MY 1991 740 Volvo Regina 4dr non turbo, has had the fuel pump and relay changed and the fuse #11 power wire is dead. Is there a fusible link and if so, can you tell me where it is located? Fuse #1 works fine.

I suspect the fuel pump circuit is drawing to much power. Do you have something else hooked into those wires(Audio equip?) The fuse is there to protect the relay. Have you put a bigger fuse (bigger number) in there to keep it from blowing the fuse? If not I suspect a bad fuel pump or a stuck fuel pressure regulator(Causing the pump to work too hard- drawing more electrical power) Just remember, its hard to put the smoke back in once it catches fire.

Find the fuel pump relay and see if it still has a power feed. I hope you didn't hurt the computer with battery on backwards, but that is a possibility.
Pull the fuel pump relay, and check all the terminals it plugs into with a test light or voltmeter. One terminal should have power. It should be hot at all times. If nothing trace the power supply from battery to that relay. A fuse or fusible link may have gone out. If it does have power, check at the fuel tank for power on the pump wire when the engine is cranking. If power there, likely the pump is gone. If no power signal when cranking the engine, it's back to the relay to check the fuel pump circuit. You will have to see a wiring diagram.

You probably have a blown fusible link (between the starter cable post and the fuel pump relay), or a blown relay fuse or a bad relay. The fusible link and relay should have power always and can be checked with a 12 volt test light.

The fuel pump relay is twice fused. The relay power is provided through a fusible link connected at the starter post that the positive battery cable connects to; and there is an in-line fuse inside a cube shaped plastic box near the relay. Either the fusible link or the inline fuse is blown, or there is a break in the wire that runs from the stater post to the relay.

The fuel pump relay is powered by a fusible link connected to the starter solenoid on the positive battery terminal. That fusible link feeds the 10 amp fuse near the relay. You can test the fusible links with a 12 volt test lamp. If the fusible link test okay check for an open circuit in the wire between the link and the 10 amp fuse. Hope this gets you fixed.

Bronco V8 ?????Check for voltage at the Inertia Switch, it it has power, then the fuel pump may be bad. If no power then check the fuel pump relay and fuse. The yellow wire should have power when trying to start i tis powered from the relay which gets power from a fusible link at the starter solenoid (yellow wire, fusible link)

The pump should have a fuse in the fuse block. You need to check for power in the fuse block and you need to check power to the pump relay.

Sometimes there is a fusible link to the Relay. If you check the connector terminals for power where the Relay plugs in, you can determine if the fusible link has blown. You could have already replaced the bad parts and now need to restore power to the Relay.

1) The fuel pump could be dead.
2) The fuel pump relay (LH models it is located on the driver's side), Regina systems it is located on the coolant expansion tank. Test as follows: turn key to ON and listen for a whirring sound. NG, check the fuse, then check the relay by substitution.
3) Inside the car, the fuel injection relay could also be suspect, but unlikely. Again, check by substitution.

Remember that the fuel pump relay can sometimes fail because of the solder joints making it intermittent. Do not attempt to short across it without the pinouts for the relay - it could destroy the computer outputs along with the computer itself.

You should see a brief stream of gas doing the key test - along with a click of the relay as well with the fuel pump filter disconnected. If all tests good, remove the cover (sedan models) and check the connections in the trunk. On wagon models it is accessed by way of the foldout in the trunk area, then remove the inspection cover, if needed.

Check under the hood for a box containing your fusible links (they look like large blade fuses in most modern vehicles). The fuel pump relay only operates the fuel pump. It doesn't provide power to the rest of the fuel system. Odds are the fuse for the injection system is blown. The inside of the cover of most fusible link cases usually has a diagram which tells what each fuse is. The easiest thing to do is locate that fuse and remove it (with the vehicle off of course) and visually inspect to see if it's blown. If it is, simply replace it and see if that corrects your problem. While you're under the hood you might want to trace the wires back to their origin and check to be sure the harness is not rubbing or chafing against anything that might have caused wires to break and short. It's rare for those fusible links to blow without a reason.

check fusible link #4. it is the pink, 30amp one, at the top left corner of the underhood fuse/relay box.

i doubt its the fusible link, if it was it would cause alot more than your fuel pump to no work.

it is most likely a relay so check the fuel pump relay and the ASD relay.

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