The cheapest and best tool in my box is a 12V test lamp, with long leads. I made it from a $5 inspection lamp. It is better than a voltmeter as it only lights up when you have real power which can propel something, whereas a voltmeter will show only potential difference.
You need to get under there and find the voltage. Hook one end to the battery negative and have a search.
If you do not have voltage at the pump, look back and find the fuel pump relay. My guess is that you have a relay which is not working.
BagusJeep lives in Bali.
1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE