Bascially i ordered a battery junction box off the forum and that part litterly FRIED the plastic had hole melted through it and 3 of the wires look fine and 1 is kinda ify... but this a picture with it installed.. Can someone tell me if a peice may have been missing like a circut breaker of some sort or what cuz to much current went through and fried that junction box i believe i didnt recieve everything that is suppose to be with the junction box... Thanks fiero forum here is a pic before it Melted and stuff

PS the Top wire took the damage and the prong melted out of the Plastic box

[This message has been edited by Ton0219 (edited 05-24-2009).]

Sounds like one of those wires or posts may have been grounded turning to junction into a fuse. Theres not really anything else to them.

There is supposed to be a flat metal bar linking the two posts together

Well when i got it and it was only the box and 2 post there was no bar or anything between them

Never looked close enough at any of mine to see if the connecttion between them is visible. If it is, and yours is missing, that makes the fact it heated and melted even more unusual. Are you sure that there wasnt exposed metal on the back that could have grounded when you mounted it ?

Well all that was on it was a little rod looking thing around both post as if they wrapped a paperclip around the 2 post??? would that have done it??? That the only unusal thing i saw on the Junction box im guessning that shouldnt of been there if it was a paperclip or some sort of thin rod metal wrapped on both post to connect them

It's like 2farnorth said. The two terminals have to be linked together. The stock junction box is linked on the visible side, and the screws that make up the two posts do not protrude through the back side so there's not real danger of it shorting out against the mounting surface unless the posts somehow got punched through the plastic.

Sounds to me like you had a short in one of your circuits that are fed by one of the four fusible links there. One feeds the ECM, another the alternator, another the headlight actuator relays, and the last one feeds a bunch of fuses in the fuse panel. I would start looking for shorts or a burnt fusible link in the alternator circuit and the headlight circuit first.

quote Originally posted by Ton0219: Well all that was on it was a little rod looking thing around both post as if they wrapped a paperclip around the 2 post??? would that have done it??? That the only unusal thing i saw on the Junction box im guessning that shouldnt of been there if it was a paperclip or some sort of thin rod metal wrapped on both post to connect them

Sounds like you might have answered your own question there.

Put enough amps through a small enough conductor that doesn't melt right away and you have a pretty good toaster heater element....

[This message has been edited by randye (edited 05-24-2009).]

In the stock fiero wiring, one of the wires contains the end piece that connects those two studs in the junction... it is a steel strap with 2 holes. This connection is part of the wiring, not the junction itself.

quote Originally posted by fieroguru: In the stock fiero wiring, one of the wires contains the end piece that connects those two studs in the junction... it is a steel strap with 2 holes. This connection is part of the wiring, not the junction itself.

I'd forgotten that. Is it the wire from the positive battery terminal?

edit: Went out and looked at my coupe and it appears to be attached to two wires coming off the harness to the bottom post

[This message has been edited by 2farnorth (edited 05-25-2009).]

Yes, there is supposed to be a flat link piece that connects the two terminals. Look at the bottom center red wire, someone removed the flat link when they put a new ring terminal on.



I'm wondering fi you fried the junction box because the electricity didnb't have any place to go to, IE. alternator regulator . If you fried the electrical as you mentioned, you need to double check that first. Look for chaffed wires rubbing against ground, crusty fusable links and check to make sure that you have the correct amperage fuses in the fuse box under the dash.

In my case, the flat link was so degraded that I added a fusable link wire to complete the circiut from the top to the bottom post on the junction box on the right hand side. This is not a stock configuration, do that at your own risk.

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jetman
Silver 86 SE 2M6 4-speed, with "check wallet light"
Now fortified with 8 essential slices of bacon goodness

quote Originally posted by 2farnorth: I'd forgotten that. Is it the wire from the positive battery terminal? edit: Went out and looked at my coupe and it appears to be attached to two wires coming off the harness to the bottom post

It is part of the alternator wiring: