Car won't start

[bmd107]

Everytime I turn the key over it acts as if I have no life in my battery. I have had the battery and alternator tested and both are fine. What would cause my exp to do this. It is a 91 explorer sport. All positive help is needed. Thanks.

 

[Alec]

probably bad battery cables and/or connections.

 

[bmd107]

I just replaced the negative last night and I started fine all day and then just a minute ago I went to start it and I get no power when I turn it over to start or when I turn it back to listen to the radio. Could my ignition switch have anything to do with this. If so is it hard to replace.

 

[TPLYNCH]

Check your Pos cable. They rot on the inside, especially on the First Gen Explorers