1990 Other Mitsubishi Models alternator?

1990 MITSUBISHI
119,333 MILES • 4 CYL • 2WD • MANUAL
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ANDYREWSKI
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my truck runs and drives fine. i have a used alternator so that might be a problem, i bought a new battery few nights ago and then it died the next. my truck will start and run for a little if i charge the battery but i believe the alternator is killing it. in the wire cluster that goes to the alternator there is one single yellow wire that does not go anywhere i taped it up but i still do not know where it goes. and if that might be the problem.
Feb 15, 2009 at 1:31 PM
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RASMATAZ
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What is the model on this vehicle? Mirage/Montero ????

Get the alternator load tested if okay check for a short circuit that may be draining the battery overnite
Feb 15, 2009 at 1:40 PM
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ANDYREWSKI
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1990 mighty max, how would i go about getting the alternator tested and the short circuit wires?
Feb 15, 2009 at 1:44 PM
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RASMATAZ
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To test the alternator

Get a voltmeter read the battery voltage before you start it up record the reading, Now start it up record the reading again-If the alty is good it will read between 13.5volt to 15.5 volts

For the short circuit-

Disconnect the negative battery cable put the red lead to the disconnect cable and black lead to the negative battery post if the reading is battery voltage-start removing fuses one by one till the voltage is not there at this point this is where the short circuit is.

Good Luck
Feb 15, 2009 at 3:36 PM