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Re: System voltage problems
[Re: Fred_Gilmore]
#1826143
05/13/15 10:23 PM
05/13/15 10:23 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Voltage at battery after starting, 15.45. From what I have read, the voltage shouldn't be that high?? Correct, way too high & that high will fry and or shorten the life of any electrical device that is "on". (1) undercharged batt (2) bad/sulfated batt (3) bad reg (4) "green wire" alt brush/green field wire back to reg dead shorted to ground
live every 24 hour block of time like it's your last day on earth
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Re: System voltage problems
[Re: Fred_Gilmore]
#1826276
05/14/15 12:00 AM
05/14/15 12:00 AM
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Joined: Feb 2003
Posts: 8,671
Andrewh
master
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master
Joined: Feb 2003
Posts: 8,671
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I bought a 10 pack of them a while back on ebay. http://www.ebay.com/itm/10-PACK-RELAY-HA...cc8&vxp=mtrI ran new wire to the vr, and already had new wiring to the alt. in your case, I would trace back the line to the ballast, clip it there. see the drawing above. that way both the vr and the other field line get 12 volts. I wired the switch portion to that line, so when it got power the relay closed. power to the vr and alt came from the starter solinoid as it was pretty close to where I put the relay. I grounded it to the vr/engine ground strap.
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Re: System voltage problems
[Re: Fred_Gilmore]
#1826484
05/14/15 10:52 AM
05/14/15 10:52 AM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Probably missing the ground wire from the back of the pass side head to the firewall.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: System voltage problems
[Re: Fred_Gilmore]
#1826499
05/14/15 11:38 AM
05/14/15 11:38 AM
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Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
minivan
master
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master
Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
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Problem solved! Thanks Lefty for making me take another look at grounding. I hooked up a different regulator without mounting it to the firewall and grounded it with a jumper to the engine. Worked. So now I'm thinking bad regulator again. Mounted it to the firewall and now it doesn't work again..... Even though it shows its grounded. So I put a jumper from the regulator to the engine block. Works again. Now I'm suspecting my brand new negative battery cable. Sure enough, the small wire moulded into the post lug has no connection! They must have thought they didn't need to remove the insulation when they stuck it in there.....probably made in China. Guess I better call Frank this time for one.... I struggled with this on my 67 coronet.. Full resto, everything new and after a couple of years of driving something was not right.. Turned out to be a loose ( snug but not tight) connection on my starter relay at the firewall connection.. Tightened up the nut and presto.........
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Re: System voltage problems
[Re: Supercuda]
#1826693
05/14/15 04:50 PM
05/14/15 04:50 PM
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Joined: Jan 2003
Posts: 5,268
NY
70440+6bbl
master
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master
Joined: Jan 2003
Posts: 5,268
NY
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Probably missing the ground wire from the back of the pass side head to the firewall. That ground was omitted in '70-on. They molded the ground into the negative cable that screwed into the radiator support near the battery.
'70 Super Bee 440 6 pack 4-spd 4.10 Dana N96 EB5
‘70 Super Bee 440 6 pack 4-spd 3.54 Dana FC7
‘70 ‘Cuda 440+6bbl 4-spd 3.54 Dana N96 EB5 V1W
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Re: System voltage problems
[Re: 70440+6bbl]
#1827271
05/15/15 03:04 PM
05/15/15 03:04 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Probably missing the ground wire from the back of the pass side head to the firewall. That ground was omitted in '70-on. They molded the ground into the negative cable that screwed into the radiator support near the battery. And later they added that ground back, must be a reason for that. Unless it's a perfect resto, I'd put a ground strap from the back of the head to the mounting bolt for the VR, then you know it's as good as it gets. I'd rather do that than scrape paint off the firewall for a good contact anyway. Heck I even added a ground from my alternator case to the block, but I don't do resto type vehicles.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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