Questions on an alternator

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Brimak86

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Mar 27, 2004

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Apr 10, 2004

#1

• Apr 10, 2004

• #1

ok, I just got a 200 amp alternator for my 1990 mustang. I wanna know the best way to approach the install. I know i'm gonna have to cut the mounting bracket and I know theres something about rewiring. I dont really no much else, and I'm not even sure what the wiring entails. Any help would be appreciated, Thanks

 

stangbear427

Active Member

Nov 11, 2002

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New England

Apr 10, 2004

#2

• Apr 10, 2004

• #2

What do the directions say? What brand is it? What style- one wire, three wire, 1G, 2G, 3G- need more info!

 

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Brimak86

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Mar 27, 2004

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Apr 10, 2004

#3

• Apr 10, 2004

• #3

All I really know is its a 3g and it says its configured as a direct bolt-on

 

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87'GTstang

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Feb 16, 2004

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Apr 11, 2004

#4

• Apr 11, 2004

• #4

http://www.fordmuscle.com/archives/2001/03/paperformance/index.shtml

All you need to know.

BTW, don't put the old 2 black and orange 10 guage wires on the alternator, just leave them off but don't disconnect it from the starter relay as this is where your voltmeter gets its readings from. If you do put them on, you risk a fire hazard from overloaded circuitry.

 

jrichker

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Apr 12, 2004

#5

• Apr 12, 2004

• #5

Here's websites with pictures of the 3G ( 94 Mustang and later 130 amp alt) installation procedure...

See http://www.geocities.com/smithmonte/Auto/3G_130A_Alternator_Upgrade.htm - all the tech data you could ever want to know
OR
http://www.mustangcentral.net/tech/alternator.html - excellent pictures of installation

For the right way to do the wiring. Some people will tell you that you can skip the wiring upgrade, but it will catch up with you sooner or later. A fire in the wiring harness is ugly and expensive.

Under no circumstances connect the two 10 gauge black/white wires to the 3G alternator. If the fuse blows in the 4 gauge wire, the two 10 gauge wires will be overloaded to the point of catching fire and burning up the wiring harness.

 

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87'GTstang

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Feb 16, 2004

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Apr 12, 2004

#6

• Apr 12, 2004

• #6

The only way around that if you really want to connect those wires that badly would be to add an inline fuse (ditch the fusible link) with a low amperage rating of like around 5 amps or so. That way if it gets overloaded that fuse will blow faster than that fusible link ever would and should prevent the problem altogether and in a hurry.

 

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Brimak86

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Mar 27, 2004

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Apr 16, 2004

#7

• Apr 16, 2004

• #7

I had my new 200 amp 3g alternator tested at several of the local auto parts stores and all their machines said it wasn't putting out the supposed amps not even close. Is this normal for these alternators or is mine a dud?