any screws holding the vent screen in place.

  • 5

    Remove the trim panel underneath the passenger side of the dashboard with a screwdriver and set it aside. Locate the plastic box that is sitting underneath the dashboard on the passenger side.

  • 6

    Undo all the screws that are holding the plastic box in place with a screwdriver and set the box off to the side. Locate the heater core that was sitting inside the plastic box.

  • 7

    Unscrew all the screws that are holding the heater core to the firewall with clamps underneath the dashboard. Remove the clamps from the heater core.

  • 8

    Lay a piece of plastic sheeting on the passenger side floorboard to cover the carpet from any coolant remaining in the heater core. Pull the heater core away from the firewall until you see the hoses attached to the inlet and outlet pipes on the unit.

  • 9

    Remove the water hoses from the pipes on the heater core by unscrewing the hose clamps with a screwdriver and sliding the hoses off the pipes.

  • 10

    Take the old heater core out of the Jeep Cherokee and dispose of the unit. Recycle the drained coolant by taking the drain pan with the fluid to your local recycling center or automotive supply.




  • Dec 06, 2011 | Cars & Trucks

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    Short battery life with imix system


    It is important to turn off the battery when not in use... they may have a switch OR often when you plug the guitar cable into the unit that completes the circuit to the battery. Another thing the 9 volt batteries are not the greatest. With continuous pwer I would expect the battery to last a couple days. Remember that the devices that have a pushbutton to alternately turn on the device DO still place a small current drain on the battery... For those devices REMOVE the battery when unit is be idle for a week or more.

    Feb 12, 2011 | L R Baggs Lr Baggs Imix / I-mix Acoustic...

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    Car shut down complete..wont turn back on.


    If cars shut down dead completly and no lights on dashboard, or emergency blinkers would come on at all, then it's your battery. It's drained completly from leaving something on like lights.. etc. If you were driving and then you stopped and turn your engine off, and then when turning engine back on and you get nothing compleltly... thens it's a faulty connection, check your positive connection if it's connected tight and securely and free from acid corrision built up from the battery terminal or the clamping itself. Check your negative connection to see if it's seated and securely tighten to the battery terminal and has secure contact to a grounding part. Also check your postive/negative wirings that connected to the battery to see if it broken/torn. If any of these is presented, then correct it. Should work, and now if you do get lights on your dashboard/ but dimmed when attempting to start and engine slow to roll over or no roll over followed by clicks, then your battery drained and doesn't havn't the requirng crank amp needed to start the engine. If battery good and car won't start. Please described what you hear and what you do, so we can help you better.

    Jan 24, 2011 | 1996 Honda Accord

    1 Answer

    My heater is not working what do i need to replace??


    First check blower motor, possible go to bad or no power to it check fuses blower switch blower motor.

    Try this procedure to remove this device...
    1 Detach the negative and positive battery cables from the battery of your 2001 Jeep Cherokee with an open end wrench and crescent wrench.
    2 Remove the cap from off the radiator and also from the top of the coolant overflow tank on the passenger side of the Jeep. Locate the drain valve at the base of the radiator and place a drain pan on the ground, below the drain valve.
    3 Open the drain valve on the radiator with an open end wrench and allow the coolant to drain into the pan completely. When it is finished, close the drain valve and remove the drain pan.
    4 Unfasten the dash pad on the top of the dashboard by using a screwdriver to undo the screws holding it in place. Check the defroster vent and remove any screws holding the vent screen in place.
    5 Remove the trim panel underneath the passenger side of the dashboard with a screwdriver and set it aside. Locate the plastic box that is sitting underneath the dashboard on the passenger side.
    6 Undo all the screws that are holding the plastic box in place with a screwdriver and set the box off to the side. Locate the heater core that was sitting inside the plastic box.
    7 Unscrew all the screws that are holding the heater core to the firewall with clamps underneath the dashboard. Remove the clamps from the heater core.
    8 Lay a piece of plastic sheeting on the passenger side floorboard to cover the carpet from any coolant remaining in the heater core. Pull the heater core away from the firewall until you see the hoses attached to the inlet and outlet pipes on the unit.
    9 Remove the water hoses from the pipes on the heater core by unscrewing the hose clamps with a screwdriver and sliding the hoses off the pipes.
    10 Take the old heater core out of the Jeep Cherokee and dispose of the unit. Recycle the drained coolant by taking the drain pan with the fluid to your local recycling center or automotive supply

    Keep us updated.

    Dec 02, 2010 | 2001 Jeep Grand Cherokee

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    How to replace heater core 93 honda del sol


    Heater Core Honda Civic/CRX/del Sol 1984-1995 Repair Guide REMOVAL&INSTALLATION
    See Figures 1, 2 and 3
    REMOVAL & INSTALLATION
    1. Disconnect the negative battery cable and disable the SRS system (if equipped.)
    WARNING All SRS wire harnesses are covered with a yellow insulation. Read the SRS precautions found in this section and install the short connectors as described.
    1. Properly drain the cooling system.
    2. Disconnect and plug the heater hoses at the firewall.
    3. Disconnect the heater valve control cable.
    4. Remove the heater unit attaching nut on the firewall.
    5. Remove the dashboard as follows:
      1. Remove the center panel.
      2. Disconnect the wire connectors at the fuse box.
      3. Disconnect the sunroof switch connector, if equipped.
      4. Disconnect the ground cable at the right of the steering column and the power mirror switch wire connector.
      5. Remove the side air vent knob and face plate.
      6. Remove the screws attaching the air vent control lever.
      7. Remove the center panel, radio and heater control head.
      8. Remove the gauge upper panel (4-door) or instrument panel (3-door).
      9. Disconnect the speedometer cable.
      10. Remove the center upper lid.
      11. Remove the side defroster garnishes on both ends of the dash.
      12. Lower the steering column.
      13. Remove the dashboard mounting bolts.
      14. Lift and remove the dashboard assembly.
    6. Remove the heater duct.
    0900c15280061a21.jpgFig. 1: Removing the heater duct assembly
    1. Remove the steering column bracket and duct assembly.
    2. Remove the heater assembly mounting bolts.
    3. Remove the heater assembly and remove the heater core.
    0900c15280061a22.jpgFig. 2: Removing the heater case assembly 0900c15280061a23.jpgFig. 3: Removing the heater core from the heater caseTo install:
    1. Install the heater core into the heater unit.
    2. Install the heater assembly and the attaching bolts.
    3. Install the heater duct and steering column bracket.
    4. Install the dashboard assembly. Tighten the mounting bolts until just snug.
    5. Raise and attach the steering column.
    6. Install the center upper panel.
    7. Connect the speedometer cable and install the instrument gauge assembly.
    8. Install the control head, radio and center panel.
    9. Install the side vent and face plate.
    10. Connect the ground cable at the right of the steering column and the power mirror switch wire connector.
    11. Connect the sunroof switch connector, if equipped.
    12. Connect wire connectors at fuse panel.
    13. Install the heater unit attaching nut on the firewall.
    14. Connect the heater valve control cable.
    15. Connect the heater hoses at the firewall.
    16. Connect the negative battery cable.
    17. Fill, bleed and leak check the cooling system.

    Sep 01, 2008 | 1996 Honda Accord

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