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Old November 9th, 2008, 10:09 AM   #1
mudchucker
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Default starter relay?

Hey guys, i have a 5.0 mustang in my YJ and i drove it into the garage no problems at all. The water pump was leaking so i changed that out and now i can't get it to start at all. No spark. I replaced the coil and condensor, but still nothing. The one thing i have noticed is before when i would turn the ignition to on, there would be a clicking noise, and i assumed that was the starter relay,but now there is no clicking. My big question is what exactly does the starter really do, and if it went bad would the engine still turn over?

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Old November 9th, 2008, 10:50 AM   #2
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Start with your ignition switch under the steering column and make sure that is functioning properly. If the switch is bad, the relay on your fender will not get the "start" signal. If your switch is good, trace the wires up to the fender solenoid. You can try and jump from the positive to the small terminal that your ignition switch goes to.
Depending on whether or not its an automatic, check either the neutral safety switch, or check the clutch switch.



Of course if this is a stick, you will want the parking brake on and the truck in neutral. If it is automatic, you still want to block the wheels for safety.


The purpose of the fender relay is to handle the huge amount of amps going directly to the starter, and is controlled by the "Start" function on the ignition switch. The rest of the vehicle is contolled by the run or ignition function of the switch which supplies power to the fuse box. When power is cut from the fuse box, it cuts power to the computer, fuel pump, injectors, distributor etc, thus shutting the engine off.
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Old November 9th, 2008, 11:45 AM   #3
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Quote:
Originally Posted by Never_Evil View Post
Start with your ignition switch under the steering column and make sure that is functioning properly. If the switch is bad, the relay on your fender will not get the "start" signal. If your switch is good, trace the wires up to the fender solenoid. You can try and jump from the positive to the small terminal that your ignition switch goes to.
Depending on whether or not its an automatic, check either the neutral safety switch, or check the clutch switch.



Of course if this is a stick, you will want the parking brake on and the truck in neutral. If it is automatic, you still want to block the wheels for safety.


The purpose of the fender relay is to handle the huge amount of amps going directly to the starter, and is controlled by the "Start" function on the ignition switch. The rest of the vehicle is contolled by the run or ignition function of the switch which supplies power to the fuse box. When power is cut from the fuse box, it cuts power to the computer, fuel pump, injectors, distributor etc, thus shutting the engine off.


Ok, so if the engine is turning over, then my ignition switch is working correct? and if there is no power from the fuse box through the relay, then the motor should not turn over? If i am following this correctly. The engine does turn over, but no spark at all. Would the starter relay make the tick tick tick noise when the ignition is in the on position? or is that something different?

thanks
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Old November 9th, 2008, 11:55 AM   #4
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If your engine turns over when you try to start it, your problem is not likely to be the starter solenoid.

The clicking noise that you usually hear, but no longer do, could be the fuel pump for your fuel injection.

The first order of business is for you to determine if you have an ignition problem or a fuel delivery problem.
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Old November 9th, 2008, 01:25 PM   #5
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I need to know if you have a fuel injected 5.0 or a carburated 302. If you have no spark, also test your ignition module.
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Old November 9th, 2008, 02:08 PM   #6
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I need to know if you have a fuel injected 5.0 or a carburated 302. If you have no spark, also test your ignition module.
It is fuel injected, and the fuel pump and everything is working. I have 40 PSI of pressure at the rail intake. How do i test the ignition module? I assume that is the one that plugs into the distributor? I have an MSD distributor and the module is supposed to be guaranteed for life, but i guess that could be what it is. The tick, tick, tick is defintiely not the fuel pump. Before installing the 5.0 that noise was not there, and the ticking was coming from the engine compartment. One time before when the ticking was gone i replaced the jeep starter relay from the fuse box and it fired right up, but i tried that again and it didn't make any difference. Will a ford starter solenoid make any kind of clicking noise?
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Old November 10th, 2008, 08:39 AM   #7
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Ok guys, i got it running. The main fuse block from the jeep had a wire from underneath that came loose. The wire went to the auto shutdown relay on the jeep side, which makes the clicking noise i hear. So long story short, the green beast runs for another day-LOL.
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Old November 10th, 2008, 08:43 AM   #8
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good to see you figured it out!

Was the wire a press in deal and just slipped out?
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Old November 10th, 2008, 02:41 PM   #9
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good to see you figured it out!

Was the wire a press in deal and just slipped out?
It was a press in deal with a clip that slides onto the end of the relay, just somehow worked it's way loose. Those are the things that can drive a person crazy.
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