FICM voltage
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FICM voltage
I have read the test procedure but it is not clear to me as to what the voltage should be on the left pin in the 4 pin row on a 7 pin ficm while the truck is running. It reads 47.7 volts with the key on and about the same while cranking but drops to about 19 volts while the truck is running. One post (ficm Repair post) says to check while running and the ficm test post says to check while cranking and key in on position but nothing about running. I am confused. Is the running voltage correct?
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From: Moyock, NC
Don't forget to post back your results. These testimonies help others.
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I will post back after I do the repair. It looks like it will be monday. Sure would be nice if it works. I'll let you know.
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From: Oaks,PA
Make sure you disconnect power first before you start unplugging/ plugging in electronics. Don't ask how I know. 
Make SURE you follow the instructions also. Theres many little parts in there, it is intimidating. Well, at least for me it was. Good luck, and post your results. Brickie has done 2 of them with success, I'm sure he can help if you have any questions. He helped me!
Make SURE you follow the instructions also. Theres many little parts in there, it is intimidating. Well, at least for me it was. Good luck, and post your results. Brickie has done 2 of them with success, I'm sure he can help if you have any questions. He helped me!
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Make sure you disconnect power first before you start unplugging/ plugging in electronics. Don't ask how I know. Make SURE you follow the instructions also. Theres many little parts in there, it is intimidating. Well, at least for me it was. Good luck, and post your results. Brickie has done 2 of them with success, I'm sure he can help if you have any questions. He helped me!
Make SURE you follow the instructions also. Theres many little parts in there, it is intimidating. Well, at least for me it was. Good luck, and post your results. Brickie has done 2 of them with success, I'm sure he can help if you have any questions. He helped me!
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Well I broke a small Capacitor off the board trying to clean the damn gummy crap off
. So I figure I might a swell not bother going any further. I can't find the capcitor, it is tiny. It is one of two that are at the end of the cucuit board near the screw hole. Guess I need a new ficm. If i can find a used one will it work without any programming?
. So I figure I might a swell not bother going any further. I can't find the capcitor, it is tiny. It is one of two that are at the end of the cucuit board near the screw hole. Guess I need a new ficm. If i can find a used one will it work without any programming?
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From: Oaks,PA
If you get one from a salvage yard the same year as yours I think yes. Maybe someone else will chime in, but maybe the ones from Swamps or PHP might be good to go? If they have any that is. Maybe call them, its a weekday so you might have more success than I did as I boogered mine on a Sunday 
Keep us posted! I hope you have better luck than I did, mine was towed to the dealer Mon morning and I didn't get it back until Fri afternoon.
Keep us posted! I hope you have better luck than I did, mine was towed to the dealer Mon morning and I didn't get it back until Fri afternoon.
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I found the pin head size capacitor that broke off and was able to solder it back on. Then I did half of the repair (the smaller solder joints). My solder iron wouldn't get hot enough to melt the larger points. Crazy thing is that I put it back together and started the truck. It ran a little rough, I shut it down and pulled the codes (P0603 and p1000). I cleared the codes and started the truck again. This time it ran smooth. I shut it down and checked the codes again and it only came up with P1000. No low voltage codes at all 8 cylinders like it was before I pulled the ficm. Maybe I fixed it. I guess I'll have a better Idea in the morning when it has sat over night.
Last edited by goneinsixty; Dec 28, 2009 at 06:42 PM. Reason: mistake
