Electrical problem
09-02-09, 05:58 PM
#1
Junior Member
Thread Starter
Join Date: Aug 2009
Location: Bowling Green, Ohio
Posts: 27
Likes: 0
Received 0 Likes
on
0 Posts
Electrical problem
Ok long story short, my alternator went bad. I got a new one, installed it, and now im getting no power with the key on besides the door open idiot light, no headlights, wiper, hazards, air, etc. Checking the system my main fuse was blown and is getting a tremendous amount of current, sparking every time i put my dmm up to it, and heating my lead wires while doing so.. I tried looking at the factory service manual for a wiring diagram or something. The small wire on the negative side is the one holding all of the current, Does anyone know what that wire leads to? and to add my rear wiper does not work. im thinking it may be shorted out resulting in this situation but i need to know where the one small wire at the negative battery terminal leads to for me to find out. your help is GREATLY appreciated. I've only had this car for about a month maybe and its not treating me too well.
09-02-09, 06:37 PM
#4
Senior Member
Join Date: Aug 2009
Location: Los Angeles
Posts: 479
Likes: 0
Received 0 Likes
on
0 Posts
SUre sounds like a dead short to me. Are you saying the system is pulling high current even when the main fuse is burned out?
That doesn't make sense... unless the short is between the battery + terminal and the main fuse, but that is a very short run.
What happens if you pull all the fuses in the car except the main? Do you still get the high current?
That doesn't make sense... unless the short is between the battery + terminal and the main fuse, but that is a very short run.
What happens if you pull all the fuses in the car except the main? Do you still get the high current?
09-02-09, 07:22 PM
#5
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 22 Likes
on
20 Posts
The positive cable on the battery has two cables. One large, the other smaller.
ON all three of my cars, the negative cable has but one cable.
The small wire on the POSITIVE cable , goes to the fwd side of the engine bay fuse box and feeds those fuses in that box plus the Main Fuse which in turn feeds the single black wire that goes to the ignition key. That wire has batt voltage all day long as long as the Main fuse is good and the right battery cables are installed on the correct battery posts.
That single black wire at the ignition switch, feeds most of the fuses in the interior fuse box IF the key is put to ON.
BAtt cables are on *** backwards imho. Just an opinion, nothing more or less.
ON all three of my cars, the negative cable has but one cable.
The small wire on the POSITIVE cable , goes to the fwd side of the engine bay fuse box and feeds those fuses in that box plus the Main Fuse which in turn feeds the single black wire that goes to the ignition key. That wire has batt voltage all day long as long as the Main fuse is good and the right battery cables are installed on the correct battery posts.
That single black wire at the ignition switch, feeds most of the fuses in the interior fuse box IF the key is put to ON.
BAtt cables are on *** backwards imho. Just an opinion, nothing more or less.
09-02-09, 07:56 PM
#6
Retired Moderator, RIP
iTrader: (142)
Join Date: Sep 2005
Location: Smiths Falls.(near Ottawa!.Mapquest IT!)
Posts: 25,581
Likes: 0
Received 131 Likes
on
114 Posts
Negative wire has the STRIPE on it.
do yourself a favor and get some RED and black tape,and mark the Cables...It happens to everyone,at some point.
do yourself a favor and get some RED and black tape,and mark the Cables...It happens to everyone,at some point.
09-03-09, 01:09 AM
#7
Junior Member
Thread Starter
Join Date: Aug 2009
Location: Bowling Green, Ohio
Posts: 27
Likes: 0
Received 0 Likes
on
0 Posts
Yea that just happened to me, thanks for the help.
One more question now that we're on electrical and i already feel like an idiot.
There is a connector behind the alternator that looks like it should plug into the back of the alternator itself. I looked on the fsm and it shows it connecting but it also shows the wire coming from somewhere else. Not to mention it wasn't plugged in when i bought the car.
Once again thank you tons for the help!!
One more question now that we're on electrical and i already feel like an idiot.
There is a connector behind the alternator that looks like it should plug into the back of the alternator itself. I looked on the fsm and it shows it connecting but it also shows the wire coming from somewhere else. Not to mention it wasn't plugged in when i bought the car.
Once again thank you tons for the help!!
Trending Topics
09-03-09, 03:47 PM
#8
Haha... that's the field connector for the alternator. Picture this:
Your alternator works on the principle that magnets spinning around a bunch of conductors induce a voltage. Well, the armature of the alternator is not a permanent magnet, it's an electromagnet. Without the connector plugged in, it's not going to get the voltage to the alternator to make the magnetic field to make electricity. Yes, it takes electricity to make it.
So... your alternator may not have been bad.
Your alternator works on the principle that magnets spinning around a bunch of conductors induce a voltage. Well, the armature of the alternator is not a permanent magnet, it's an electromagnet. Without the connector plugged in, it's not going to get the voltage to the alternator to make the magnetic field to make electricity. Yes, it takes electricity to make it.
So... your alternator may not have been bad.
09-06-09, 03:27 AM
#11
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 22 Likes
on
20 Posts
The voltage to the alternator from the WHITE/BLACK wire is what excites the alternators regulator. The BLACK/WHITE powers the regulator inside the alternator.
A RX alternator can self excite if the WHITE/BLACK wire is missing thru residual magnatism in the ROTOR of the alternator. Usually you have to rev the engine up a bit to make it self excite.
Once excited, and no power to the regulator inside the alternator, I can see how the old alternator might have destroyed itself over a period of time. Just an opinion.
A RX alternator can self excite if the WHITE/BLACK wire is missing thru residual magnatism in the ROTOR of the alternator. Usually you have to rev the engine up a bit to make it self excite.
Once excited, and no power to the regulator inside the alternator, I can see how the old alternator might have destroyed itself over a period of time. Just an opinion.
09-06-09, 04:02 AM
#12
Junior Member
Thread Starter
Join Date: Aug 2009
Location: Bowling Green, Ohio
Posts: 27
Likes: 0
Received 0 Likes
on
0 Posts
Thats what i was thinking!!! So plugging it in excites the alternator, not stressing it, or causing the long term harm. I'm gonna plug it up.
Thread
Thread Starter
Forum
Replies
Last Post
The1Sun
1st Generation Specific (1979-1985)
7
09-18-15 07:13 PM