C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

87 corvrttr melting wires related to fuel pump??

Old 08-12-2016, 09:14 PM
  #1  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default 87 corvrttr melting wires related to fuel pump??

Name:  IMG_20160809_132835 [246258].jpg
Views: 1267
Size:  1.56 MB

Name:  ATT_1471049394131_20160811_084314.jpg
Views: 1854
Size:  4.25 MB

Pulled in driveway puff of smoke no start. Turned out it is the first picture, wire under the battery box melted after the fusible link. Replaced wire. found relays with nasty wires exposed replaced all relays. Didn't use fusible link used fuse. Engine started right up ran for 20 minutes and turned it off. An hour later came out to start it blew 3 s
Fuses when key was turned on, Checked wiring nothing I could find. replaced fuse with fusible link turned key plug that has pencil eraser up against it smoked and burnt plug. Still under battery box. Anyone know what that plug goes to.

Last edited by AJ123; 08-12-2016 at 11:02 PM.
Old 08-12-2016, 09:30 PM
  #2  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Name:  IMG_20160805_211753.jpg
Views: 2196
Size:  2.89 MB

relay I thought may have caused short
all relays and pigtails replaced
Old 08-12-2016, 09:55 PM
  #3  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

http://www.corvetteforum.guru/module...post_id=266428

After first repair with fuse
Old 08-13-2016, 05:31 PM
  #4  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Ttt
Old 08-15-2016, 06:52 PM
  #5  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default



Help please
Old 08-15-2016, 06:59 PM
  #6  
SELLC
Instructor
 
SELLC's Avatar
 
Member Since: Jul 2016
Location: Plymouth MI
Posts: 222
Received 11 Likes on 11 Posts
Default

Your melted wires are the result of a short.

Where it's from I could not tell you, however getting a wire diagram and tracing it back to the effected componet will be in order.

You can order Factory Service Manuals, Chilton's or do what most people with internet access do and buy an online subscription to AllData for your year and model.

I can't make out heads or tales from the photos you have posted, but it seems from what you're saying there is defiantly a short in the circuit. A repair should be as simple as fixing the short and running new cable. Just take it easy and get a manual of some sort.

Last edited by SELLC; 08-15-2016 at 07:01 PM.
Old 08-15-2016, 07:27 PM
  #7  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Originally Posted by SELLC
Your melted wires are the result of a short.

Where it's from I could not tell you, however getting a wire diagram and tracing it back to the effected componet will be in order.

You can order Factory Service Manuals, Chilton's or do what most people with internet access do and buy an online subscription to AllData for your year and model.

I can't make out heads or tales from the photos you have posted, but it seems from what you're saying there is defiantly a short in the circuit. A repair should be as simple as fixing the short and running new cable. Just take it easy and get a manual of some sort.
Thanks I am using the factory electrical service Manuel..
The pencil is at two plugs I don't recognise. The discoloration is from the fire that started there..
I am trying to find out where they go from there

Seriously thank you
Steve
Old 08-15-2016, 07:39 PM
  #8  
WVZR-1
Team Owner

 
WVZR-1's Avatar
 
Member Since: Sep 2003
Posts: 23,046
Received 2,254 Likes on 2,017 Posts

Default

If you have the FSM look in the 8A-201-2 and pages close to that and see if you can ID the component. Look specifically for C100 in the adjacent pages. Look also on 8A-201-6. It's difficult to relate your snapshot to very specific components with just the detail in your snapshot,

I can post those images if you want comments from users. You tell me the pages and mention the component names.

