Question about 2000 Pontiac Montana

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Flickering lights on 2000 Montana

Lights pulse when vehicle is running. I believe it to be a ground problem but don't know where to start.

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  • carson_rm Jan 06, 2009

    I also experience the same problem. ALL lights pulse, including the headlights, it is VERY noticable and happens at all speeds.

  • dave_6t5 Jan 15, 2009

    Mine is more prominent at idle or low speed. I had been informed it is caused by a defective alternator which sends a false message to the battery and charging system, this has not been confirmed though.

  • frozennorth Jan 18, 2009

    My interior lights and headlights also pulse, but are most noticeable at slow speeds.

  • bmrracing Mar 31, 2009

    I had the same problem when all lights in and outside of my van were flickering. It became so bad that at night if i was following cars they would pull over. Come to find out that is was my altenator. It was over charging. we put in a smaller one and it works fine now



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I had the same problem with my van, after taking it to the dealer they said it was not the alternator and could not explain the problem of the flickering. I'm not an electrical genius, but after i done some research of my own i learned it could be the diodes inside of the alternator. At this point I had 2 options, rebuild the alternator I had (with a one year warranty) or buy a remanufactured one (with a life time warranty). I chose to buy a remanufactured alternator and have had no problems with the flickering. Note: carfully inspect remanufactored alternator before leaving part store. I did not inspect part until pulling it out of box after 2 hours of knuckle busting labor to find out that new part had a busted housing.

Posted on Mar 02, 2009

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I have been told there is a ground wire under the hood that is used for the dash lights and has a problem about coming loose or corroded. Hope this helps.

Posted on Jan 06, 2009

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Do you have a alarm system malfunction? or is it a relay timer switch

Posted on Jan 04, 2009

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the service eng light is only that , you can shut that one off . look on youtubbe for your car easy to do , the ck enging light is a differant story , you can have a bad ground on your lights to cause the flickering shak the wires to the lights themselvers to see if that is your problem , ck also on yourtube for some of the problems you have

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My parents had the same problem with the dash lights on there Montana. After 7 trips into the shop we determined ourselves that there is a wiring harness that runs under the carpet on the drivers side in about the location where most people rest their left foot when driving. What was happening is the wires had worn through the insulated cover and was grounding out on the bare floor under the carpet. We were able to tape the wires and wrap them with hockey stick tape to prevent it from happening again. It is worth looking into.

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I have a 2000 pontiac montana and the lights are not working righ

If you live in a area in which salt is used on the roads, you probably have a corroded ground connection. These can be tough to find since there are several grounding points in most vehicles. When a ground fails, the current (the applied 12V) will find its own path to ground and can pass through different light bulbs on the way. If it was only the signal flasher creating problems, this can be caused by a single failed light bulb; the flashers are thermal devices and when the current is lower than it should be, the rapid flashing alerts you to the failure.
You might consider buying an after-market service manual from Haynes (my first choice) or Chilton. The manuals I have for our various vehicles give a general location for the grounding points; for example, 'Right side engine'

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Looking at a wiring diagram to see what all is involved in the starter electrical circuit for your vehicle .would be a good thing to do. Do you know what a wiring diagram is ? How to read one ? How to use a DVOM- digital volt ohm meter to test automotive electrical circuit's . Free wiring diagram here Enter vehicle info year , make , model an engine size. Under system click engine then under subsystem click on starting . Click the search button then the blue link. Testing the electrical circuit's is the way to find the problem .

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2000 Pontiac Montana Brake Lights.

the boards in the tail lights have issues the plugs melt and they screw up the grounds. if your dash light signal indicators or on steady at night then chances are you will need new harnesses and light board assemblies

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Flickering Lights

You do need an alternator. Nissan has a campaign on Maxima alternator in certain years such as 96-98 I believe. Go to your friendly Nissan dealer abd have them punch your VIN number into the NNA net. they will know and that will tell them if your vehicle applies by the VIN. I have seen the alternator on fire. There was fire inside of the alternator. Have it checked or the car can catch on fire.

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