Where is the fuel pump relay on 1991 Lincoln town car?

The fuel pump relay location on a 1991 Lincoln Town Car isn't standardized and depends on the specific options and whether it's a carburetor or fuel-injected model (though 1991 Town Cars were almost certainly fuel-injected). There's no single definitive answer.

To find it, you'll need to do the following:

1. Consult your owner's manual: This is the best starting point. The manual should have a fuse and relay diagram showing the location of the fuel pump relay.

2. Check the underhood fuse box: This is the most common location for relays. The fuse box usually has a cover with a diagram showing which fuses and relays are where. Look for a relay labeled "fuel pump," "EFI," or something similar. The diagram might use a symbol representing a relay.

3. Check the interior fuse panel: Some relays, though less common for the fuel pump, are located inside the car, usually under the dashboard. Again, consult the owner's manual.

4. Use a wiring diagram: If you can't find it in the fuse boxes using the manual's diagram, you'll need a wiring diagram specific to your 1991 Lincoln Town Car. These can sometimes be found online (be cautious of the source) or from a repair manual. The diagram will show the fuel pump relay's location and the wires connected to it.

Important Note: Before working with any electrical components, disconnect the negative battery cable to prevent accidental short circuits.