I reversed the polarity when installing a new battery in my Z (I know, shithead mistake but I’ve forgiven myself) When connecting it properly, I noticed to have all electronics working, including radio and fuel pump, until the moment I turn the key to crank the engine, then all power cuts out and returns a few moments later when I’m not looking. I pulled my ecu and nothing looks fried, and ran a test light on my fusible links, which all seem to be receiving power (unless it’s the grey link that’s removable, in that case I’m not sure how to test, but the diode going to it gets power)
Could it be the grey link? Alternator diodes? Starter? ECU?
Could it be the grey link? Alternator diodes? Starter? ECU?
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