Help!!! Melted wire on wiring harness. - Nissan Forum
GA16DE 1.6L Engine Engine Discussion: 91-99 Sentra, 95-98 200SX, 91-93 NX1600

 
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#1 Old Feb 27th, 2004, 11:41 PM
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Unhappy Help!!! Melted wire on wiring harness.

Hey all... today, while trying to start the sentra, a burning smell came through the air vents. Then the car stopped trying to turn over. We popped the hood and found this.



Here is another angle



See the melted black wire? If you're still wondering where this is, it's on the engine harness by the intake tube connecting to the throttle body. In the back, you should see the brake booster.

The car is a B13 Sentra.. of course.. GA16DE... I'm turning to you guys. I don't even know what it is or what it does or what may have caused the wire to melt. We're going to take it in to a shop to have them check it out, but I'd like some help with it before I take it in. Have any of you guys ever seen this before? What is it? What causes it? What would it take to fix this? Any idea what it would cost? Any takers? It looks kinda bad. The car won't start. No noise, no clicking, no nothing. Here are a couple of close ups:




Thanks in advance for any help.... any advice would be greatly appreciated...
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#2 Old Feb 28th, 2004, 06:06 AM
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I don't know what that thing is (my car has it too), but separate and repair the melted wires and look for bare wires. That plug-in thing looks like some kind of fuse.
#3 Old Feb 28th, 2004, 07:21 AM
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Yea just pull that part out and try to run jumper wires, make sure they're thick enough. Also, just a though, by the looks of it you may want to replace your fuel filter.

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#4 Old Feb 28th, 2004, 11:54 AM
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Quote:
Originally Posted by Sanyo
Yea just pull that part out and try to run jumper wires, make sure they're thick enough. Also, just a though, by the looks of it you may want to replace your fuel filter.
LOL... would you believe that's filter is only a year old? It's my bro's car and he never cleans the engine bay. How it get's that dirty is beyond me.

Thanks for the help guys... but any idea what could have caused it? Making the repair on the wire is fairly easy... I'm the son of an electrician.... but what caused it is more my concern... what's to say it's not going to happen again... ya know? Wouldn't wanna make the repair if it's just goin' to happen again.... I wonder if it has anything to do with the starter... I replaced that a couple of months ago.... i need to trace the lines today... rain finally let up....
#5 Old Feb 28th, 2004, 12:14 PM
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check your fuses, you may have a wrong amperage fuse in that circut, because that should have never happened.

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#6 Old Feb 28th, 2004, 12:57 PM
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The way I do shit with wiring and that shit, try and fix it first. If it blows again, THEN go back and find out what was wrong. If just re-wiring it works you didn't spend all that time

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#7 Old Mar 2nd, 2004, 01:40 AM
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if you do ever find out the problem let me know. Right now my poor car is in a parking lot with my window partway down. Could really use the help. Hope you can just rewire no new harness for me thank you. Please update me on progress.

Last edited by 91sentra; Mar 2nd, 2004 at 01:45 AM.
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#8 Old Mar 2nd, 2004, 01:45 AM
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Quote:
Originally Posted by 91sentra
if you do ever find out the problem let me know. my e-mail is wheredipark@hotmail.com. Right now my poor car is in a parking lot with my window partway down. Could really use the help. Hope you can just rewire no new harness for me thank you. Please update me on progress.

harness schmarness...if you repair the wire CORRECTLY where it was messed up, it will work everytime...theres nothin wrong with thte harness itself..its the wirings fault...

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#9 Old Mar 2nd, 2004, 11:20 AM
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Update

After thinking this one through a bit, I've decided to let a pro look at it. I took the car to Harrison's Auto Electric here in town. They've got an awesome reputation. I've worked with many a wire.... and I just didn't feel comfortable repairing the wire without understanding the cause. Also, they told me that the object on the end of the wires is some sort of diode. He didn't know what it belonged to off hand. I'll let ya'll know what happens....
#10 Old Mar 5th, 2004, 04:10 PM
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Finally... a Solution....

Take another look at this pic.



That's a diode on the end. It's fried. The wire right there and down the harness... fried. Damage to other wires. The plug for the diode... fried. The short in the wire was traced to behind the engine where there was major chaffing, a kink, and exposed wire. How that got there... no idea...

Total Cost: $280

After looking at all the damage, I'd rather pay to get it fixed.... expecially since the plug for the diode is fried and the problem is behind the engine... it'd be a PITA trying to fab something to connect the diode to the harness... I hate that. And I hate trying to solder wire in those locations. So they're going to straighten out the kink, repair all the damaged wires, and fab up a connector for a new diode....

hope this helps anyone that's had the same issue... Hey 91sentra... did you figure out what caused your problem?

And that's my 2 cents....
#11 Old Mar 5th, 2004, 09:31 PM
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What is that diode for?
#12 Old Mar 6th, 2004, 01:58 AM
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Quote:
Originally Posted by Matrix021
Take another look at this pic.



That's a diode on the end. It's fried. The wire right there and down the harness... fried. Damage to other wires. The plug for the diode... fried. The short in the wire was traced to behind the engine where there was major chaffing, a kink, and exposed wire. How that got there... no idea...

Total Cost: $280

After looking at all the damage, I'd rather pay to get it fixed.... expecially since the plug for the diode is fried and the problem is behind the engine... it'd be a PITA trying to fab something to connect the diode to the harness... I hate that. And I hate trying to solder wire in those locations. So they're going to straighten out the kink, repair all the damaged wires, and fab up a connector for a new diode....

hope this helps anyone that's had the same issue... Hey 91sentra... did you figure out what caused your problem?
Well I decided to take my car to Wagley Creek Auto and they would look at it for free because we're friends with them. They would then give an estimate on the cost. They looked it over quickly and said they could just splice a fuse connector or something and rewire it for about $120! Good price though and they do awesome work too.the car goes in tomorrow and should be back by Sunday or Monday. Matrix021 thanks for the info, it helped alot and hope it helps others too.
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