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Re: fuse keep blowing
I would look for a short circuit in the wiring loom due to chafed wiring on its way to the pump. You could remove the connection at the pump just to be sure its not an internal short, if the fuse does not blow and its got 12v on the terminals when disconnected (maybe substitute a car bulb for the pump if you don't have a meter) with the engine turning over chances are the pumps gone short circuit.
How did the fault begin? had the car been standing or was it during use or had anything else been done to the car to cause it? If it had been standing for some time and failed to start then I would suspect the pump (maybe siezed??). If after I had been fiddling elsewhere then what have I done, trapped wire maybe or put a self tapper through it (or in my case-drilled through a wiring harness of an ambulance whilst fitting a radio-oop's)
If the pump seems OK (I.E. the fuses still blow!) the next thing I would do is disconnect the relay and check the resistance between the feed to the pump and ground with the pump disconnected. I'm not sure if the injection system fitted to the late Spiders had a low pressure pump in the tank but if so that needs to be eliminated as well.
Good luck!
Mark
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