Here's a teaser:

Name:  '87 C100.png
Views: 1985
Size:  78.5 KB

The C100 would have 2 wire bundles going to it. 1 is 25+ and the other maybe 15+. Look on 8A-202-0

Last edited by WVZR-1; 08-15-2016 at 07:58 PM.
Old 08-15-2016, 07:44 PM
  #9  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Spoiler
 
Originally Posted by WVZR-1
If you have the FSM look in the 8A-201-2 and pages close to that and see if you can ID the component. Look specifically for C100 in the adjacent pages. Look also on 8A-201-6. It's difficult to relate your snapshot to very specific components with just the detail in your snapshot,

I can post those images if you want comments from users. You tell me the pages and mention the component names.
Thanks
Book is at shop right now. I will get those sections
Steve
Old 08-15-2016, 09:25 PM
  #10  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Originally Posted by WVZR-1
If you have the FSM look in the 8A-201-2 and pages close to that and see if you can ID the component. Look specifically for C100 in the adjacent pages. Look also on 8A-201-6. It's difficult to relate your snapshot to very specific components with just the detail in your snapshot,

I can post those images if you want comments from users. You tell me the pages and mention the component names.

Here's a teaser:

Attachment 48009836

The C100 would have 2 wire bundles going to it. 1 is 25+ and the other maybe 15+. Look on 8A-202-0
This so far where j connect to m and A is where the first wire orange wire toasted

will be checking c 100
Attached Images
File Type: pdf
Scan_Doc0019.pdf (1.25 MB, 497 views)

Last edited by AJ123; 08-15-2016 at 09:30 PM.
Old 08-15-2016, 10:14 PM
  #11  
WVZR-1
Team Owner

 
WVZR-1's Avatar
 
Member Since: Sep 2003
Posts: 23,046
Received 2,254 Likes on 2,017 Posts

Default

Look at 8A-10-0 the only fusible link that turn into ORANGE from the battery is to the relays (FP, MAF), OPS, ECM. Look to the left side of the wiring schematic for those. All of the rest of the links in that vicinity go to RED wires for Voltage.

Since you've posted a scanned image I guess you've got the FSM in hand. Do you need me to post an image of where I mean?

Last edited by WVZR-1; 08-15-2016 at 10:15 PM.
Old 08-15-2016, 10:40 PM
  #12  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

[ATTACH]48009891 relays and pigtails[/ATTACH]

Name:  20160811_084314.jpg
Views: 3040
Size:  4.25 MB
Originally Posted by AJ123
This so far where j connect to m and A is where the first wire orange wire toasted

will be checking c 100
page 8a201 6

The melted wire the first one to melt is fusible link J where it connects to fusible link A & M. One of those wires shut off power to fuel pump. When I repaired them. replaced plugs and pigtails to mass burn off relays.
Page 8a 201-3 replaced relays and pig tails

page 8A 201 2 replaced coolant fan relay & pig tail, all wires looked degraded

Repaired wire j & M &a put 30 fuse in line engine started and ran fine

an hour later each time the key was turned fuse blue
took that off replaced with fusible link turned key smoke fire
plug c309 or c308which I believe is in picture with pencil is what melted
cant get in there right now

Is this better
Attached Images  
Old 08-15-2016, 11:16 PM
  #13  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Originally Posted by WVZR-1
Look at 8A-10-0 the only fusible link that turn into ORANGE from the battery is to the relays (FP, MAF), OPS, ECM. Look to the left side of the wiring schematic for those. All of the rest of the links in that vicinity go to RED wires for Voltage.

Since you've posted a scanned image I guess you've got the FSM in hand. Do you need me to post an image of where I mean?
If you have time

thanks for help

writing lesson plans for school tomorrow. Hell of a head ache
Old 08-15-2016, 11:20 PM
  #14  
SELLC
Instructor
 
SELLC's Avatar
 
Member Since: Jul 2016
Location: Plymouth MI
Posts: 222
Received 11 Likes on 11 Posts
Default

Originally Posted by AJ123
cant get in there right now
I think once you get into there you'll see the short. Probably a degraded connector that has allowed the terminals to touch or something simple like that.

I think you're heading in the right direction, and getting into that connector looks like the next step.
Old 08-15-2016, 11:32 PM
  #15  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Originally Posted by SELLC
I think once you get into there you'll see the short. Probably a degraded connector that has allowed the terminals to touch or something simple like that.

