My 2000 mercury mountaineer wont start. I drove it 2 hours started and stopped a couple of times on the way normally. I turned off the car at destination for maybe 10 minutes and turned back on but the radio didnt work. Tryed to turn back on and nothing but a click sound. The radio works along with everything else like normal. There is a clicking sound in the fuse box under the hood and at the starter. Ive tried the battery, messing with the relays and hitting the starter while someone turns the key. Which relays should I replace and what else may be the problem?

SOURCE: 2001 Mercury Mountaineer won't start

Have a load test done on the battery. If it checks out good, take a voltmeter to the battery and have an assistant rotate the engine. If you see more than a 2 volt drop when the car is being started, the starter is heading south.

SOURCE: 2001 jimmy not starting

You can try this==== take a screw driver and tap on the relay switch with the handle while somebody is turning the ignition. This is only a test, not a definate solution. If you haven't already, check the starter solonoid. My opinion, if the ignition was bad, it wouldn't even click at the relay, but without testing it's hard to say.

SOURCE: 2003 Mountaineer won't start, battery is good.

CHECK BATTERY CABLES AND FOR CORROSION,A BAD GROUND OR BAD CONNECTION WILL CREATE ENOUGH RESISTANCE TO PREVENT STARTER TO CRANK OVER ENGINE. IF BATTERY HAS 12V DOESN'T MEAN IT'S GOOD,IT COULD HAVE ON 100 CCA'S, NOT ENOUGH.

SOURCE: 2007 mercury milan V6 Car wont start. Jumped it

Remove the lugs at the battery. Clean the posts and the lugs - then reconnect. Your battery won't charge (and the jumpers won't work) largely because of a film on the + post and lug. If you live in a hot summer area, (Arizona) the problem is especially troublesome.

SOURCE: The battery is new. 93 4runner.

Check that both terminals on battery are clean and tight. Then ensure other end of small positive wire from battery and engine earth are clean and tight.