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Finding fuel leak under FASS pressure

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I've have a fuel leak between fass and fuel module.   I'm trying to find exact location of leak. Leak is only about 3 drops per min and probably a connection, but I need to find.

Is it alright to turn key on and leave it on...way after WTS light goes out?  I want to keep fuel under pressure to find where drips are coming from. 

Thanks

Edited by 015point9
spelling and explain better

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15 minutes ago, Dieselfuture said:

Just jump fass relay harness so pump stays on 

OK thanks...Don't know why I keep calling it a FASS...really its an airdog and I didn't know if OK to keep elec on that long.   I'll bypass other stuff and I find my jumper wire.  I'll hook up from battery (with 20 amp fuse) to pump.  

Edited by 015point9

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Pull the relay and jumper between where terminal #30 and terminal #87 of the relay would go.  This way the fuse is already in the system and no need for a long jumper wire.  I generally use a large paper clip as my jumper.  

 

If you have a compressor you can use the compressed air to blow the wet area dry to help find the leak.

Uhhh why not just run the truck? If you got any JIC fittings could just be a tad bit loose and might just need a 1/4 turn to tighten down.

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Thanks folks...Got leak fixed.  Didn't trust my elec knowledge (couldn't find terminal 87)  I got line clean as possible, sprayed powder foot spray, started truck, wait for wet spot to show up.   I've got way to many connections in my fuel line, I have jic and push lock fittings.  I have it set up so I can unscrew a line and by pass airdog and run a carter pump.  Takes more fittings than I'd like. 

Edited by 015point9

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17 hours ago, 015point9 said:

I have it set up so I can unscrew a line and by pass airdog and run a carter pump.

 

I've got the same thing but no extra fittings really. Just the two male JIC fittings for the Carter. No it's not mounted on the block. It would hang in the AirDog location. Just swap power leads. 

 

But my AirDog 150 has been running non-stop for 12 years now. I've long given up on the secondary lift pump long ago.

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