I think you're heading in the right direction, and getting into that connector looks like the next step.
Thanks I was so frustrated.
Trying to read plug number on page 8a 202 4
C309
Can you make that out
Old 08-15-2016, 11:36 PM
  #16  
SELLC
Instructor
 
SELLC's Avatar
 
Member Since: Jul 2016
Location: Plymouth MI
Posts: 222
Received 11 Likes on 11 Posts
Default

Originally Posted by AJ123
Thanks I was so frustrated.
Trying to read plug number on page 8a 202 4
C309
Can you make that out
I don't have the factory service manual for your model, so I cant speak to page 8a 202 4, we use Mitchells On Demand because we get quite a few different cars come in for service.

I'd just keep digging into wherever that wire goes to and from. It's bound to be there!
The following users liked this post:
AJ123 (08-15-2016)
Old 08-16-2016, 04:38 AM
  #17  
WVZR-1
Team Owner

 
WVZR-1's Avatar
 
Member Since: Sep 2003
Posts: 23,046
Received 2,254 Likes on 2,017 Posts

Default

Originally Posted by AJ123
Thanks I was so frustrated.
Trying to read plug number on page 8a 202 4
C309
Can you make that out
C309 is inside car see 201-6 It's no where near where you're working.

Do you have the left fender panel removed from the car? Take a couple snapshots of the vicinity not close-ups so it's easier maybe to visualize where you're "pointing". How many wires to the connector your eraser tip is on?

Last edited by WVZR-1; 08-16-2016 at 05:16 AM.

Get notified of new replies

To 87 corvrttr melting wires related to fuel pump??

Old 08-16-2016, 08:24 AM
  #18  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Originally Posted by WVZR-1
C309 is inside car see 201-6 It's no where near where you're working.

Do you have the left fender panel removed from the car? Take a couple snapshots of the vicinity not close-ups so it's easier maybe to visualize where you're "pointing". How many wires to the connector your eraser tip is on?
Thanks
I am looking at the area under the battery box..I guess there isn't a diagram showing those plugs.

Thanks for pointing that out. At least I can eliminate that.
Old 08-16-2016, 08:51 AM
  #19  
WVZR-1
Team Owner

 
WVZR-1's Avatar
 
Member Since: Sep 2003
Posts: 23,046
Received 2,254 Likes on 2,017 Posts

Default

Originally Posted by AJ123
Thanks
I am looking at the area under the battery box..I guess there isn't a diagram showing those plugs.

Thanks for pointing that out. At least I can eliminate that.
I understand where you're looking - just remove the fender panel and get some snapshots. The loose connector in the other snapshot you removed from where? It looks like it might have been intended to have been on one of the tails of an OE/GM positive cable. Did you replace it with anything in particular. The first part of your thread seems to be a tough read.

"CROWZ" has I think an '87 and maybe he'll stop by.

Last edited by WVZR-1; 08-16-2016 at 08:52 AM.
Old 08-16-2016, 09:27 AM
  #20  
AJ123
Racer
Thread Starter
 
AJ123's Avatar
 
Member Since: Sep 2011
Location: Bakersfield Ca
Posts: 400
Received 5 Likes on 5 Posts

Default

Originally Posted by WVZR-1
I understand where you're looking - just remove the fender panel and get some snapshots. The loose connector in the other snapshot you removed from where? It looks like it might have been intended to have been on one of the tails of an OE/GM positive cable. Did you replace it with anything in particular. The first part of your thread seems to be a tough read.

"CROWZ" has I think an '87 and maybe he'll stop by.
If your talking about the Orange wire that is melted it is back to original

Work starts today so I can't get to the vet it is in my friends shop.
Hope to have time sat. thanks

Thread Tools
Search this Thread
Quick Reply: 87 corvrttr melting wires related to fuel pump??



All times are GMT -4. The time now is 07:35 PM.