Battery in Trunk wiring completed, now no power at all

MrBelvedere2 said

Ok I was able to work on it a little bit today, did some tracing with the meter. Ground is good, has power to the cut-off switch and power to the solenoid. It also has power feeding the car at the starter relay. The ammeter has power on both sides in the dash although it is disconnected from the alternator and a dedicated wire is running from the alternator back to the solenoid in the trunk. No headlights, no dome light no brake lights, nothing seems to have power. The only thing does seem to have power is the windshield wipers, they seem to work fine, which I find odd. Any ideas? Thanks

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I would check what KitCarlson said if you did not.

I know you said you ground battery to rear frame rail, and the engine is ground up front. I was told/taught to bring ground wire (2G or bigger) from the battery to the front to the engine, firewall and the frame up there.

I ran two grounds - one like you in truck to rear frame rail and another to firewall stud. To that stud on the inside I ran lines to firewall, metal dash and frame. In engine compartment I have engine ground straps (both heads and block). Maybe overkill, but "you can never have enough **** ground" was beaten into me. Lol

The lights that aren't working are body ground, aren't they? Maybe the ground to just the rear frame rail isn't suffice. I would think a quick check with rear brakes by running temp wire from - battery terminal to light bulb body socket to ground frame there may validate it .

I'm no expert - just trying help from what I've learned.