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

bluec10 · 03-21-2010, 07:28 PM

Up here in Canada the snow is just starting to melt. In about a week the driveway to the garage where I store my '69 GMC will be clear and we'll go for our inaugural drive for 2010.

So anyway, when I parked the truck last fall the it was discharging, but the discharge light wasn't working. The new battery was dead all the time, so I'm drawing some conclusions about the alternator.

I have a good working alternator from a '76 GMC, but it has the internal regulator. What would it take for me to transplant this piece into the '69? The '69 has a separate voltage regulator.

TFYH

Beuford · 03-21-2010, 08:02 PM

This web site offers one solution. You can buy the conversion kit from Either Brothers or LMC.I'm not sure whitch but I bought one a couple of years ago and it worked ok. Good Luck

Bob

http://www.chevelles.com/techref/ftecref14.html

Sinister · 03-21-2010, 08:02 PM

There's a good write up in the FAQ: http://67-72chevytrucks.com/vboard/s...d.php?t=119379

Stano · 03-21-2010, 08:38 PM

Is the bulb good in the discharge light? It needs to be for the charging system to work correctly. Just went through this on another vehicle. Sounds stupid but its true in my case. Read something about it here on this site a while back also so you might check. I think its for the externally regulated systems only though.

Hubscrub · 03-21-2010, 10:13 PM

you can buy these from classic industries, classic parts of america etc.. about $20 one part plugs into your oringinal volt reg. and the other converts your factory plug to an internal alt plug

bluec10 · 03-21-2010, 10:15 PM

Thanks guys.

I didn't know that the bulb was so important.

Last summer the wiring harness got caught on the steering column and wound around it. I repaired the wires and the truck worked well for a few months, but I'm wondering if my current problems are fallout from the wire wrapping incident.

03-21-2010, 07:28 PM	#1
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	Alternator Woes Up here in Canada the snow is just starting to melt. In about a week the driveway to the garage where I store my '69 GMC will be clear and we'll go for our inaugural drive for 2010. So anyway, when I parked the truck last fall the it was discharging, but the discharge light wasn't working. The new battery was dead all the time, so I'm drawing some conclusions about the alternator. I have a good working alternator from a '76 GMC, but it has the internal regulator. What would it take for me to transplant this piece into the '69? The '69 has a separate voltage regulator. TFYH __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said. Last edited by bluec10; 03-21-2010 at 07:28 PM.

03-21-2010, 08:02 PM	#2
Beuford Registered User Join Date: Oct 2009 Location: Townville,Pa Posts: 284	Re: Alternator Woes This web site offers one solution. You can buy the conversion kit from Either Brothers or LMC.I'm not sure whitch but I bought one a couple of years ago and it worked ok. Good Luck Bob http://www.chevelles.com/techref/ftecref14.html

03-21-2010, 08:02 PM	#3
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: Alternator Woes There's a good write up in the FAQ: http://67-72chevytrucks.com/vboard/s...d.php?t=119379 __________________ Beat it to fit, Paint it to match...

03-21-2010, 08:38 PM	#4
Stano Registered User Join Date: Jul 2000 Location: Mo Posts: 963	Re: Alternator Woes Is the bulb good in the discharge light? It needs to be for the charging system to work correctly. Just went through this on another vehicle. Sounds stupid but its true in my case. Read something about it here on this site a while back also so you might check. I think its for the externally regulated systems only though. __________________ New daily driver 96 Chevy K3500 crew cab dually 53,000 miles 350 Vortec 4L80 Nice ride 67 Chevy C-10 LWB Built 350 TH-400 Wifes ride and family rig: 2001 Furd Expedition 5.4 Liter Kickin back in Rolla,Mo. USA "Do the thing you fear most and the death of fear is certain" Mark Twain

03-21-2010, 10:13 PM	#5
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	Re: Alternator Woes you can buy these from classic industries, classic parts of america etc.. about $20 one part plugs into your oringinal volt reg. and the other converts your factory plug to an internal alt plug Attached Images __________________ Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14

03-21-2010, 10:15 PM	#6
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	Re: Alternator Woes Thanks guys. I didn't know that the bulb was so important. Last summer the wiring harness got caught on the steering column and wound around it. I repaired the wires and the truck worked well for a few months, but I'm wondering if my current problems are fallout from the wire wrapping incident. __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.

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