Voltage drop/complicated
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Lead Driver
Joined: Nov 2000
Posts: 6,639
Likes: 349
From: Albuquerque
Voltage drop/complicated
I have a radar detector that displays voltage now. don't know how long this has been going on but initially on starting I get 14.0v but after running for a while it starts to sag all the way down to 12.5v if I have load turned on. After a brief stop it goes back up to about 13.8v and begins to sag again. Very frustrating as I have a new red top battery old one did the same and 140a Power Master ( tried another exact model I happened to have on hand) one wire alternator. Large cables, lots of grounds, tight belt. Even with nothing else turned on it happens (MSD ignition box). Battery voltage after resting is stable at 12.72v which is good for the red top. Less that .5 ohm from alternator case to battery ground.
Power Master says the alternator cannot be remote referenced (ignition hot to terminal one I think) and idle voltage checked at idle is 14.8v. WTH! God must think I am Job's replacement with some of the oddball stuff I run into.
Gonna use a remote volt meter to compare actual battery volt to interior volts but I think it's only .4v less.
Anywho, help!!!!!!!!!!!
Power Master says the alternator cannot be remote referenced (ignition hot to terminal one I think) and idle voltage checked at idle is 14.8v. WTH! God must think I am Job's replacement with some of the oddball stuff I run into.
Gonna use a remote volt meter to compare actual battery volt to interior volts but I think it's only .4v less.
Anywho, help!!!!!!!!!!!
Thread Starter
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Lead Driver
Joined: Nov 2000
Posts: 6,639
Likes: 349
From: Albuquerque
12.5v is enough to start the battery sulfacting. I don't think I should ever see less that 13.4.
Side note I'm checking belt tension. felt pretty tight but it's a big alternator.
after a hard launch the other day checking out new gear. I noticed some smoke coming out of the hood seams. Thought it weird the tire smoke got sucked up there. More likely the belt was slipping I guess.
I'll be back.
Ivan Toratireoff
Side note I'm checking belt tension. felt pretty tight but it's a big alternator.
after a hard launch the other day checking out new gear. I noticed some smoke coming out of the hood seams. Thought it weird the tire smoke got sucked up there. More likely the belt was slipping I guess.
I'll be back.
Ivan Toratireoff
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