Main Relay (Computer/Fuel System): Testing and Inspection

Fig. 22 Control relay connector.:

Fig. 23 Testing control relay coils L1 & L2. 1987-89 models:

Fig. 24 Testing control relay coils L3. 1987-89 models:

1987-89 Models

Note:Failure of the control relay prevents power supply to the fuel pump, injectors and ECU. Resulting in start failure.

1.Check continuity between control relay terminals, Fig. 22, with relay coil energized and not energized as shown, Fig. 23. To energize coils, L1 and L2, apply battery voltage across terminals 6 and 4.

2.Check continuity between control relay terminals, Fig. 22,with relay coil energized and not energized as shown, Fig. 24. To energize coil, L3, apply battery voltage across terminals 8 and 4.

3.If test results are not satisfactory, replace control relay.