91 Mustang Alternator Wiring To A 68

MustangMando

Member

Jul 16, 2011

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17

Sep 1, 2014

#1

• Sep 1, 2014

• #1

I have a stock 91 302 efi i have put in my 68 mustang, i need help on wiring the alternator. its a stock alternator with internal voltage regulator and I'm not needing to upgrade since I'm not running much load. Anybody have any tips on wiring the alt. is the external voltage regulator necessary in the 68, can i just get rid of it or do i need to jump wires? I have a green wire in my rjm efi harness that says alt, any ideas what its for?

Thanks

 

MustangMando

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Jul 16, 2011

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Sep 4, 2014

#2

• Sep 4, 2014

• #2

Here is the alt

 

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71fordramair

15 Year Member

Apr 29, 2008

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el cajon ca.

Sep 14, 2014

#3

• Sep 14, 2014

• #3

that kinda looks like a 2g alt. a 3g is better, the one with no external fan on pulley. they both hook up the same, all wires go to starter relay + bat side. the 18 ga green wire with red stripe is to amp gage and is the same color in old mustangs. get a J Y 175 amp fuse and use between alt and bat. check with numerous posted diagrams on web

 

MustangMando

Member

Jul 16, 2011

107

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17

Sep 20, 2014

#4

• Sep 20, 2014

• #4

Wired it up now, thanks. can I just get rid of the voltage regulator now or do I have to jump some wires?

 

MustangMando

Member

Jul 16, 2011

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Sep 20, 2014

#5

• Sep 20, 2014

• #5

Oh and yes a 3G alt is better, but I have this good 2g alt laying around

 

71fordramair

15 Year Member

Apr 29, 2008

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el cajon ca.

Sep 21, 2014

#6

• Sep 21, 2014

• #6

i unbolted regulator and removed the old harness, much cleaner. cant believe ford left the same color amp gage wire [lt green w/ red stripe] wire for 40 plus years