The fuel relay and inertia switch could be two different items. The inertia switch kills power to the pump. If there is a relay in between the inertia switch and the pump, then it would mean the inertia switch was tripped by slamming a door or an impact. Check your owners manual for the inertia switch. This website advertises online service manual reference.
If there is no feed at terminal 30 at the relay. Remove the fuse box and check for any corrosion around the wiring. If all ok you may have a faulty fuse box. Being a 91 Golf it should have a MK3 fuse box.
Check the ground circuts from the battery to cab or fender these are known brake or rust
SOURCE: NO POWER TO FUEL PUMP, RELAY WORKS FUSE GOOD
If you have put direct power to the fuel pump and it still wont work, then get an electrical test unit, test light, and ohmmeter, and check to see if there is a break in any of the wires, and that you have got a good ground connection from the ground feed.
After confirming you have good connections, then it will be obvious that the fuel pump needs replacing.
SOURCE: 1996 CADILLAC DEVILLE, NO POWER TO FUEL PUMP
Check for a burned fusible link under the hood. If you have power at the fuel pump relay, you could have a bad ignition switch or bad oil pressure switch...accordianman
SOURCE: fuel pump relay or fuse
In most cars it is located at the fuse box or relay fusebox inside the engine compartment or near the fuel pump itself. It could aslo be the fuel pressure regulator if the fuel pump is good.
SOURCE: no power at fuel pump chev.S-10 looking for fuel pump relay and fuse
The fuel pump relay is located Under hood, driver side, upper firewall, mounted in
relay block.
The fuse is located under the instrument panel to the left of the steering column.
The fuse block should be visible from underneath the steering column,
near the pedal bracket. If the panel is not visible, check for a
removable compartment door or trim panel which may be used on later
models to hide the block.
SOURCE: no power to fuel pump
THE FUEL CUT OFF RELAY IS IN THE FUSE BOX.YOUR FUSE BOX IS LOCATED BELOW THE GLOVE COMPARTMENT ON THE RIGHT BULK HEAD.NOW JUST IN CASE YOUR CAR WAS MADE BETWEEN 83 -84 YOUR FUSE BOX LOCATION UNDER A FLIP DOWN DOOR UNDER THE DASH BOARD ON THE LEFT SIDE OF INSTRUMENT PANEL.HOPE THIS CAN BE SOME HELP.
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where is the inertia switch located on the car
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