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4/3/11 10:37am - Original Message: 'Lights pulsing...HELP!'
longhorn294 Lifetime Member
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DeBerry, TX - USA

Vette(s):
1971 383 Stroker- mille miglia red...5 speed

Joined: 2/27/2002
Posts: 998
  Driving home from the hockey game last night,(yeah, we do have hockey down hereLOL), my lights started pulsing, even the dash lights. At times it almost looked like I was flashing my brights. Any ideas what/where it could be or a good place to start? Could it be alternator related?

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4/3/11 10:40am - Reply: 'Lights pulsing...HELP!'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
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On-Off pulsing, or just dimming pulsing? If they're going completely On-Off, it's prolly the headlight switch. If they're just dimming up/down, prolly a ground issue, but may very well be the alternator.

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Joel Adams
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4/3/11 12:52pm - Reply: 'Lights pulsing...HELP!'
longhorn294 Lifetime Member
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DeBerry, TX - USA

Vette(s):
1971 383 Stroker- mille miglia red...5 speed

Joined: 2/27/2002
Posts: 998
[QUOTE=Adams' Apple]On-Off pulsing, or just dimming pulsing? If they're going completely On-Off, it's prolly the headlight switch. If they're just dimming up/down, prolly a ground issue, but may very well be the alternator. [/QUOTE]
 Actually, it's more of a bright pulse than a dimming pulse. The lights don't seem to be dimming at all, more like hitting my bright lights...almost. Everything is pulsing brighter.

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4/3/11 1:55pm - Reply: 'Lights pulsing...HELP!'
longhorn294 Lifetime Member
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DeBerry, TX - USA

Vette(s):
1971 383 Stroker- mille miglia red...5 speed

Joined: 2/27/2002
Posts: 998
 It must be my clean livin'! LOL  Just went out and looked under my hood and the first thing I touched was the two prong plug on top of the alternator and the brown wire (ground, I guess) was not even connected, just sticking in the hole. How lucky can you get!  Time to go for a ride. Thumbs Up

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4/3/11 2:00pm - Reply: 'Lights pulsing...HELP!'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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YAhoooo!! Always the silly stuff....

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Joel Adams
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4/4/11 2:23pm - Reply: 'Lights pulsing...HELP!'
KDADDY79
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Dutchess County, NY - USA

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White '79 Corvette. It's a driver.

Joined: 8/27/2007
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Ya just gotta love that!
Enjoy the ride. Thumbs Up


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4/5/11 11:08pm - Reply: 'Lights pulsing...HELP!'
yostusota
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York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
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Did it plug back in or how the heck did that come un hooked? I guess if it happens again you will know what it is!

Rich

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4/5/11 11:22pm - Reply: 'Lights pulsing...HELP!'
longhorn294 Lifetime Member
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DeBerry, TX - USA

Vette(s):
1971 383 Stroker- mille miglia red...5 speed

Joined: 2/27/2002
Posts: 998
[QUOTE=yostusota]Did it plug back in or how the heck did that come un hooked? I guess if it happens again you will know what it is!

Rich[/QUOTE] The wire broke off at the plug terminal. I just had to get the terminal out of the plug and reconnect it. The thing is, I thought I had it fixed. I drove it tonight and the lights are pulsing again. If I push down on the wire I reconnected, the lights don't pulse. I didn't try to mess with it tonight. I'm wondering if the terminal is maybe loose in the alternator... Check it out tommorow..........Confused

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4/5/11 11:54pm - Reply: 'Lights pulsing...HELP!'
rraider1
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Woodland, WA - USA

Vette(s):
1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Joined: 10/14/2003
Posts: 1152
It would most likely be the red wire, that is the wire for the regulator to sense the load, the other wire is for the Gen light. if the connection is good it is possible that something is loose inside on the regulator . you could pull the Alt most shops test for free. The regulator can be changed, its not to hard. if you need it I can send you a pdf file on how to rebuild the Alt. PM me with your email

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Bob R
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4/8/11 3:27pm - Reply: 'Lights pulsing...HELP!'
OH6A Lifetime Member
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Cadiz, KY - USA

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64 Convertible 73 Coupe 74 Convertible 63 Corvair Spyder Convertible

Joined: 8/26/2002
Posts: 245
If you have an alternator with the casting number that is supposed to be on your car, rebuilt it.  Do not trade it in for a rebuild.  Numbers matching atlernators are hard to find.

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4/8/11 3:35pm - Reply: 'Lights pulsing...HELP!'
yostusota
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York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
Posts: 1518
I wish I still had the original alternator!

Rich

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My first parade at Carlisle 2010
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