Amp meter bypass is a fix of the few that should be done. Even with a new harness. The other stock high current loads are the headlights. Headlight relay circuit. Fan motor for climate control or change, Rear defroster, power windows. At that point there should be a small aux fuse box under...
Since you have power to the engine compartment, we'll say the grounds are good. Need to see how you have + connected. Is there a fusible link? The below is a guess of your problem until it is known how it is wired.
Before you start tearing into things. Check to see if you have power at the fuse...
Clean the battery terminals so the shine like a new nickel. Fuse able link start there. move it around see if things come on. Then the bulk head connector. then the plug under the steering column. Check battery grounds.
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If it's been like that. The CUDA will be on a feeding...
Having the money and the time at the same time is always the two biggest hurdles. The patience is a test of of time not to hurry through and get it done the way it should be. Thanks for showing us your excellent work.
Ignition switch maybe yes maybe no? Ignition sw plug under the steering column loose? bulkhead connector loose? Spade connectors on resistor and coil loose? Mounting screws for ECU bad connection.
Hot wire it again. it can be done with the bullhead connector under the hood disconnected.
To...
When your mother cares for you she will protect you with her last breath. (When your not sure what the arm swing result will be.)
But you know better not to cross her. And you learn to smile and keep your mouth shut. If your don't you will be on the receiving end of the belt to teach you a...