charging system
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Joined: Oct 2000
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charging system
When I pull of the postive wire from the battery the truck should keep run right?
the truck keeps running but it seems to skip out and not run as even
as it does with the postive wire on. does anyone know whats going on with this.
If the alternater was junk wouldn't it just cut out.
the truck keeps running but it seems to skip out and not run as even
as it does with the postive wire on. does anyone know whats going on with this.
If the alternater was junk wouldn't it just cut out.
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New User
Joined: Jan 2008
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charging system
Rule of Thunb >
Never disconnect the Battery terminals when the engine is running.
Especially the Positive wire.
The current from the alternator someplace to go.
I have to ask ,why would you want to take the + battery cable off when the engine is running ?
Regarding the other thing:
Apology accepted.
Everyone makes mistakes,even me.
If I could re-rate you ,I would give you a 2 for your ability to apologise.
Dennis
First Came the Chicken,
Then Came the Egg,
Or Was It the Other Way Around?
78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles
Never disconnect the Battery terminals when the engine is running.
Especially the Positive wire.
The current from the alternator someplace to go.
I have to ask ,why would you want to take the + battery cable off when the engine is running ?
Regarding the other thing:
Apology accepted.
Everyone makes mistakes,even me.
If I could re-rate you ,I would give you a 2 for your ability to apologise.
Dennis
First Came the Chicken,
Then Came the Egg,
Or Was It the Other Way Around?
78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles
Freshman User
Joined: Oct 2000
Posts: 37
Likes: 0
charging system
This is the poor mans way of checking to see if the alternater is charging.
if the car does not stay running the alternater or voltage reg is junk.
is there a better way to check this stuff.
And thank you for you kindness also
if the car does not stay running the alternater or voltage reg is junk.
is there a better way to check this stuff.
And thank you for you kindness also
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New User
Joined: Jan 2008
Posts: 0
Likes: 24
charging system
By a $15.00 Digital Volt/Ohms meter .
With the engine idling ,Set it at the 20 Volt Read mark,attach the red end to the positive post and the black end to the negative post.
Now you have Idle Voltage.about 11.8 -12.2v
Slowly rev the engine up and the needle should rise to about 15 V
That means the alternator and the voltage regulator are functioning fine.
Dennis
First Came the Chicken,
Then Came the Egg,
Or Was It the Other Way Around?
78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles
With the engine idling ,Set it at the 20 Volt Read mark,attach the red end to the positive post and the black end to the negative post.
Now you have Idle Voltage.about 11.8 -12.2v
Slowly rev the engine up and the needle should rise to about 15 V
That means the alternator and the voltage regulator are functioning fine.
Dennis
First Came the Chicken,
Then Came the Egg,
Or Was It the Other Way Around?
78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles
Posting Guru
Joined: Jun 1999
Posts: 1,100
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From: Durham
charging system
When you initially start your vehicle, the voltage will read between 11 and 13 volts depending on the condition of the battery...rap the engine up a little and the voltage regulator should kick in jumping the voltage to around 14.5 volts (output from the altenator)...this voltage should remain constant at all engine speeds and will drop as you turn on accessories (such as lights)...the amperage will change with the engine speed, but the voltage should remain constant. I agree that is rather risky to remove the positive cable with the engine running, especially with computer modules in the network. Most ignition type computers need a solid 13+ volts to keep the vehicle firing properly.
Slik
Slik
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