Question about 1986 Chevrolet Chevy

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I purchased an alternator from e bay advertised as late model gm. it looks like gm but has no screw on the back to attach ahe battery wire. it has a connector with three large pins in it. the other connector has three smaller pins in it. what could it fit? it appears to be a 75 amp alternator

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From what you are describing, it sounds very similar to a late model ford alternator that were made through the 90's, and it sounds like the type that ford used in the F-350's and larger trucks.

Posted on Apr 29, 2010

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Automobile battery and charging system



Most automobile batteries are lead acid which should have a standing voltage of about 12.6V fully charged at 70 degrees F. To test a battery first it must be fully charged. If fully charged a good battery will stay above 9.5V while cranking engine. Most part stores will charge and test batteries, starters and alternators. To be sure your alternator is properly charging start the engine and turn on the headlights and blower fan to add electrical load. Voltage should be over 13.2V at idle and under 15V with a known good battery. If not check the larger wire bolted to the back of the alternator for loose connection and continuity to the battery. If ok check fuses. If all are present and check good most likely the alternator is bad and needs replacement, although it is possible on many modern automobiles to have a powertrain control module (PCM) be the problem as they serve as the voltage regulator. Most late 90s and newer GM and Chrysler do. If all else fails have a professional check it to be sure. Hopefully this will answer the questions of many. Good luck ??.

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Where is ac pressure switch


On GM models up to the late nineties it is located in the low pressure AC hose or on the accumulator which the low pressure line attaches to. The switch has a 2 or 3 wire connector to it and screws into a pressure port like a large tire valve..

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Have a delcotron alternator ,what to know where no.1 terminal and no.2terminal wire goes it is on my 1946 cj2a jeep my amp hand does not show a charge had alternator checked out and is ok


  • Use a wrench to remove the negative and positive battery cables: They are clearly labeled "+" and "-." Always remove the negative cable first, as this isolates the power to the metal parts of your car. Tuck the cables away from the battery as you don't want them to accidentally touch a battery terminal when you're wiring your alternator.

  • 3

    Locate the alternator terminals. There are two: one marked "live," "pos" or "+" and the other marked "neg," "field" or "-."

  • 4

    Locate the two cables. The positive (red) cable goes to your battery via a wire loom or harness. The negative (black) cable attaches to a metal part of your car.

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    Check how the cables attach to the alternator terminals. Some connect using eyelets that hook over the terminal and tighten with a bolt; others connect by inserting the wire under the terminal and tightening a bolt.

  • 6

    Loosen the two bolts using a suitable-sized wrench or, if the cables connect using eyelets, remove the bolts.

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    Insert the exposed end of the negative (black) cable under the loosened bolt on the negative terminal of the alternator, then tighten the bolt. If the cable has an eyelet, hook it over the terminal and screw the bolt back in place and tighten using a wrench.

  • 8

    Insert the exposed end of the positive (red) cable under the loosened bolt on the positive terminal of the alternator, then tighten the bolt. If the cable has an eyelet, hook it over the terminal and screw the bolt back in place and tighten using a wrench.

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    Hi, this is a 2 wire Delco alternator. The wire from the terminal on the back goes to the battery or starter, and the other (excite) wire goes to the battery light in the dash. It also goes to the PCM--not sure which pin, sorry.

    jturcotte_1339.gif

    Mar 27, 2011 | 1995 Chevrolet Camaro

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    Hello,

    This is how you go about it;

    The serpintean belt must be taken off first, under the car remove the guard, the black piece of plastic in the front right. once thats done, there is a pulley that the serpentian belt is attached to. Look at diagram below>

    Serpentian belt diagram:
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    _
    ALT---------------------------|()|
    | |
    | |
    ----------------_ |
    ---------------Adj |
    | |
    |_ _|
    |()|--------------------------|()|


    Once you pry the Adj and create slack take the belt off. Next you must unscrew all screws on alternator including the wires attached to it. There is a wire attached on the back were it kinda clips off, and one that is screwed in it for the curren on the sidet.. Daewoo's unique design makes it so you have to actually climb under the car on jack, and take off the altinator mounting bracket screws under the alternator. Once this is done remove the alternator my taking it under the car, it should drop off when you remove the mounting screws. It should kinda slide out, but you have to work it around the exhaust. Take the alternator out, then replace it with a new one. Put the mounting screws on first while holing it with one hand. then put everything back together. Put the serpentian belt on the same way you took it off.

    NOTE: its quite a bit harder to put the belt back on. I used a wrenche to pry it loose then slid the belt on. Its is very hard to pry, especially with one hand and the belt in the other. But shouldn't be to hard if your strong. then reconnect the battery, and Bam there yah go. To test it take off one battery terminal while the car is on, if it still runs. you did it.


    Good luck!!!

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