My 1999 ford explorer won't start. Battery and alternator are good

Does it turn over or is it completely dead? The more information you give us the better advice you will get!

Will not crank over at all? Or engine cranks over but not start? Big difference we need to know

I was not repeating you answer FoR... we were posting at same time

It will not turn over at all. The lights and wipers come on

Have you checked the starter? Clean the battery terminals and the battery cables and if the battery cables are bad then replace them. If you jump the car does it start or turn over?

Sounds like your main ignition relay underneath the hood.

It won't even start with a jump

Is the main ignition relay something I can fix myself

My battery is only 3 months old

If it won't even turn over with a jump I would have the starter replaced or checked out. If you can take it out yourself most auto parts stores can check it for you.

After you do what Full_of_Regrets suggested, which is good advice, if it still does not turn over use a jumper cable from Red+ battery post directly to starter Pos+, where the big cable attaches, by-passing solenoid and see what happens. I assume this is automatic transmission. If it's not, forget that you can run over yourself if it catches

I will try everything that was suggested. Thank you all very much!

It's plugnplay, basically.

http://justgivemethedamnmanual.com/ford/1999-ford-explorer-owners-manual -- Page 185 - download that and it shows relay #5 starter relay /ignition switch

Get an multimeter and pull the relay and check it

That is good suggestion from Maxizwell

Ford - There are several identical relays in the relay box. All you have to do is swap them around to see if it is a bad relay. No testing required.

It start but when I crank it, it won't start

Mine will turn over and just don't crank I got a fully charged battery in it

I drove in 2nd gear 65 70 miles an hour shut itself off it was smoking and I probably did that for about 5 smiles it has fired it turns over but it won't start please help

All the lights turn on but no crank