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Need some help with my electrical problems

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Old Oct 20, 2012 | 07:53 PM
  #31  
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From: Easton,Ks
Do you mean how does the pins come out of C101?

This is not C101 but it comes apart about the same way.
http://oldfuelinjection.com/index.php?p=74

/
 
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Old Oct 20, 2012 | 07:59 PM
  #32  
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That's right. Bear in mind, I didn't hardly look at the connector. If it's obvious and not worth answering, don't bother. If it requires special tools or it's not intuitive, I'd like to know what to do in case the knowledge would help in the future.
 
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Old Oct 20, 2012 | 08:04 PM
  #33  
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I'm not sure if you edited your post or I just missed your second paragraph. That's exactly what I was looking for. Thanks.
 
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Old Oct 20, 2012 | 08:14 PM
  #34  
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From: Streetman
Fuse "I" does not supply power to the fuel pump.
Fuse "O" is the power supply fuse that provides all the power to run the fuel pumps.

Fuse "I" does send power to pump relay though. I had the same issue on my 88 f350 i found the problem to be the conector for the fuel pump relay was shot and had to be rewiered
 
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Old Oct 20, 2012 | 08:28 PM
  #35  
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Originally Posted by bigberthasdad

I had the same issue on my 88 f350 i found the problem to be the conector for the fuel pump relay was shot and had to be rewiered
I have not even looked at the fuel pump relay. Now that you mention it, I do remember reading earlier in this thread where Dr. Monstaa said he had replaced the fuel pump relay because it had a burn mark on one of the plugs. I guess if the fuse box connection on the coil side of the fuel pump relay was bad enough, it could draw a ton of amperage to make that work. Is that what you're saying? That's a pretty obvious possibility and I had never thought of it.
 
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Old Oct 21, 2012 | 07:49 AM
  #36  
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From: Easton,Ks
Originally Posted by dpilot83
I have not even looked at the fuel pump relay. Now that you mention it, I do remember reading earlier in this thread where Dr. Monstaa said he had replaced the fuel pump relay because it had a burn mark on one of the plugs. I guess if the fuse box connection on the coil side of the fuel pump relay was bad enough, it could draw a ton of amperage to make that work. Is that what you're saying? That's a pretty obvious possibility and I had never thought of it.
If you have a burned socket that would make for high resistance an lower amperage draw and that would case a voltage drop and a high heat point but it would not blow a fuse. It can cause the fuel pump relay not to work at all.
If the wire to the coil socket of the fuel pump relay was shorted to ground or the fuel pump relays coil was shorted inside then that could cause the fuse to blow.
 
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Old Oct 21, 2012 | 07:53 AM
  #37  
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It has failed multiple times since the fuel pump relay was replaced so I doubt the relay was the issue. We'll keep on keeping on with our fuse method I guess. Thanks.
 
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Old Oct 21, 2012 | 07:55 AM
  #38  
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From: Easton,Ks
Originally Posted by bigberthasdad
Fuse "I" does not supply power to the fuel pump.
Fuse "O" is the power supply fuse that provides all the power to run the fuel pumps.

Fuse "I" does send power to pump relay though. I had the same issue on my 88 f350 i found the problem to be the conector for the fuel pump relay was shot and had to be rewiered
Your 88 truck has a complete different set up for the fuel pump and power relays and did not use any fuses. It had fuse links. It was very common for the wiring to go bad under the relays on an 88 and a lot of owners of that year did a mod to install the type of relay we are working with in this thread. The wiring under your 88 relays was open an exposed.
 
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Old Oct 21, 2012 | 09:23 AM
  #39  
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From: Streetman
yes the 88 realys do just kind of lay around on the fender well. I just saw his post on the burnt relay prong and it reminded me of when I was inside the engine compartment with my legs sticking out the hood looking for broken wires on my fuel harness
 
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