Where is the fuel pump relay on a 1994 Cadillac Seville?

The fuel pump relay location on a 1994 Cadillac Seville is under the hood, in the underhood fuse block (junction box). However, there isn't a single, universally labeled "fuel pump relay." It's often integrated into the system and may be part of a larger relay assembly or not clearly labeled as such.

To find it, you'll need to:

1. Consult your owner's manual: This is the best resource. It will have a diagram of the fuse and relay box showing the location of the fuel pump relay (or the circuit it's a part of).

2. Use a wiring diagram: A wiring diagram for your specific year and model Seville will show the fuel pump relay's location and circuit path. You can often find these online through automotive repair websites or forums dedicated to Cadillacs.

3. Look for a relay that is likely involved with fuel: While not guaranteed, relays near those for the engine control module (ECM) or other fuel-related components are more likely candidates. You may need to test relays with a multimeter to be sure.

Important Note: Before working on any electrical components, disconnect the negative terminal of your battery to prevent accidental shorts and damage.

Without the owner's manual or a wiring diagram, pinpointing the exact relay is difficult. Using trial and error by swapping relays (with similar amperage ratings) is risky and could damage other systems. Consulting the service manual is the safest and most reliable method.