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Possibly shorted out the transfer pump. I have heard of this issue over the years, from memory, some just installed an aftermarket pump and wired it in. How long did you disconnect the battery for? Just reading on the interwebs someone had to leave it disconnected for an hour for it to work.
The sub tank sender units do have a level switch so when the tank is empty it will shut off the transfer pump? Might be a dodgy sender unit?
Last edited by mudski; 27th November 2021 at 06:48 PM.
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