Boxster no electrical power at all

[PEzzo]

Hi to all. New member here. 2002 Boxster S race car lost all power. Checked following:
Battery checked, good 12.9 v, power goes to alternator , I changed voltage regulator anyway, checked all fuses including 80amp fuse, replaced ignition switch with URU from amazon, after multiple on off attempts I had lights on the dash but all dead after few seconds. The immobilizer is on the side and not getting wet, opened and checked, looked fine. also checked immobilizer fuse-ok. Well, don't really know where to look now. Has anyone here had similar issue?

[tonythetarga]

You might look at the long ground wire from the battery. Clean and reattach both ends.

[PEzzo]

Thanks for the reply. Will try.

[PEzzo]

Does the ground cable starts from the battery area and ends at the engine firewall? Trying to locate?

[tonythetarga]

I’m not sure of the route. I know a few guys in our PCA Region that had them replaced at a local shop. It is a PiTA procedure but it should trace back to a body part for grounding. Engine and trans also has a ground to the body. Maybe check that one first and then use a makeshift ground from the battery to a clean bolt or other steel ground.

[mikefocke]

To firewall, yes. I had to replace with a longer cable on a '01S when I changed to a smaller battery. Common autoshop cable, nothing special. Trivial if I can do it.

[PEzzo]

OK. Thanks

[PEzzo]

OK, everyone, I found the problem. The issue was the defective kill switch, when checked power to the main fuses it was zero amp. Strange, because I thought that was first thing I checked but I guess not.
Connected positive with the main fuse wire and car started like a champ. Thank you all for the help.

[Litesonic]

thanks for telling us the resolution... not everyone "gives back" so to speak.