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JB4/Fuel It Connection Issues

Mtowns5

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Oct 27, 2023
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Currently I’m having issues connecting to the JB4 since install my CPI/Fuel It Kit. I was told since my Fuel It kit is on constant power and not on switched power it will cause connection issues for the JB4. Only solution currently to get both to run at the same time is to disconnect the battery. I went ahead and linked below what I’m working with currently. Thanks!
 

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I had the same issue as you did at first when I had it on constant power. I now run them both off the same switched power location and haven't had any issues since.
 
I had the same issue as you did at first when I had it on constant power. I now run them both off the same switched power location and haven't had any issues since.
Any suggestions on which 10A is switched power?
 
Any suggestions on which 10A is switched power?
Me and another user have went down this route and searched a bunch. Look up the CPI kit installation and they show which 10a they use.
 
I used a volt meter to find the right one. You should be able to look at the cpi or meth installation instructions from either bms or lap3 and find the correct location for the fuse tap.
 
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