Rx7 negative cable arking.
03-12-17, 03:47 PM
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Rx7 negative cable arking.
Hi I finally found an Rx7 with little rust the only problem is that apparently the negative battery cable arcs on the negative battery post. I have not messed with it since I bought it a day ago I'll post the Craigslist ad that describes the problem if anyone know anything please help me thank you. If you need a picture of anything just ask.
03-12-17, 05:26 PM
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ask the Dude if he is trying to put the Cable with the Yellow stripe on the Positive..
As That is WRONG...the STRIPED CABLE GOES ON NEGATIVE..
As That is WRONG...the STRIPED CABLE GOES ON NEGATIVE..
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03-12-17, 05:35 PM
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The cables seem to be connected correctly... The cables that go to the battery don't have any indication of the positive and negative. But I figured that the negative cable is the one with the ground sticking out right?
03-12-17, 09:53 PM
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2 things.
The cable connectors are different sizes and match the posts of the battery.They are made that way so you should really screw it up when connecting the battery (if your cables are the same color)
Now Mazda made the Negative STOCK cable with a yellow Stripe on the FC so that you could distinguish the Pos and Neg.
Some ways of Telling if you have the right wires is to OHM the wires out.With the cables Disconnected you should get ZERO from NEG to Car chassis and also ZERO from Alternator(single post terminal on alt) to Positive cable connector.
The cable connectors are different sizes and match the posts of the battery.They are made that way so you should really screw it up when connecting the battery (if your cables are the same color)
Now Mazda made the Negative STOCK cable with a yellow Stripe on the FC so that you could distinguish the Pos and Neg.
Some ways of Telling if you have the right wires is to OHM the wires out.With the cables Disconnected you should get ZERO from NEG to Car chassis and also ZERO from Alternator(single post terminal on alt) to Positive cable connector.
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03-13-17, 05:54 AM
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2 things.
The cable connectors are different sizes and match the posts of the battery.They are made that way so you should really screw it up when connecting the battery (if your cables are the same color)
Now Mazda made the Negative STOCK cable with a yellow Stripe on the FC so that you could distinguish the Pos and Neg.
Some ways of Telling if you have the right wires is to OHM the wires out.With the cables Disconnected you should get ZERO from NEG to Car chassis and also ZERO from Alternator(single post terminal on alt) to Positive cable connector.
The cable connectors are different sizes and match the posts of the battery.They are made that way so you should really screw it up when connecting the battery (if your cables are the same color)
Now Mazda made the Negative STOCK cable with a yellow Stripe on the FC so that you could distinguish the Pos and Neg.
Some ways of Telling if you have the right wires is to OHM the wires out.With the cables Disconnected you should get ZERO from NEG to Car chassis and also ZERO from Alternator(single post terminal on alt) to Positive cable connector.
03-13-17, 05:56 AM
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You can't really tell from the picture my bad on my part but The negative is the farthest away from the engine the positive is the nearest. Any ideas on what else it could be?
03-13-17, 03:50 PM
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03-13-17, 04:41 PM
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I have not seen the arc myself I am too scared to connect the engine and turn the key. Apparently if I start the car the main fuse will blow
Last edited by JC14; 03-13-17 at 04:45 PM.
03-13-17, 05:08 PM
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I see so I would need to go through the whole harness and try to find the path to ground from the positive. I have another question is there such thing as a starter harness? Apparently, that might be my problem. I am truly clueless on the electrical system.
03-13-17, 07:14 PM
#16
The starter has the positive and negative from the battery and also a 12v trigger voltage.
I would start by disconnecting the positive battery and negative cables from the battery and starter and checking resistance to ground for both cables. Checking resistance to ground would be putting the negative ohm meter probe to a known ground point and using the positive to check the other wires.
I would start by disconnecting the positive battery and negative cables from the battery and starter and checking resistance to ground for both cables. Checking resistance to ground would be putting the negative ohm meter probe to a known ground point and using the positive to check the other wires.
03-13-17, 07:50 PM
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The starter has the positive and negative from the battery and also a 12v trigger voltage.
I would start by disconnecting the positive battery and negative cables from the battery and starter and checking resistance to ground for both cables. Checking resistance to ground would be putting the negative ohm meter probe to a known ground point and using the positive to check the other wires.
I would start by disconnecting the positive battery and negative cables from the battery and starter and checking resistance to ground for both cables. Checking resistance to ground would be putting the negative ohm meter probe to a known ground point and using the positive to check the other wires.
03-13-17, 10:43 PM
#18
the only reason the main fuse would blow is if your alternator charge wire was grounded or the battery is reversed.
and yeah, i zoomed in on the picture and the terminal closest to the engine does not appear to have a +, but sure seems to be a -. maybe there is some camera trickery involved, but sure doesn't appear to be.
and yeah, i zoomed in on the picture and the terminal closest to the engine does not appear to have a +, but sure seems to be a -. maybe there is some camera trickery involved, but sure doesn't appear to be.
Last edited by RotaryEvolution; 03-13-17 at 10:46 PM.
03-14-17, 07:00 PM
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the only reason the main fuse would blow is if your alternator charge wire was grounded or the battery is reversed.
and yeah, i zoomed in on the picture and the terminal closest to the engine does not appear to have a +, but sure seems to be a -. maybe there is some camera trickery involved, but sure doesn't appear to be.
and yeah, i zoomed in on the picture and the terminal closest to the engine does not appear to have a +, but sure seems to be a -. maybe there is some camera trickery involved, but sure doesn't appear to be.