1984 chevys

[goaatman]

i have 2 84 chevys 1 is diesel and other is gas short bed both are 2 wheel drive drove the gas today and came home and parked it and now it wont do a thing got battery charger on it and still wont do a thing even the lights wont come on with the charger on buzzers or anything gauges dont come on and i parked the diesel last week and it wont do anything either but test light shows that the battreies on both have atleast some power but nothing on either works anybody have any ideas on what wrong or what i need to check
thanks for any help

 

[GEN-IV]

Go to Radio Shack
buy a $10 voltmeter
Post once you have.