424 Section 4 Computer Control Technology Copyright Goodheart-Willcox Co., Inc. • Check that the actuator is fully seated before tight- ening the mounting screws. • Double check actuator operation after replacement. