Relay and Fuel pump bad at the same time?

ShldveKeptTheFord

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Well this is a fun first post here. My truck is a 2014 2500 Tradesman with the 6.4l Hemi. A few weeks ago I was having trouble starting it, it had the crank no start issue going on. I read up on forums and watched on Youtube about the fuel pump relay going bad, So the next morning it wouldn't start I tried heating up the fuse box a bit with a heat gun and it started right up and I drove it all day. That day I went to autozone and got the wires and fuses to make a bypass wire for the fuel pump relay and installed it and everything was good, I made sure I used the jumper wire to test and see if I could hear the fuel pump turn on and I could. This last week I again had the crank no start issue but I opened the hood and just wiggled the jumper wire and then the truck would start right up. Yesterday and today I can not get the truck to start. I tried wiggling the wire, making a new jumper wire, testing the fuses on the jumper wire, smacking the fuel tank with a mallet, and I cannot get the fuel pump to turn on. Ive tried searching forums and I haven't read anything about the relay and the fuel pump going bad at the same time, So is there anything else I'm missing or that I can check before I order a new fuel pump? I already ordered a new TIPM from TIPMrebuilders before this issue started this weekend. Any help would be greatly appreciated!
 

Burla

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For sure a short in anything can foul a part like a fuel pump, in fact it is likely. So yes if the short is in TIPM it is very possible that a fuel pump will burn out and keep burning out until you fix the short. I had this happen once with a transfer case, had to replace it three times before we found out the short was killing the part.

So question, did you use a cig lighter relay to bypass the fuel pump? Because that replay only gets hot with the key, exactly what you need.

Have to ran codes?


.
 

Burla

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So you cannot get fuel pump to turn on? Did you bypass it to a relay that allows to much amperage through?
 

crash68

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The pump probably gave up the ghost, I would inspect the plug at the fuel pump also as those can go bad causing the pump failure.
 

ShldveKeptTheFord

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For sure a short in anything can foul a part like a fuel pump, in fact it is likely. So yes if the short is in TIPM it is very possible that a fuel pump will burn out and keep burning out until you fix the short. I had this happen once with a transfer case, had to replace it three times before we found out the short was killing the part.

So question, did you use a cig lighter relay to bypass the fuel pump? Because that replay only gets hot with the key, exactly what you need.

Have to ran codes?


.
yes I used the cig lighter with the position thats on with the key, and I tested it with the position thats always on. The only code I had was for an O2 sensor that I think is from an exhaust leak.
 

ShldveKeptTheFord

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The pump probably gave up the ghost, I would inspect the plug at the fuel pump also as those can go bad causing the pump failure.
I used my test light on it once I got it disconnected and it had power to it, so fuel pump it is I guess. It just seemed odd to me for the relay and the pump to both go bad within less than two weeks.
 

Jeepwalker

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You said Tradesman ....does your tk have a key? (switch). Those switches could be a common source of issues.

Have you wiggled the column shifter or put in N (in case it thinks it's in gear)?
 

Elvira

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Yes, not an uncommon occurance to have them both fail. Usually one will cause the other to fault.
 
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