Where is the fuel pump relay switch located - 1993 GMC Safari

Your vehicle does not have relay switch ! Fuel pump controlled by a fuel pump driver control module . ( computer ) Who ever told you that it needed a fuel is probably wrong !

Malfunction indicator lamp lit ??????? What code ?

This should be in the owner's manual. I found the below on autozone.com, their repair help location:
An inertia switch is used as a safety device in the fuel system. The inertia switch is located in the cab, generally under the dashboard on the right side. It is designed to open the fuel pump power circuit in the event of a collision. The switch is reset by pushing each of 2 buttons on the switch simultaneously (some models use switches with only one reset button). The inertia switch should not be reset until the fuel system has been inspected for damage or leaks.
When the ignition switch is ON , it turns the EEC power relay ON . The EEC power relay provides power to the powertrain control module (PCM) and the control side of the fuel pump relay. Power for the fuel pump(s) is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse, current flows through the fuel pump relay and inertia switch to the fuel pump(s). The fuel pump relay is controlled by the PCM.
When the ignition switch is turned ON , the fuel pump(s) will operate. If the ignition switch is not turned to the START position the PCM will shut the fuel pump(s) OFF after 1 second. The PCM will operate the fuel pump(s) operate the fuel pump(s) when the ignition switch is turn to START position to provide fuel while cranking.
After the engine starts, the PCM will continue to operate the fuel pump(s) unless the engine stops, drops below 120 rpm or the inertia switch is tripped.

No driver module shown on the wiring diagram for 89-98 models.
There is an EEC relay that powers the fuel pump relay. The fuel pump relay is grounded by the PCM. The voltage goes from the fuel pump relay thru the inertia switch and on to the pump.

It is located in the relay and Maxi fuse box under the hood near the battery, both the fuel pump fuse and relay are in this box, the fuel pump fuse is a 20Amp and is marked #10, the fuel pump relay is is marked as relay #301.

There is also a fuel pump cutoff switch (triggered by an accident exceeding 3 G's)

The fuel pump shut-off switch is

located in the passenger's foot well,
by the kick panel.

No noise from fuel pump when you turn over the car .First thing get voltage at fuel pump relay checked, is there 12 volt to the relay.If no, then problem is again the relay.--------- To reconfirm the problem, try other test, that is remove the relay and by pass the relay terminals with a jumper wire .Then with 12 volt external battery give power to fuel pump connector and see, if the fuel pump starts, then its clear that fuel pump relay is faulty.----------- Also other problem can be fuel pump inertia switch.If the inertia switch is faulty then also fuel pump will not start.-------- The fuel pump relay on a 1995 Ford Explorer is in the power distribution
box, in the engine compartment, driver's side near the firewall.----------
The fuel pump inertia switch is in the right front passenger area
it is below the dash but above the carpet in the right hand corner.--------
Its a push button type inertia switch.
--------
Fuel Pump Activation
When ignition switch is turned to START position, PCM operates fuel pump relay to provide fuel for starting engine. PCM senses engine speed and shuts off fuel pump by opening ground circuit to fuel pump relay when engine stops or engine speed drops to less than 120 RPM. When ignition switch is in ON position, EEC power relay is energized (contacts closed). Power is provided to fuel pump relay and timer in PCM. Fuel pump receives power through fuel pump relay contacts.
Inertia Fuel Shutoff (IFS) Switch
All models use an electrical interrupt switch in fuel system. During a collision or vehicle rollover, electrical contacts within inertia switch open, shutting off fuel supply to electric fuel pump. Fuel supply is interrupted even when engine is running.
A reset button is located on switch assembly. If electrical circuit trips, vehicle will not restart until switch is reset. Fuel system should be inspected before resetting switch.
IFS switch is located under instrument panel, near right side of transmission hump. ----------- If the fuel pump relay, the inertia switch and fuel pump all checked ok, and fuel pump is working with direct 12 volt source to fuel pump.Then problem relates to computer.The computer (power control module, PCM) is faulty and has to be replaced.--------- This will help.Thanks.Helpmech.

Hello abzalkhan193
Heres a few things to check that could cut power to the fuel pump. The fuel pump inertia shutoff sw
in the trunk on the left side, there is a reset button on the switch if you push the button down and
you hear/feel a click then the switch was tripped and you just reset it. The switch's job is to cut off
the fuel in case of an accident. Next, the fuel pump fuse located in the battery fuse block under the
hood on the right fender well, fuse #1 20amp fuse. Next, the fuel pump relay, the relay is located in
relay center on the left fender well. Hope this is helpful.

The fuse is actually a Relay Switch and its located in the Fuse Relay Center on the driverside of the engine compartment. The Black Box is labled Fuse Relay Center, the diagram on the cap displays which Relay is the Fuel Pump relay...the Relay switch is usually $8-$15 depending on where you shop

Underneath your hood, behind the passenger side headlight, behind the core support, is a bank of 2-8 relays. One of those relays is the relay needed for your fuel pump. There will also be a fuel pump relay fuse located there. The relay designation should be on the cover of the relay compartment.

Hi irvj6ohn:
The 1993 and 1994 XJ6 Fuel Pump Relay is located in the trunk of the vehicle on the right hand rear side. It is light blue and black in color.
I hope this helps.

Regards
bobbyapal94

no it doesn't. the fuel pum has a relay that is located in the junction box under the hood if your vehicle is not starting because your not getting fuel check the relay. I use the a/c clutch relay to switch with the fuel pump relay if the vehicle starts just replace the relay if the vehicle doesn't start then you have a bad fuel pump...please rate