1989 1/2 ton 2wd cheyenne lost all electric

[MT-2500]

Originally Posted by houndog3

ok i replaced the fuse thats at the left side(#1 position) as soon as i hooked up the battery it burned up....so i take it i have 12v the stud..so what next????

If it blowed/ or burned up fuse you have a dead short.
Did it blow with key on or off?
With fuse blowed Take a 12 bulb test light and confirm 12 volts to that stud.

If 12 volts to it then you need to start looking for your short.
One way to do that is to start unpluging/unhooking stuff that feed from stud.

When hunting for short I always use a circuit breaker tied/wired in where the fuse link that is blowing.
Saves on fuse links and rapid clicking/ circuit breaker tells you you have a short on that circuit.

On the wire/fuse that is blowing try to look and figure out and see where that wire goes.

That stud may feed to altrnator or ign switch or fuse box or even head light switch.
Start unpluging untill you get the circuit that is shorted out.
If short is coming from fuse box pull all fuses and or unbolt fuse box and turn it over and inspect wiring on back side.

Let us know how it goes and what direction the short is.

[houndog3]

yes mt-2500 the key was off!!! what size of auto circuit breaker should i use to trouble shoot this with...thx for you advice

[MT-2500]

Originally Posted by houndog3

yes mt-2500 the key was off!!! what size of auto circuit breaker should i use to trouble shoot this with...thx for you advice

Key and every thing off anything from a 10 amp 40 amp should do it.

[houndog3]

ok this what i got now,iv unplugged the alterntor,fuse box,they are not the cause,BUT WHEN I DISCONNECT the wire that goes from the firewall block to the starter(the one that goes in the tube by the exhaust) i dont have my dead short on my little circuit breaker i rigged up,I ohm that wire to chassis ground it checks good!So that wire or starter has something to do with it.any of you guys have more clues???

[MT-2500]

Originally Posted by houndog3

ok this what i got now,iv unplugged the alterntor,fuse box,they are not the cause,BUT WHEN I DISCONNECT the wire that goes from the firewall block to the starter(the one that goes in the tube by the exhaust) i dont have my dead short on my little circuit breaker i rigged up,I ohm that wire to chassis ground it checks good!So that wire or starter has something to do with it.any of you guys have more clues???

Sounds like something is wired up or hooked up rear end to being backwards.

As asked before are you getting 12 volts to the stud on firewall.

The wire from solenoid to firewall stud should feed 12volts from solenoid big post to the stud.

Will it start and run with wire from stud to solenoid unpluged or get power to ign switch.?

[MT-2500]

Originally Posted by houndog3

ok this what i got now,iv unplugged the alterntor,fuse box,they are not the cause,BUT WHEN I DISCONNECT the wire that goes from the firewall block to the starter(the one that goes in the tube by the exhaust) i dont have my dead short on my little circuit breaker i rigged up,I ohm that wire to chassis ground it checks good!So that wire or starter has something to do with it.any of you guys have more clues???

Unpluging that takes should take away 12 volt power to the stud and whatever it feeds.
So that is probly why you have no short with it unpluged.
You never did tell us what fuse link was blowed or what the blower fuse link feed.

That is first thing to check out.

Have you unpuggd head light and ign switch ?
If not do so to elminated them.

Hook the starter to stud wire back up and chkeck for 12 volts on stud.
Then see if your circuit breaker is triping/shorting.

If so find out where that wire goes because it will lead you to your short.

[houndog3]

im getting closer.that wire is linked to tha altenator,it ohms to the main hot wire,i started pulling it out of the loon and the wire does not go directly to the alternator,it goes around to the back of the motor and heads of to the main plug in at the fie wall....

[houndog3]

yes mt-2500 i have 12v at the stud,no i cant start it because it will pop the circuit as soon as i hook the battery up.That red wire im messin with is linked to the alernator,and that wire is shorted out chassis ground somewhere because it ohm short to ground

[MT-2500]

Originally Posted by houndog3

yes mt-2500 i have 12v at the stud,no i cant start it because it will pop the circuit as soon as i hook the battery up.That red wire im messin with is linked to the alernator,and that wire is shorted out chassis ground somewhere because it ohm short to ground

How are you getting 12 volts to the stud with the battery unhooked or testing for short with battery unhooked.?

Unhook what wire is shorted and then hook up battery and the check the circuit on shorted wire or what ever is shorted.

Any thing that has a electrical circuit to run it will ohm short to ground.

The way to find what is shorted is to run your circuit breaker hooked to batery positive to the shorted wire.

But also remember to use breaker that has the amp ratting that is over the amps pull of the circuit.
Like.
If you hook a 10 amp breaker to a heater blower motor it will start breaking.

[houndog3]

thats what i havebeen doing mt,but not any circuit will show a dead short to ground,it will have continuity in k ohms ,meg ohms, ect but not a 0 ohm thats what i have on that wire,it goes to my + on the alterator,and to the wire bundle box on the drivers side (where the harnass connects to the cab)Also im usung a 20a breaker and when i do hook it up it pops asap with no key on...thx for keeping up with me

[MT-2500]

Originally Posted by houndog3

thats what i havebeen doing mt,but not any circuit will show a dead short to ground,it will have continuity in k ohms ,meg ohms, ect but not a 0 ohm thats what i have on that wire,it goes to my + on the alterator,and to the wire bundle box on the drivers side (where the harnass connects to the cab)Also im usung a 20a breaker and when i do hook it up it pops asap with no key on...thx for keeping up with me

If a wire is shorted out it should show ohms.
ost ohm meters will show ohms if wire shorted or has restiance.
But if you leave ohm meter hooked up it will 0 out and show 0 ohms.

If it is shorted out triping breaker start unplugging what ever is hooked up on that wire untill you have no short.

[houndog3]

all fixed and returned back to my dad!!! it was the alternator wire going back to the cab that was burnt in to another wire!!!! it dont read 0 ohms no more!! thx for all your guys help!!!!!!i wish i could buy you ll lunch or a beer or both...thx a million

[MT-2500]

Originally Posted by houndog3

all fixed and returned back to my dad!!! it was the alternator wire going back to the cab that was burnt in to another wire!!!! it dont read 0 ohms no more!! thx for all your guys help!!!!!!i wish i could buy you ll lunch or a beer or both...thx a million

You are welcome.
And thanks for posting back the fix and how it went.

Good Luck