i agree with slammed67 that the relays are very necessary and probably not the problem. running a switch direct off the battery for a current draw that high can cause undue stress on the switch (overheating/shorts). anyone use ball valves at the tank outlets in order to service a component without draining the system, or to isolate a severe leak in order to get to a place to fix it.
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-02 avalanche (daily driver)
-66 gto ragtop 389/400 (garage queen, hand-me-down from dad)
-72 Tribute Trans Am (6.0LS/T56 6-speed) in progress
-2003 YUKON (Wife's)
-71 gmc swb fleet (current project, gonna shave everything, bags, stuff w/ 20's, gen III powertrain)
-48 3100 SWB - 12/31/23 LONG TERM Project
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