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JimKshortstep4x4 · 12-17-2003, 11:18 AM

Going with an internally regulated alternator is a good upgrade. (Alternator with the rectangular plug). Square plug is the older style with the external regulator.

I believe the blue wire you are asking about is the exciter wire from the ignition. It should read voltage with the key on.

Here is a link to discussion on upgrading to an internally regulated alternator.

Jim

http://67-72chevytrucks.com/vboard/s...tor+and+change

12-17-2003, 11:18 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Going with an internally regulated alternator is a good upgrade. (Alternator with the rectangular plug). Square plug is the older style with the external regulator. I believe the blue wire you are asking about is the exciter wire from the ignition. It should read voltage with the key on. Here is a link to discussion on upgrading to an internally regulated alternator. Jim http://67-72chevytrucks.com/vboard/s...tor+and+change