i recently installed a new fass truck has been runnung great i pulled in the yard alittle while ago . when i went back out she wont start i have interior lights and they dont dim when i turn the key but the radio goes out and cig light goes out i have a lighted car charger so i see the light, but nothing not even a crank like she is doornail dead. the fuel pressure starts to rise then slowly returns. and help would be appreciated

 

Check your BATT connections first. BUT might not hurt to get the BATT's load tested. So....sounds like the FASS is running???