1st time posting here.
I own a 2000 TL

So I've replaced the starter a couple of weeks ago and replaced the alternator just a couple of days ago. I have a Optima Red Top that is good. BUT, I am still getting the loud clicking sound from around the starter when I try to start it. The thing I'm not understanding is that when I put a jump pack to it, it starts pretty much right away.

Why won't it start without the jump pack?????

What am I missing????

 

How do you know the battery is good?

 

Because I have tested it with a multimeter several times

 

and what was the voltage?

when changing out the components, did you check cables for corrosion? ground cables included.

 

You have to load test the battery just checking the voltage wont help

 

I like the check the grounds answer.