Wont start after 120k tune up

[5speedSHO]

Well we put the sho back together, did plugs, wires, some gaskets and a few other things.... but Its acting like it has a dead battery, needless to say we litterally went out and bought a new one right before we started it... and its acting like its dead, lights dim, it engages but doesnt start.... barely can turn on the dash lights.... etc etc etc.

Any ideas what this could be. We tried jumping it before also with no avail
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[SASHO91]

have you checked ALL of your grounds?

 

[ohfosho]

yes check all grounds and then get the battary tested.

 

[5speedSHO]

battery is new, old battery did the same hooked up with jumper cables and charger (not at the same time). the battery cables dont look great, gonna fix that today. hopefully it isnt an ecu or something because the ignition was on and we went to jump it and my friend put the wrong cables in the wrong spots causing a small spark before he realized it.

we'll see