LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1986 >> Thunderbird Base, 5.0 F >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Fuel Injection System - High Pressure CFI >> Testing >> Fuel Delivery System Test >> Fuel Pump Relay Modification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Pump Relay Modification

  1. New fuel pump relay must be modified to serve as aid in testing fuel delivery system. Following Ford relays may be used: Part Numbers E3EB-9345-BA, -CA, -DA or E3TF-9345-AA.
  2. Relay case skirt must be modified. Drill 1/8" (3.2 mm) hole through side of skirt in line with row of 3 terminals and as close as possible to base of relay. See Fig 1 . Cut away skirt at ends in order to gain greater access to terminals. Make up 16 or 18 gauge jumper wire to connect terminal numbers 2 and 4 on relay.
  3. Solder wire ends to terminals as close to base of relay as possible so modified relay will fit into socket of board. Run 8-10' (2.4-3.0 m) of flexible wire to terminal No. 1 through hole drilled in relay skirt. Solder bare end of wire to terminal No. 1 and install alligator clip on opposite end for use as ground clip.
Fig 1: Fuel Pump Relay Modification Use this relay to energize fuel pump for fuel system pressure test.
G5326