Help please won't run

[bigblock79]

The other day i was comeing home. it shut off like if i had turn the key off. i got out and the big starter wire from the battey to the starter was burned to the header pipe. i pulled it off and it was not harley burn thru the red cover on the wire. i lost all power to every thing. what do you thank it is. thanks for the help. and the small wires ant burn none.

[sick69]

Start looking for the fusable link thats toast. I had several problems with the one at the starter due to heat issues. Might be a good place to start the search.


Frank

[xtreme80]

Originally Posted by sick69

Start looking for the fusable link thats toast. I had several problems with the one at the starter due to heat issues. Might be a good place to start the search.


Frank

[BabyBlue]

If the fusable link is fine then replace the battery. I had the same thing happen to me about 100ft from my house after trying out some new headers. Headers burned through the insulation on the positive cable to the starter and fried the battery. I replaced the battery and the cable the next day and everything worked fine.

[bigblock79]

the battery is still good. it still wont do nothing. i guss i got to change some wires out how does the wireing are to be on a 73 any got a wireing table

[xtreme80]

Originally Posted by bigblock79

the battery is still good. it still wont do nothing. i guss i got to change some wires out how does the wireing are to be on a 73 any got a wireing table

You should only have one main wire running from your battery to your starter, then everything breaks off of there.

[72lb4x4]

Shorting the big battery cable will create a lot of current through the big battery cables, and possibly fry them, or the battery...

What's the voltage measured accross the battery?
If its around 12.5V, I'd be looking at a bad cable connection, or fried big battery cable.

What's the voltage measured from the connector block on the fender near the battery to ground? I'm assuming there is a connector, but I haven't looked under the hood of a 73 in a lot of years.

[bigblock79]

battey is good. the cable is good. the starter is good. i dont have power on nothing

[xtreme80]

Ignition switch maybe? You may have fried the ignition switch, and even though you turn the key on, there's no power going through the switch to allow anything to come on. Time to get out a test light and multimeter and start testing things. Once you get to the ignition switch make sure it's got power to it using the test light. If it does, but the accessories don't have power once the switch is on, I would try replacing that.

[bhunt31]

Originally Posted by bigblock79

battey is good. the cable is good. the starter is good. i dont have power on nothing

should be a fuseable link mounted high on the firewall behind the distributor, did you check it?

[72lb4x4]

So no lights or horn?
What makes you think the battery is good?
What makes you think the "cable" is good? I guess you mean the big cable that got melted to the header?
What about all the other cables you've been asked about?

[89 crew]

Also check the post on the fire wall. On my 90 burb it had intermittent connection there made it quite the pita to track down.

[bigblock79]

So no lights or horn? No
What makes you think the battery is good? Tested it
What makes you think the "cable" is good? I guess you mean the big cable that got melted to the header? tested it to. volts is still going thur it and it only melted barely thru the cover
What about all the other cables you've been asked about? test them. and i put a jumper wire to get pass the fuseable link. it is dead no volts going past the wire on the junction block on the fire wall. i got fire to ther and thats it

[xtreme80]

Originally Posted by bigblock79

So no lights or horn? No
What makes you think the battery is good? Tested it
What makes you think the "cable" is good? I guess you mean the big cable that got melted to the header? tested it to. volts is still going thur it and it only melted barely thru the cover
What about all the other cables you've been asked about? test them. and i put a jumper wire to get pass the fuseable link. it is dead no volts going past the wire on the junction block on the fire wall. i got fire to ther and thats it

Did you check the ignition switch yet?

[72lb4x4]

Assuming "nothing" means nothing, his headlights, horn, brake lights, etc. don't work. Since these don't need the ignition switch, its not likely the problem.

If he shorted the big starter cable to a header, the current is going back through the block through the ground cable to the battery. Thus, its probably not something on the low current side of things...

[xtreme80]

Originally Posted by 72lb4x4

Assuming "nothing" means nothing, his headlights, horn, brake lights, etc. don't work. Since these don't need the ignition switch, its not likely the problem.

If he shorted the big starter cable to a header, the current is going back through the block through the ground cable to the battery. Thus, its probably not something on the low current side of things...

Didn't think of that... my mistake.

[bigblock79]

ok i got power back to the firewall junction block. thats as far as it goes. it don't go pass that. i got a jumper wire on it and it still don't go no father. could it be that little junction box it self. i thought a jumper wire would solve that. it got me stump. thanks for all the help

[89 crew]

My burb lost it in the wire- terminal on the firewall. check incoming and out going. it either has to be wire-terminal, or resistance between terminal and post.