2002 Cadillac STS has new battery. Security and theft system come up on screen to be checked, its not a constant thing. The car will not start, had it hooked up to mechanic computer and found nothing. Could this be a motherboard problem? What are your thoughts?

Asked by Dec 21, 2013 at 10:40 PM about the Cadillac STS

Question type: Maintenance & Repair

1 Answer

thoughts are INSUFFICIENT ground potential...from your battery or is it batteries...ya the black cable connects to the chassis/ground....right now you're on a "brown" connection...there are varying available amps and varying volts there now...you MUST take a wirebrush...take the connecting bolt off the lug at the end of the black 1/0 battery cable...wirebrush the lug holding it with a pliers so as not to damage it....then scrub the chassis until metal is realized....with this restored grounding to the components such as the fuel pump and ignition systems....oh and the greedy starter motor who's created this corrosion with the dis-similar metals pushin' 300 or more amps through the single spot there....If you're lucky there will be a second 1/0 black cable goin' to near the alternator...the block is where the starter is~

2 of 2 people found this helpful.

Your Answer

Cadillac STS Experts

  • #1
    tenspeed
    Reputation
    500
  • #2
    Js08016
    Reputation
    130
  • #2
    Tom Demyan
    Reputation
    130
View All

Related Models For Sale

Used Cadillac CTS
238 Great Deals out of 10,362 listings starting at $2,950
Used Cadillac DTS
48 Great Deals out of 1,505 listings starting at $2,975
Used Cadillac SRX
560 Great Deals out of 9,943 listings starting at $2,750
Used Cadillac XTS
138 Great Deals out of 6,296 listings starting at $7,500
Used Cadillac STS-V
32 listings starting at $9,900
Used Chrysler 300
322 Great Deals out of 19,326 listings starting at $900
Used Cadillac CTS-V
12 Great Deals out of 620 listings starting at $8,995
Used Dodge Charger
447 Great Deals out of 32,879 listings starting at $1,999
Used Cadillac Escalade
253 Great Deals out of 11,885 listings starting at $1,200
Used Cadillac ATS
172 Great Deals out of 7,797 listings starting at $9,999
Used Cadillac DeVille
6 Great Deals out of 1,516 listings starting at $1,999
Used BMW 7 Series
112 Great Deals out of 5,093 listings starting at $2,499
Used Chevrolet Impala
572 Great Deals out of 34,341 listings starting at $890
Used Cadillac CTS Coupe
32 Great Deals out of 787 listings starting at $9,999

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.