69 Alternator Output question
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,720
Likes: 19
From: Manhattan Beach Ca
69 Alternator Output question
My car stereo amp cuts out if voltage exceeds 15.5 volts or close to that. Lately it's been cutting out a lot. So I hooked up a VM to the battery while I drive around and watched the reading go from around 13-14volts idling to over 15 when accelerating.
My question is what should the normal volt output be and is this a possible sign the alt might be going out? THX
My question is what should the normal volt output be and is this a possible sign the alt might be going out? THX
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
Kinda on the high side.
One of the 2 wires on the alternator plug is a sensor wire. It senses voltage in the system and adjusts accordingly. Check to make sure the contacts and connections are clean so it gets an accurate read.
Gary
One of the 2 wires on the alternator plug is a sensor wire. It senses voltage in the system and adjusts accordingly. Check to make sure the contacts and connections are clean so it gets an accurate read.
Gary
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
a little high
Sounds a little high 14-14.5 is tthe norm. If you have an old style points voltage regulator, you can take the cap off and adjust your mak output with a twist of teh screwdriver. very simple, doen it before, PM me if you want details
cheers
tim
cheers
tim
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,720
Likes: 19
From: Manhattan Beach Ca
I was thinking that internal regulator also, but not sure how to replace. Not sure if its a points one as mentioned. I'll do a search to see if someone has done the internal reg thing.
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
internwl or external
my comment about the points regulater only applies for an externaly regulated charging system. this would be a sqare box held to the inner fender conneted to the hardes by a 4 wire connector tow of which run to the alternator
tim
tim
Drifting
Joined: Dec 2004
Posts: 1,345
Likes: 3
Originally Posted by Surfer69
I was thinking that internal regulator also, but not sure how to replace. Not sure if its a points one as mentioned. I'll do a search to see if someone has done the internal reg thing.
Good Luck!!
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Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by big_G
Sounds high to me...Should be no more than 14.4 - 14.5v. at the battery.
Good luck...