Hi Guys,

I have an unusual issue, in my 1999 TL the battery died so I
tried to jump it using an Enclave but the car won't jump and the
output from the Enclave drops to zero when connected to the TL.

I even tried connecting to the TL without the battery in the TL and still the Enclave drops to zero. I removed a fuse panel cover by the firewall on the passenger side and located what I believe is the master fuse.

I have continuity across both terminals as well as the smaller fuse of the same type next to it.

What can be the issue here?

 

You have a short in the TL that you have to track down. Start at the battery and measure all the ground lines at the fusebox, then go to the positive terminals and see what you have. You can do this with the battery disconnected....just "pin" one side of your meter to the positive battery terminal (with no battery connected) and then start probing around with the other side of your meter (meter set to Ohms or Diode mode) to see where you have connectivity. I suggest you start with ground because it is most likely that you'll find that short first (since your battery has drained....you have a short to ground).

Since it's two weeks later - what happened?

dd