Internal Alternator Wiring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

OLDCHEV4X4 · 08-23-2010, 07:22 AM

I have a gutted 72 Blazer with a internal regulator type alternator. None of the old harness is there except for the headlights. Battery is in the back with a disconnect switch.
I have 2 electric fans, horn, gage lights and HEI ignition.

My question is, when wiring the alternator I put the #2 (red) terminal to the 12volt post on the back with a jumper wire. What do I do with the #1 terminal. I read in the FAQ that this should go to the brown wire into the dash for resistance, so the alt knows what to do.. ? All that wiring is gone.

08-23-2010, 07:22 AM	#1
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	Internal Alternator Wiring I have a gutted 72 Blazer with a internal regulator type alternator. None of the old harness is there except for the headlights. Battery is in the back with a disconnect switch. I have 2 electric fans, horn, gage lights and HEI ignition. My question is, when wiring the alternator I put the #2 (red) terminal to the 12volt post on the back with a jumper wire. What do I do with the #1 terminal. I read in the FAQ that this should go to the brown wire into the dash for resistance, so the alt knows what to do.. ? All that wiring is gone. __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania



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