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Re: motor will not stsrt, battery checked ok could be...
Depending upon which engine you have the process will be the same only different...! If your radio has an anti-theft code know it before you start. Disconnect positive cable from battery, unbolt starter and disconnect harness wires, making note of where you took them from. Reverse process to install. Sometimes you will find stuff in your way, If you cannot wiggle the starter around obstructions, remove the obstruction. If your vehicle has a starter relay, make sure it is working before taking starter out!!
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I'd bet a bag of popcorn against a weekend at Pizmo Beach that the battery needs replacing or the terminals or connections are corroded.
First step - dis-connect NEGATIVE battery terminal.
Second step - disconnect Positive battery terminal.
Third step - Put battery on charger for at least 3 hours, preferrably overnight..
Fourth - CLEAN all connectors and terminals
Fifth - Re-install battery Connect POSITIVE terminal first and Negative last.
Try to start. If No go, try using jumper cables.
If it starts, Go buy a new battery, and a bag of popcorn.
Could be several problems - check the battery terminals to make sure they are clean. Next check the battery to see if it is fully charged. If both those items checked are OK then the next step is to check the starter.
Now the starter has a selenoid which engages and provides power to the starter motor when you turn the key to the start position.
If you only get a clicking noise then it could be the selenoid valve itself or the starter motor.. Some fords have the selenoid mounted on the firewall others are mounted on the starter motor itself.
So what you need to do next is bypass the selenoid valve and provide power directly to the starter - if the starter turns the engine over then the selenoid valve is the problem. If the starter motor doesn't turn the engine over then it's the starter motor and a replacement is necessary.
Check battery must fully charged, check starter fuse and relay
Check 12 volt wire from ignition switch to starter relay in the fuse box ,then check 12 volt wire from starter relay to starter motor solenoid if if it's everything is ok then change the starter.
if its a diesel the the starter motor will be contaminated with dust from the dual mass flywheel breaking up and will need renewing along with the clutch and flywheel, if it is a petrol check the battery and wiring if thats ok its the starter motor you should also check the battery etc if its a diesel before changing anything
Disconnect the cable from the negative post on the battery. Use a floor jack to raise the car up and use jack stands to support the car. Remove the starter cable and the electrical solenoid motor connector from the starter solenoid.
Step 2 Use a wrench to remove the bolts from lower and upper starter motor mounts. Take the protective cap from the starter motor terminal. Press the retaining tab of the starter motor solenoid terminal connector and pull to remove it. Use a wrench to take off the nut holding the battery cable and take the battery cable off the starter. Usually, these are 1/2 or 7/16th.
Step 3 Take the two retaining starter bolts off, then take the starter out of the bell housing and out of the vehicle. Check the flex plate for damages before putting the new starter on.
Step 4 Place the starter in position and use your fingers to tighten the bolts. Use a wrench to tighten the lower and upper mounting bolts to 16 to 21 foot per pound. Put the starter battery cable back on and use a wrench to tighten the nut to 80 to 123 inch per pound.
Step 5 Put the starter motor connector back on. Push straight on the connector until it clicks, to make sure it's locked in place.
Always start with good clean secure battery terminal connections also check other end of both wires for same. Check battery with a voltmeter. Check trigger wire on relay fro 12v when key is turned to start, check main wire on starter for 12v with key on start. Check battery voltage with key on to start if voltage drops to below 9.5 starter is bad. Before changing starter, make sure you can turn the engine by hand (with key off) If you can't, don't bother with starter. Before beginning any testing battery should also be load tested to make sure it has amperage as well as voltage capacity to start car.
Sounds like either the battery leads are on the wrong way round, or the starter main cable is touching something and shorting to earth. Retrace your steps and check your connection locations.
Either that or its a dead short through the starter. Remove main cable from back of starter and tape up incase of short. then reconnect battery. If ok now then your looking at starter motor.