Big 3-Now car is completly dead

1NonlyAccord · Mar 12, 2013

Did the "BIG 3" Upgrade,used 0 gauge pro wire and screw on terminals.

Car is completely dead reading 4.23volts at battery.

Ground from Neg to Frame.
Ground from Engine block to Frame.
Battery---100ANL----Alt.
**KEPT OEM Grounds intact also**

I took off the battery to Alt. wire and just kept the 2 grounds.
Car is on battery charger now,hopefully I dont need another Optima Redtop-itl be free but hassle taking it to oriellys.(2nd battery)

Any input?

Akingkhan · Mar 12, 2013

Do u have another battery u could throw on there?
It's kinda hard to not hook it all up right so I'm thinking the battery is the culprit

kn0x47 · Mar 12, 2013

well at 4v its not gonna crank. did it crank right before you upgraded the wires?

1NonlyAccord · Mar 12, 2013

No this is my 2nd optima(last replaced was last summer due to car sitting all winter in garage)

Yeah everything ran just fine,ONLY my AEM EMS would not start my car last week-had to plug OEM ECU up to move out of garage.Now its dead after sitting for a week.
Think I read the AEM EMS needs almost 14v to crank and operate.

schmiddr2 · Mar 12, 2013

Maybe a shorted connection or loose wire.

001Stunna · Mar 12, 2013

Check the wires you used for resistance using an ohm meter. Should be 0 or miniscule depending on the rating you pick on the meter. As long as you grounded on metal and not painted metal though thatll be fine most likely.

Your battery should be well above 12v. Could be due to sitting to long it died down. Leave it on the charger until it indicates a full charge and retry. If your charger has the option pick the slow charge method. Should read around 12.6/7 I think when full and charger turned off. If it dies down again quickly you may have a parasitic draw or bad battery.

1NonlyAccord · Mar 12, 2013

Its on the charger now.I will check when I get home from work tomorrow and see how long it lasts.Car sits in the garage-but has never had a complete dead battery before.

001Stunna · Mar 12, 2013

1NonlyAccord said:
Its on the charger now.I will check when I get home from work tomorrow and see how long it lasts.Car sits in the garage-but has never had a complete dead battery before.

Only thing that has killed my battery before is the winter plus alarm going off for like an hour in a parking lot. Last time I park close to construction site that kept setting the shock sensor off lol.

In your case, hopefully its just a random case and maybe the battery was down from the repeated tries you did before to swapping ecus as chasing a parasitic draw can be annoying having to go through everything one by one.

CG6Lemon · Mar 13, 2013

Can you link us the terminals you used and show a picture of how it was crimped? That is the most crucial part of doing the BIG 3 IMO. But I'm not positive if it's related to your weak battery readings. Be sure to sand down the front and back of terminal, the mounting points as well to ensure the top coating is shaved off and it's making a good connection to the mounting points.

gt58 · Mar 13, 2013

when i did my big 3 i noticed that when i had the terminal on the alternator the connection wasnt solid, it wasnt small enough to fit in that little plastic thing. i filed the plastic peice down so when i hooked everything back up, there was a solid connection going from the alt to the battery

Big 3-Now car is completly dead

1NonlyAccord

Well-Known Member

Akingkhan

Well-Known Member

kn0x47

Senior Member

1NonlyAccord

Well-Known Member

schmiddr2

Well-Known Member

001Stunna

Well-Known Member

1NonlyAccord

Well-Known Member

001Stunna

Well-Known Member

CG6Lemon

Detailing Enthusiast

gt58

Well-Known Member

Latest posts

Random media