Question about a mysterious Part on the core support? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68c20lwb · 05-22-2011, 08:23 PM

Hello, there is a metal box with 4 or so plugs and a plug with a resistor looking thing attached to the core support on the inside driver side. Below the washer fluid container. I THINK it is wired into the headlight wire harness? Well I started my truck right now after my 454 transplant and I started smoking from the backside. I shut it off and put my finger behind it and it burned it (stupid I know) it stops smoking when the truck is off. I took it off the core support and opened it up and I do see burn marks on one of the contacts inside. How do I fix and or replace this? Thanks folks!!
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71swb4x4 · 05-22-2011, 08:35 PM

It is the regulator for the alternator. The best way to fix it is to replace your alternator with an internally regulated alternator and do away with the core support mounted regulator.

Edit: Here is how to do it. http://67-72chevytrucks.com/vboard/s...d.php?t=119379

68c20lwb · 05-22-2011, 10:14 PM

I put in a alternator out of a 84 dump truck, would that have fried it?
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05-22-2011, 08:23 PM	#1
68c20lwb Registered User Join Date: Mar 2011 Location: Hankinson, ND Posts: 190	Question about a mysterious Part on the core support? Hello, there is a metal box with 4 or so plugs and a plug with a resistor looking thing attached to the core support on the inside driver side. Below the washer fluid container. I THINK it is wired into the headlight wire harness? Well I started my truck right now after my 454 transplant and I started smoking from the backside. I shut it off and put my finger behind it and it burned it (stupid I know) it stops smoking when the truck is off. I took it off the core support and opened it up and I do see burn marks on one of the contacts inside. How do I fix and or replace this? Thanks folks!! Posted via Mobile Device __________________ 1968 C20 450hp 425ft-lbs 454/SM465 4.56's 2004 HD rims, needs paint and a 5th gear! 1969 C30 Open Road Motorhome 350/th400 1972 K10 350/350/205 Daily Driver -SOLD

05-22-2011, 08:35 PM	#2
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: Question about a mysterious Part on the core support? It is the regulator for the alternator. The best way to fix it is to replace your alternator with an internally regulated alternator and do away with the core support mounted regulator. Edit: Here is how to do it. http://67-72chevytrucks.com/vboard/s...d.php?t=119379 __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs. Last edited by 71swb4x4; 05-22-2011 at 08:38 PM.

05-22-2011, 10:14 PM	#3
68c20lwb Registered User Join Date: Mar 2011 Location: Hankinson, ND Posts: 190	Re: Question about a mysterious Part on the core support? I put in a alternator out of a 84 dump truck, would that have fried it? Posted via Mobile Device __________________ 1968 C20 450hp 425ft-lbs 454/SM465 4.56's 2004 HD rims, needs paint and a 5th gear! 1969 C30 Open Road Motorhome 350/th400 1972 K10 350/350/205 Daily Driver -SOLD



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