Last weekend I swapped a B20vtec into my 91 dx hatchback with a rywire obd1 harness. The car starts up fine but after 1-2 minutes the headlights will die, rpm stops working, cluster starts dimming and eventually the car will just die. After the car dies it won't crank over anymore only with a jump start and I've made sure the rywire alternator wire is secured to the alternator and fuse box.

I checked all my fuses, redid all my grounds(battery ground, tranny to chassy, valve cover to chassy, tighten harness ground to thermostat), got a new battery, replaced alternator with a known working one, new dizzy but it still dies. Any help will be appreciated!

 

main relay checked/tested?

 

I pulled it off about a month ago and all the solders look fine.

 

test it.