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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

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Old Jan 8, 2016 | 04:04 PM
  #11  
ionlydrivefords's Avatar
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light probe. there is no power to the coils for some reason
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Old Jan 8, 2016 | 04:40 PM
  #12  
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You need a special test light for the coils. A regular 12v test light will not work in most cases. You will overload the light and it will either blow or just not read correctly.

The reason I am asking is because, baring a lightning strike, all your coils do not go bad at once. And if indeed all the fuses are good and you have checked your inertia switch then one of two things is wrong,

You have a bad tester for the coils and this is actually a fuel related problem or

You have a sever in the lines to the coil or in the loom somewhere.
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Old Jan 8, 2016 | 06:31 PM
  #13  
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He only has 2 coils. It's an early 4.6l. 3 wires to each coil. 1 wire will be constant power, red wire. Other two wires should be PCM ground to fire the coil. Can be checked with a test light. Make sure you have constant power on the power side cranking. Check the ground trigger while cranking. If it lights up test light, should be sparking.
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Old Jan 8, 2016 | 06:47 PM
  #14  
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Originally Posted by TRD-Toy
He only has 2 coils. It's an early 4.6l. 3 wires to each coil. 1 wire will be constant power, red wire. Other two wires should be PCM ground to fire the coil. Can be checked with a test light. Make sure you have constant power on the power side cranking. Check the ground trigger while cranking. If it lights up test light, should be sparking.
Exactly! The OP clearly stated its a 97. :rollingeyes
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Old Jan 8, 2016 | 09:47 PM
  #15  
ionlydrivefords's Avatar
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i will check back tomorrow. thanks for the help. still trying to figure this out. be back at about 9am if anyone willing to still help me out here.
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Old Jan 9, 2016 | 10:14 AM
  #16  
Mr. Beef Gravy's Avatar
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Originally Posted by screamineagle
Exactly! The OP clearly stated its a 97. :rollingeyes
Relax, I know that, I think he was checking them at the wire input. Thank you though for your helpful input
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