Need help Seriously

[sinner7773]

hello all im so mad and confused right now just need some advice my 1986 suburban 350 hei 700r4 started and ran fine twice this morning and then the third time after my shower it didnt it just lost all power no lights clicking nothing so me thinking it was a dead battery swapped it out with one and same deal like it just drained everything so thinking that bat was dead to i went for a third put it on a charger it read 70% so threw it in real quick and same deal it had acted funny a week ago like it was hard to turn over the first turn then once it made it slowly through the first rotation it cranked right up no problem did that a couple times then stopped doing it any suggestions before i start throwing parts at it for no reason im thinking the started is messed up and pulling all of the current to it whin i turn the ignition but i just want my baby fixed but to frustrated to think its been 5 hours in 100 degree heat and im tired thanks

 

[Confedneck]

put your voltmeter on the positive and negative of the battery, have someone crank the truck and see what the voltmeter drops to. Willing to bet on bad starter if the cables aren't corroded.

 

[Bent77]

Do any of the other elec items work? I would look for a bad battery cable, both terminals and their tie-ins.

If everything else Elec works, would eyeball the solenoid. Had same problem due to solenoid, try taping it see if it spins.

Third, maybe ig switch on column...not the key part the actual switch above the pedals

HTH

 

[YZEATER]

check voltage to the starter, then to the juction box on the firewall. all your power comes from the starter lug.

 

[Blue85]

Maybe you should avoid showers?

 

[Blue85]

Remove the ring terminals from the starter and clean them. Then check the fusible links there. Clean up the ring terminal on the negative battery cable. Usually when you lose everything it's just a bad connection. The classic symptom is when everything seems to work (like dome lights, etc.), then it all dies when you try to start it.