1990 Dodge Ram Van B250 Questions

Unanswered 1990 Dodge Ram Van B250 Questions

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Well when I open the door close it the parking lights blink twice now my dash light are blinking as if the emergency lights are on it still is blinking with no key on 1988dodge ram vanb250v8
No power to headlights, brake lights, running lights dash lights and power door locks. I'm thinking fusible link. Isn't there a schematic out there for fusible links only with their location?
About 3 times applying brakes caused headlights to slightly flicker. Next time flicker, dim to yellow and went out. Now no headlights, running lights, dash lights, brake lights nor power door locks. All fuses are good...
It's failed in smog test because of rpm too high and timing
need to know how to get access to unit note no lift
What all is involved in belt(s) replacement?