No electrical power

[Stevenm]

This morning I went to start my 85 Suburban and all sounded good very briefly then nothing. I have dual batteries fully charged in 6.2 diesel, i turned the ignition on heard the buzzing waited glow plugs lit up then I turned it over. The starter turned the motor for a single rotation then nothing. I turn the key off and on and nothing. The buzzer does not work it basically seems like I disconnected both batteries and not even the headlights work. Just wanted to see if anyone has some ideas where to start looking as this has been very reliable up until today.

 

[74 Shortbed]

First thing check all grounds and for loose connections..

 

[Stevenm]

First thing check all grounds and for loose connections..

Okay thanks will do

 

[Stevenm]

Cleaned off the battery terminals last night, tightened all the grounds and it started right up. Thanks 74 Shortbed fo the suggestion.

 

[74 Shortbed]

Quite welcome, glad to hear it's up and running..