JK won't start unless you shake fuse box?!

[mitchxj]

08 diesel 4dr JK
I was fiddling with some stuff in the engine bay, I was leaning on my fuse box to get to something.
The jeep WAS running great.
Now it will turn over and over and over without starting, but if you get someone to shake the fuse box it'll start straight away!
I didn't put much weight on the box and I heard nothing snap or crack.

Any ideas on where I could begin my search?
I thought it would be alot more sturdy
You can hear the fuel pump working so I don't think it's that

[OzRick25]

run relay or connections? glow plug fuse connections? I don't have a diesel but I think the early models used similar to the petrol and you can find the diagrams of them on a number of forums if you struggle with the underside numbering. The fuse box to TIPM setup can be sensitive to water and dust and diy'ing and so can the TIPM cables.

[mitchxj]

I went through and inspected every cable for a tear.. nothing.
So spray the fuse box with CRC and cleaned up all the engine bay earths now it works? seems odd

[Paul from pambula]

Tipm


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[humdingerslammer]

Loose earth cable, then. Somewhere.