Question about 2005 Nissan Altima

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Engine will start, when headlights turned on engine stops, dash lights only come on occasionally when ignition turned to on, when turned to start power is lost gauges go to zero. suspect a relay faulty but which one or computer faulty My 05 altima acts similarly. I took the battery out while the car was running and when I turned the headlights on the engine died. I was investigating a possible bad alternator or battery and it turned out my battery was fubar. I'd like to fix this issue though, as I have an idea it is the reason my battery was no good.

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  • Jordan Bowman
    Jordan Bowman Feb 23, 2009

    I disagree, I've taken batteries out of cars while running with working ECUs and had no problems..or are you referring specifically to Altimas? I mean, it runs fine until I turn the headlights on with no battery hooked up. With a battery it works normally.

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Your ECU is fried my friend. that sucks bad. You can only take out your battery while the engine is running on cars that don't have ECU's.

Posted on Feb 23, 2009

  • Zachary Kloefkorn Feb 23, 2009

    I know that it is possible to do so but it is very unlikely with newer cars that it won't pose a problem with your ECU. The only other solution that i can think of would be to follow the route on your dash where the headlight switch is and see if you can find a cut wire or possibly that the switch may not be grounded out right and is disrupting the whole dash.

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I have no power anywhere. i can jump solenoid and engine turns over but no fire. i suspect ignition switch but would that cause no power through out the car?


The fact that you can turn the engine but not get it to fire would suggest the battery is ok. The fact that you have no headlights, dash lights etc. would point to blown fuse/fuses. Even if the ignition switch was faulty you should still be able to switch the headlights on. I would check the fuses and the ignition switch wiring.

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I have a 2008 mitsubishi where the dash lights go out and the cars dies but I still have headlights and interior lights.


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Check out related help links with solutions to troubleshoot these problem.
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1 Answer

2002 hyundai elantra has a problem with erratic flickering dash/headlights


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Jan 03, 2012 | Hyundai Motor 2002 Elantra

1 Answer

Try to start. Dash lights, headlights etc. I get


You could have a start that has gone bad and will need to be replace,or your having a Passlock system problem.

Your Passlock may need to relearn the ignition keys, if the ignition lock has gone bad like my in-laws Grand Am Gt, here is what i did so they will not get stranded any more. Buy a Passlock by pass module for around $70.00. You can orderone from GMPASSLOCK.COM in the mean time try resetting the Passlock. Good luck

Ignition keys relearn takes about 30 min to do. 30-Minute Learn Procedure
1.) Turn ON the ignition, with the engine OFF.
2.) Attempt to start the engine, then release the key to ON; the vehicle will not start.
3.) Observe the SECURITY tell tale light. After approximately 10 minutes, the light will turn OFF.
4.) Turn OFF the ignition switch, and wait 5 seconds.
5.) Repeat steps 1 through 4 - two more times - for a total of 3 cycles of 10 minutes. 3x10 = 30 minutes.
The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch turn from OFF to CRANK Important: Turn the Ignition Switch OFF. The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
6.) Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password.
7.) With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.

Without a scan tool you may have momentary starter interruptions while history clears itself.

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1 Answer

Engine won't start. Dash lights flash rapidly when key turned.


the battery says 12 volts but may be dropping to 4 or 5 under a load...i would suggest jumpstarting the car and see what happens.the battery should read in the high 12 volts and not less than 9.5 under cranking. the dash lights go out on your car when starting,and the alarm will go off ,and disable the ignition if the voltage is too low in cranking the car because the computer will shut it down and activate the anti theft.....check your battery posts are tight. best of luck

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2 Answers

Won't start


There could be a short in or near the ignition switch.

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