Help! Integra won't turn over unless i get a jump.

I have a leak on the passenger side That I was going to fix this week but the rain beat me to it. Not sure if some water got under the dash and messed some stuff up.

So I go to my car after work and turn the key and no dash lights came on. Then I tried turn the key again and the lights came on then it started clicking like the battery was dead and I thought the clicking was coming from the right side of the dash at first. Everything in the car works windows radio ect. So I got a jump and it started up. I drove home then tried to start it again and it did the same thing no lights on the dash no power at all. So I take my optima out my next integra and try that battery same thing. But when I hook it up to my other car for a jump it starts up.

I reset the ecu and checked the battery terminal since it was raining I didn’t play with too much stuff. Not sure if a relay or something is gone.

UPDATE
I cleaned up the battery terminals and the starter. Now when I put the key in i have power but once i try to turn the car on I her the starter shoot out and the dash light and radio turn off. Car still doesn’t crank. I switched out my icu on sunday maybe a wire is got loose under the dash.
Anyone ever had this problem?

sounds like a ground try using a jumper cable to add a ground from battery for an easy test

i’ll try it when i go home

i agree. check all grounds cables. the one under the battery tray is highly susceptible to corrosion

I pulled my optima out my other DA its charging right now. I’ll check that ground out and change they terminals cause they are in bad shape.

PROBLEM SOLVED!!!
The battery terminals were the culprits. Changed them and the CAR STARTED RIGHT UP.