Re: only 11 volts to ballast
[Re: Sniper]
#3216463
02/26/24 09:30 PM
02/26/24 09:30 PM
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Joined: Jan 2003
Posts: 5,439 So Cal
Sinitro
master
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master
Joined: Jan 2003
Posts: 5,439
So Cal
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Sniper is correct.. Voltage from the ignition switch(start) to the input side of the ballast resistor should be the same as the battery voltage.. Just my $0.02...
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Re: only 11 volts to ballast
[Re: second 70]
#3216932
02/28/24 10:32 PM
02/28/24 10:32 PM
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Joined: Jan 2003
Posts: 15,355 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,355
Omaha Ne
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I had a few minutes yesterday so I thought I'd check the battery terminal on the fuse box first to maybe rule out the ignition switch and it too only had 11 volts. After pushing on the bulkhead connection it got battery voltage but the ignition was still 11.
But still the car started right up and charging and voltage readings were all good. But when I turned off the car I still only had 11 to ballast. It has full voltage when it's running and starts back up fine?
So it looks most likely to be the bulkhead connection. I'll have to work on it later when I get some time. No rush even thou it was 80 yesterday it's still winter and left over salt on all the roads. The wind chill now is -3. Lol
Also does the fuse box itself just clip on the bulkhead block?
I believe it has an amp gauge. It's an ebody rallye dash?
Thanks again I am not overly familiar with the 70? harnesses but I believe the fuse box and dash harness are one unit that is also the female side of the bulkhead connector. The engine side (ignition and charging) male connectors plug directly into the fuse box I believe. The clue is in the bolded part of your statement. You have to find that V drop before you wind up with an electrical fire. I would encourage checking the Alternator battery stud V and comparing it to the battery V with the engine at ~ 2000- 2500 RPM. I suspect you're going to find the alternator output is much higher than the battery V. The ignition side of the ballast is normally used as the "V sense" source for the V regulator. if it is only seeing the same 11V it will crank up the alternator output to try and compensate. This usually also shows a constant charge condition on the Ammeter. I am not 100% sure what year make model you're dealing with which hampers being 100% on this. That 1.5V drop needs to be found and corrected. keep us posted
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Re: only 11 volts to ballast
[Re: TJP]
#3217275
03/01/24 01:37 PM
03/01/24 01:37 PM
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Joined: Sep 2003
Posts: 19,396 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,396
north of coder
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one other item i find as problematic, are those "bolt on" replacement battery terminals. if you have those, PLEASE do yourself a HUGE favor and get replacement cables, or at the very least, a pair of quality crimp/solder terminal ends ! this type of battery cable ends are a giant peeve of mine.......... they are also a problem waiting to surface. nothing makes me question a vehicle's worthiness more than THOSE things !
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Re: only 11 volts to ballast
[Re: moparx]
#3217375
03/01/24 10:09 PM
03/01/24 10:09 PM
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Joined: Jan 2003
Posts: 15,355 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,355
Omaha Ne
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one other item i find as problematic, are those "bolt on" replacement battery terminals. if you have those, PLEASE do yourself a HUGE favor and get replacement cables, or at the very least, a pair of quality crimp/solder terminal ends ! this type of battery cable ends are a giant peeve of mine.......... they are also a problem waiting to surface. nothing makes me question a vehicle's worthiness more than THOSE things ! Always RED FLAG #1
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