azmalu1

This has only been over the last two days but I had noticed the crank taking longer a few weeks ago. I have a brand new battery and starter. I had all three tested last night. Battery starter and alternator passed basic auto zone test. I also did have aftermarket stereo rewired and I'm wondering if it's related to what fuse they tapped off of.

thoiboi

Check your ground cables and positive battery cables to make sure they aren't corroded. Clean the terminals with a wire brush and reattach.

nmtsw20

If it happened after the aftermarket stereo was then it could be a parasitic draw. That is when electrical components pull current when they are not supposed to, so when the car is parked over night or extended periods of time, it drains the battery. You can do the test with a multi-meter, there are tutorials on Youtube.

azmalu1

I truly have a feeling thats what its related too. In the past my sub would turn on when the key is sitting in the acc position but it no longer is. That makes me wonder if the remote wire for the sub is set as constantly on. The strange this is I can go a week without it then it can happen on my lunch break at work. Not on my drive home but then again the next morning. Its not consistently happening every day. No other explanation right?

btw what should I be checking with a multimeter? I have one but dont even know what to check on youtube.