no power but full battery

[tristan89]

i just got my ECU back from the tuner on my sr20det, i put it in (negative disconnected from the battery) then i texted the battery i have full volts, hooked up the ground and it shows i have no charge on my battery and when i turn my ignition to the 3rd notch non of my lights or anything turn on, any idea why?

[anti tyler]

You've got something unplugged on the harness. There's no way your battery is plugged in but not giving voltage to the car.

[tristan89]

MAF sensor is unplugged could that be a problem?

[tristan89]

before i took the ECU out i could put my key in and turn on my lights and play music and everything electrical worked fine

[scott883]

You should try checking grounds , checking fuses and so forth.

[ultimateirving]

YOu probably didnt tighten the ecu down properly when reinstalled, double check all the connections in the kick panel

[racepar1]

Check the 75 amp main fuse in the engine bay fusebox, or 100 amp is it's an S14. The ECU does NOTHING to power ANYTHING on the car, it simply runs the engine.

[goldens14]

Check the fusible links

[Vegass13]

check the alternator fuse like racepar said...if that's blown the only things that'll work are headlights and like the clock on the tach

[adams 02rs]

Check the 75 amp main fuse in the engine bay fusebox, or 100 amp is it's an S14. The ECU does NOTHING to power ANYTHING on the car, it simply runs the engine.

Bet This is your problem. Maf doesn't have any thing to do with your battery not completing a circuit.. Also check grounds, and make sure your alt and starter harnesses are properly grounded, and see if connectors have been connected. If all checks out then its your 75a alt/batt fuse.

[adams 02rs]

check the alternator fuse like racepar said...if that's blown the only things that'll work are headlights and like the clock on the tach

In some cases, Sometimes the clock wont even work lol. Try turning on your headlights and report back. Bet its the 75/100a

Also check and see if your battery light comes on when the ignition is in the auxiliary "3rd" position and let us know.