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Old 04-03-2011, 02:41 PM   #1
4matty3
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truck wont start help

at the sellers house it started up fine, with the help of a jump. as soon as i got it home to start it up, it wouldnt. So then i put my jumper cables on it and then the wires started to smoke and bubble up( the ones on the battery). now nothing happens when i turn the key.any ideas what i can check or look for??
also i thought black was negitive???


also heres the one of the wires that bubbled. i replaced one that was terrible but it didnt do anytihng


anybody have any idea?? i dont know where to start
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Last edited by 4matty3; 04-03-2011 at 02:42 PM.
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Old 04-03-2011, 02:47 PM   #2
QKENUF4U
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Re: truck wont start help

positive goes to starter
negative goes to ground
not sure what the small red wire is for (resistor ?)

looks like you got jumper cables backwards to me...

check all fuses...
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Old 04-03-2011, 03:27 PM   #3
4matty3
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Re: truck wont start help

ya i had it backwards. (what an idiot). think i did any damages? thanks
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Old 04-03-2011, 03:45 PM   #4
don t. - 72gmc
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Re: truck wont start help

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Originally Posted by 4matty3 View Post
ya i had it backwards. (what an idiot). think i did any damages? thanks
It all depends how much and from where you let the smoke out(grin).
Since it did run, air and gas should not be an issue.
Get a good/better battery, clean up the connections and follow the spark or more like where there is no spark. Look for more "bubbled" wires, tape as you go for now.

HTH..good luck...don t. ....
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Old 04-03-2011, 04:05 PM   #5
GASoline71
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Re: truck wont start help

You can't go by wire color on used trucks this old. Lots of "creative" wiring is usually from PO's. Always see where the pos and neg is on the battery.

Gary
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My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

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I would never rebuild a 305.
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I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
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Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
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Old 04-03-2011, 04:31 PM   #6
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Re: truck wont start help

you will most likely need a new alternator and if it has an HEI the module will probably need replacement also. neither of these components will generally survive reverse polarity application. and any wiring that shows bubbles in the insulation needs to be replaced.
and check all fuses.

Last edited by Rooster's 67; 04-03-2011 at 04:32 PM.
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Old 04-03-2011, 04:34 PM   #7
GASoline71
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Re: truck wont start help

Also check your voltage regulator.

Gary
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My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

Quote:
Originally Posted by LONGHAIR View Post
I would never rebuild a 305.
Quote:
Originally Posted by prostreetC-10 View Post
I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
Quote:
Originally Posted by Marv D View Post
Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
Quote:
Originally Posted by cableguy0 View Post
Its cheaper to listen to advice given when you ask for help than it is to ignore everyone and wait for carnage.
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Old 04-03-2011, 05:12 PM   #8
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Re: truck wont start help

OOPPSS! I hope you get it all figured out!!

Good luck!

Keith
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Old 04-03-2011, 06:57 PM   #9
4matty3
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Re: truck wont start help

I did get it figured out! finally it starts up, just replaced the bubbled wires and hooked it up to a battery charger. now all it needs are some brakes. then i can somewhat drive it/move it around.
heres a video of it running and how bad of shape its in, hopefully by the end of summer it will be somewhat decent.
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Old 04-03-2011, 07:11 PM   #10
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Re: truck wont start help

I was thinking - that's not so bad - but, the bed IS bad - but it did remind me of how much I miss the sound of my old truck (20 years ago).... been running around with a 6 for a few years now...sigh... A little soap, a little sandpaper and touch up, toss a blanket over the seat, some plywood in the bed (minus the extra steel), get it road safe and drive the bejeepers out of it.
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Old 04-03-2011, 07:48 PM   #11
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Re: truck wont start help

thats what im planning for. a little hard work and hopefully ill have a decent truck
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Old 04-03-2011, 09:56 PM   #12
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Re: truck wont start help

the battery cables I'm not one for those cable attacher's I like the Lead one that are all one battery cables.There better ground You might want to go down and buy some sea foam its will help you engine and your oil and make it idle better And if you have miles on that engine Best off to Use a Can of ( Restore ) it comes in a chrome can here is a picture
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