Helping a friend with his 1999 Ford taurus. Need to know about wiring for the starter.I have positive wire from battery to starter and a wire that runs from the starter selinoid into a wire loom.I'm assuming this other wire should be hot when key is in start position. All lights and accessories work but starter will not engage and turnover engine.
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Re: 1999 ford taurus starter will not engage
Hi and welcome to FixYa,
To my knowledge, you assumption is correct on most designs. That wire should go to the ignition switch and will be hot when key is in START. However, same wire often would be connected first to a relay that is interlocked with some conditions/status other then key to START. They would be:
automatic transmission should be in neutral/park with light indicated;
alarm/security/immobilizer is inactive/OFF.
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Just to the left of the battery is the main fuse junction box and below that under the manifold is the starter with the solenoid on top with the positive cable going to the starter check for a loose connection, and the battery ground sould be right there nearby the starter grounded to the block check it also. You could have a bad cable although it may look okay under the insulator the copper cable may be damaged test with a volt meter while moving the pos and neg cables at both ends.
Hello, Take the small wire off the Starter relay and then use a testlight or Voltmeter to test the small wire by attaching one end of your gauge to a ground and the other to the small wire from the relay. It should have no power until you turn the keyswitch to start. If it does have power at other times that is part of the problem.
You have an Interlock switch on the Brake pedal lever under the dash. A lot of times a foot can hit this switch and break it and wires inside can jump and fuse together. Your ignition switch also has adjustments on the column on some models, so when you replace the switch; the rod or cable the switch connects to has to be the correct length. You determine this length by trial and error so that when the Keyswitch is in the START position, the small wire will have power.
With the constant cranking of the starter, I would replace the starter solenoid before attaching the small wire to it. Now that you are positive the small wire is working only in the START position when you attach the small wire the starter should not crank until you want it to.
I hope my solution is very helpful in fixing your Taurus.
more that likely the starter wire is broke or loose. there is 2 red cables that come out of the battery 1 goes to the fuse box under the hood and the other goes to the starter. its covered by wire loom that you have to take apart and look but that like of taurus are commonfor that. i would start with that
if u can gain access to the ignition switch wiring use a testlight and probe each wire while turning the ignition at start position.one of these wires shld have power during starting position and release it again to confirm.this wire goes directly to the trasmission multi lever position swicht (mlp).this MLP is mounted just outside the transmission shifting lever ganged together.Trace the corresponding return wire using the testlight. You may need someone to help you do the job.The return wire usually go to a relay on your fuse box on the engine compartment.Then from relay to the starter.
I would look at the positive cable at the battery and at the starter. Pull the cabel off and a continuity test to see if the wire has a internal break if the wire gets even a pinhole it can build corrosion on the inside of the wire and when a current is put through it it seperates (from the resistance and arc from corrosion) causing the wire to seperate internaly.
You need to see if the battery is holding 11 volts or more while trying to crank it over. If it is, then you need to see if the same is getting to the starter motor. If the voltage looks good at the starter, the starter is bad.
At the starter you will have a larger wire from the battery, that always has positive voltage, and a smaller wire that has positive voltage only while trying to start it.
It should use fuse location 22. The fuse panel is located below and to the left of the steering wheel by the brake pedal. Remove the panel cover to access the fuses. To remove a fuse use the fuse puller tool provided in the fuse panel cover.
The black wire is always the ground. Ford used an assortment of color stripped wires for positive.