Question about 2002 Pontiac Grand Prix

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I have a 2000 pontiac grand prix gtp that i just had a new altenator put on because i was told there was a short that was causing my lights interior and exterior to flicker now that the new one is in when i use the brake all the lights interior and exterior come on and when i use the left turn signal only all the lights blink with the turn signal inside and out and when i actually turn my headlights on the left turn signal doesnt work just stays lite up no blinking WHAT THE HECK DOES THIS MEAN?

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  • Pontiac Master
  • 12,142 Answers

This means you have an electrical problem ! An without doing some testing with a volt meter an looking at a wiring diagram to isolate the circuits from the ones with the problem i would be guessing , just like anyone else on here would be doing . Do you know how to do automotive electrical testing ? How to read an use a wiring diagram .It is true a bad diode inside the alternator can cause excess AC voltage ripple , causing lights to flicker ! If i were to guess i'd say there is a ground issue and voltage is back feeding through one of the lamp circuits . But also looking at a wiring diagram i see the brake light switch feeds B+ voltage to the center high mount stop lamps and to and through the turn signal switch .to the right and left lower stop lamps . Pontiac grand Am's had multifuction switch problems that caused similiar problems . Check the grounds first , do you know what a body ground is .
Watch this training video .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
Electric Testing Techniques You Need to Know
You can find free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size > Under system click on lighting ,then under subsystem click on exterior lighting , click the search button then the blue links .

Posted on May 25, 2017

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Posted on Jan 02, 2017

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SOURCE: Flickering Headlights and Dim interior lights

Definately an electrical problem....first off, check the battery and alternator connections to make sure they are tight. The problem has to be before the fuse box because the headlights and interior lights are on different fuses. It sounds to me like a loose wire, corroded battery terminals, or an alternator that is going bad. An alternator is a relatively easy and cheap fix. They cost about $100 and require removing a few wires, 3 bolts, and the serpentine belt.

Posted on Jul 27, 2008

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SOURCE: how do you replace the blower motor in a 05

http://lmgtfy.com/?q=replacing+blower+motor+in+grand+am+05

First link

Posted on Feb 19, 2009

  • 42 Answers

SOURCE: 04 pontiac grand prix wont start.

first remove the battery and take it to a auto parts place and have them check it. move on from there. if the battery is good the do a starter draw test. take a meter and hook it to your battery. now have someone try and start the car. if the voltage on the battery drops from 12.8 to below 9 volts then the starter is bad. if the voltage doesnt drop much at all then its prolly the solenoid both of which require starter replacement since most solenoids are on starters. if still nothing then check ignition switch. but before anything else ensure vehicle is in park. if it is in part use a meter to test neutral safety switch.

Posted on Mar 20, 2009

joecoolvette
  • 5660 Answers

SOURCE: my turn signal lights wont work on my 95 firebird formula

Go under the dash on the drivers side, and locate the two flasher stat units. These are small round aluminum 'cans'. They plug in, and have flat blades on the bottom. (You of course won't see these flat terminal blades until you unplug them)

One is for the turn signals. One is for the four way flashers. I can't tell you which one is which.

Past this point, check all the grounds for the turn signals. The wiring harness at the front will have one, or two leads, (Wires), coming out that bolt directly to metal. Either sheet metal for the car, or to the frame. These leads have flat, round terminal ends on them, with a hole in the middle of the terminal.

The lead's terminal end bolts can work loose causing a bad ground, and/or, there could be corrosion in-between the terminal end, and the area of metal it bolts to. If so, use sandpaper, and clean the terminal end, plus the area of metal it bolts to.

There are ground leads, (Or lead), that come out of the rear wiring harness also. Check these.

Still no?
Then your turn signal bulb sockets have corrosion in them. This causes a bad ground.

You may be able to use a rolled up piece of sandpaper, and clean the socket.
(Also touch up the lead, {LED. As in the metal lead}, contact point in the middle of the socket. This is for the Positive connection, but it doesn't hurt to clean it while you're there.

After this is the turn signal switch in the steering column.
(My money is on a bad flasher unit)

Posted on Jul 14, 2009

mlapres
  • 757 Answers

SOURCE: check engine light stays and blinks

Sounds like it is misfiring.
Try changing the spark plugs and you MUST run premium fuel.

Posted on Dec 27, 2009

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