1991 BMW 318is Questions

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well i changed the plastic coolant tube that sits under the throotle and next to the injectors and fuelrail right onder the intake uits a plastis tube that has coolant water run through it and i might of pulled a sensor knockwire off caquse its hangin.i changed around the relays and forgot what color went wouldnt start so i got a jumpstart from someone and it cranked but no start .now it wont cranl but it lights uip the gauges doors lights and all but wont crank now just lights up. what did i do short out the car???can u help me please to get it running its definately electrical not mechanical problem a backyard mechanic told me can someone help???ive tried a new battery also and somethin is draining the battery overnight cause the battery goes dead
I also need a diagram of the whole bmw motor please labled?
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