battery is good but car will not start. Check enging light is not on and when hooked up to auto scanner it will not scan

Asked by Aug 03, 2013 at 10:19 PM about the 2007 Pontiac Grand Prix Base

Question type: Maintenance & Repair

5 Answers

you need to wirebrush the battery cable at the point where it connects to the chassis ground...borrow a barbeque brush if you need to but coarse wirebrush it to expose the metal as every start will "Weld" the connection with great power of 300 amps and electrically fuse, leaving debris for an unreliable connection~....so disassemble the ground lug, wirebrush it clean...and the spot where it bolts to and tighten the bolt for a good ground connection...also the 1/0 cable that connects the engine to ground as this one also has to be able to put thru 300+ amps...Will heat the connections up and create corrosion...unfortunately~

clean the connections...if this isn't confusing the issue~

the positive side of things also has a 1/0 RED cable that goes to a starter solenoid...take a look at that connection and wirebrush that side too...if necessary~

are we on the same page? in the same building? on the same planet here?

68,675

Check for an ECM fuse. It may be blown. Since the PCM (Powertrain Control Module) won't communicate with the scan tool it sounds like the PCM is "dead". The check engine light should be on with the key in the run position but the engine not running. If not, this is another good indicator that the PCM isn't getting power. Some GMs have a single fuse hidden under the dash for this. HTH. -Jim

Your Answer

Add photo

Related Questions

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,834 nationwide Grand Prix listings starting at $1,700.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,350
#2 Tom Demyan
Tom Demyan
Reputation 2,950
#3 munron
munron
Reputation 2,290
View All

Related Models For Sale

Used Chevrolet Impala
557 Great Deals out of 35,581 listings starting at $899
Used Dodge Charger
532 Great Deals out of 28,515 listings starting at $2,500
Used Pontiac G8
16 Great Deals out of 356 listings starting at $4,990
Used Ford Mustang
706 Great Deals out of 44,428 listings starting at $1,500
Used Pontiac G6
75 Great Deals out of 4,067 listings starting at $1,975
Used Chevrolet Monte Carlo
12 Great Deals out of 1,424 listings starting at $2,400
Used Pontiac Grand Am
4 Great Deals out of 1,139 listings starting at $1,000
Used Chevrolet Malibu
1,177 Great Deals out of 79,465 listings starting at $2,500
Used Pontiac GTO
6 Great Deals out of 474 listings starting at $6,995
Used Nissan Maxima
331 Great Deals out of 24,189 listings starting at $1,999
Used Nissan Altima
1,267 Great Deals out of 74,640 listings starting at $1,000
Used Chrysler 300
375 Great Deals out of 17,993 listings starting at $1,000

Used Cars For Sale

2008 Pontiac Grand Prix Base For Sale
7 Great Deals out of 359 listings starting at $1,700
2007 Pontiac Grand Prix Base For Sale
13 Great Deals out of 287 listings starting at $1,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.