Jump to content



86 flatty alternator going out...swap with an 88?


  • Please log in to reply
9 replies to this topic

#1 SFBMX88

SFBMX88

    Established Member

  • Members
  • PipPipPip
  • 1,359 posts
  • Gender:Male
  • Location:SAN FRANCISCO
  • Interests:WE LIKE THE MOON!!!!!
  • Model:Conquest

Posted 17 February 2012 - 09:14 PM

Is it possible to swap in an 88 alternator into my 86 flatty?  I have one from my old widebody that is known to work just sitting here in my storage space.  I know for sure I will have to swap pulleys, but what has to be done with the 2 pin connector?  I had a quick glance at both years wiring diagrams, and it seems like the circuits are a bit different.  Is there anything extra that has to be done if this is possible?
Posted Image





#2 creakyjoints

creakyjoints

    Established Member

  • Members
  • PipPipPip
  • 805 posts
  • Gender:Male
  • Location:Seattle
  • Model:Starion

Posted 17 February 2012 - 09:23 PM

The plug is different. If you dont mind cutting the harness it should be fine.
Posted Image  Posted Image

#3 Starquest86

Starquest86

    Established Member

  • Members
  • PipPipPip
  • 617 posts
  • Gender:Male
  • Location:Green Bay, Wisconsin
  • Interests:Mitsubishi's, Honda's, Subaru's, and any Japanese bikes, Family, Painting(automotive), Music..
  • Model:Other

Posted 17 February 2012 - 09:37 PM

Ever consider getting it rebuilt?
Posted Image
1986 Dodge Conquest LO5 (sold) Trying to reacquire
1987 Chrysler Conquest X15 (sold) Trying to reacquire

1995 Honda Civic Dx (dd)
1994 Honda Del Sol Si (Project)
1999 Subaru Legacy L Wagon (my car, lady dd)
1999 Toyota Camry (For Sale)
2009 Crf 230M (80mpg)
1983 Suzuki Fa50 (83 mp half gallon)

Turbo For Life

God created turbo lag to give V8's a chance.
"If life throws you a curve, pop the clutch and drift it."

#4 Coke

Coke

    Member Since January 2003

  • Members
  • PipPipPipPip
  • 5,182 posts
  • Gender:Male
  • Location:Pembroke/Akron, New York (near Buffalo)
  • Model:Starion

Posted 17 February 2012 - 10:06 PM

You should take it to a "mom & pop" rebuild shop, and they can sometimes rebuild it for higher amps at the same time.  The Auto Zone reman'ed alternators fry once a month.  Ask me how I know, I went thru 2 of them, and my buddy went thru 5 of them this past year.  I put an OE Mitsubishi alternator on it which I had lying around, and it's been fine since Spring of last year.  Proof their product is utter s***.
Posted Image
1986 Dodge Conquest LE Seychelles Red (R64) Resurrection Thread!
Dad's Conquest Parts - Has Just About Anything You May Need!
Starquest.i-x.net - AGAIN, Home of the S.O.S. Manuals


1.)1987 Conquest TSi - Rio Red - Totalled October 23, 2004
2.)1987 Conquest TSi - Rio Red - Sold
3.)1988 Conquest TSi SHP - Rio Red - Crushed due to Extreme Rot
4.)1985 Starion LE - Seychelles Red/Nevada Sand 2 Tone - Crushed due to Extreme Rot
5.)1988 Conquest TSi - Rio Red - Sold
6.)1988 Conquest TSi - Rio Red - Sold
7.)1986 Conquest TSi - Rio Red - Sold
8.)1987 Conquest TSi - Atlantic Blue Metallic - Totalled July 3, 2010
9.)1987 Conquest TSi - Rio Red - Crushed due to Extreme Rot
10.)1988 Conquest TSi - Rio Red - Crushed due to Extreme Rot
11.)1988 Conquest TSi - Serbia Black - Sold
12.)1986 Conquest Base - Seychelles Red Metallic - For Sale
13.)1986 Mitsubishi Starion ESi-R - Sarajevo White - Restoring

#5 kinree

kinree

    Member

  • Members
  • PipPip
  • 226 posts
  • Gender:Male
  • Location:Lakewood, Washington
  • Model:Starion

Posted 03 May 2012 - 03:16 PM

Any news on the widebody alternator? Did you get it to work if so how did you wire the two pin plug?
Posted Image

#6 SFBMX88

SFBMX88

    Established Member

  • Members
  • PipPipPip
  • 1,359 posts
  • Gender:Male
  • Location:SAN FRANCISCO
  • Interests:WE LIKE THE MOON!!!!!
  • Model:Conquest

Posted 03 May 2012 - 03:43 PM

Parts needed:

87 and up alternator(pulley must be swapped to the 86 as they are different)
87 and up alternator plug
87 and up resistor and plug(located on the relay tree on the drivers side of the engine bay)




The swap took almost a whole day.  To clarify everything, I had to combine the charging diagrams from both an 88 and 86.  Just a note, the red brake warning light on the dash of the 86 is also tied into the charging circuit.  So, if you are having alternator issues, your dash brake light will illuminate.  I think 87 and up has a separate charge/battery light.


Posted Image

I had to add the resistor and plug from my old 88 to the circuit.  Mounted it right next to the coil:

Posted Image

Added an extra ground path for the alternator to the block:

Posted Image

Works great!  Another benefit of the swap is now I have the option of running the higher amperage alternators from Monteros/Hyundais/etc....

Edited by SFBMX88, 03 May 2012 - 04:06 PM.

Posted Image

#7 kinree

kinree

    Member

  • Members
  • PipPip
  • 226 posts
  • Gender:Male
  • Location:Lakewood, Washington
  • Model:Starion

Posted 03 May 2012 - 04:10 PM

Is the resistor necessary? In the parking lot at work last night i had to put a alt from an 87 in. It seems to work other than the voltage dropping about .50-.80v when i turn the lights on you can also hear the car drop in idle.

Edited by kinree, 03 May 2012 - 04:17 PM.

Posted Image

#8 SFBMX88

SFBMX88

    Established Member

  • Members
  • PipPipPip
  • 1,359 posts
  • Gender:Male
  • Location:SAN FRANCISCO
  • Interests:WE LIKE THE MOON!!!!!
  • Model:Conquest

Posted 03 May 2012 - 04:14 PM

I think it is.  From what I remember, it lowers the voltage seen at the alternator to increase its output.
Posted Image

#9 kinree

kinree

    Member

  • Members
  • PipPip
  • 226 posts
  • Gender:Male
  • Location:Lakewood, Washington
  • Model:Starion

Posted 03 May 2012 - 04:18 PM

To clarify your diagram i would just add the resistor between the white and blue wire for the plug?
Posted Image

#10 SFBMX88

SFBMX88

    Established Member

  • Members
  • PipPipPip
  • 1,359 posts
  • Gender:Male
  • Location:SAN FRANCISCO
  • Interests:WE LIKE THE MOON!!!!!
  • Model:Conquest

Posted 03 May 2012 - 04:23 PM

Yes.  Also, if you can see in the picture above, I have two white wires going to one terminal of the resistor plug.  One comes from the main harness, the other goes to the actual alternator two pin plug(the smaller gauge wire of the two).

Posted Image


Turns out I actually have a picture of it :)

Posted Image

Edited by SFBMX88, 03 May 2012 - 04:24 PM.

Posted Image




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users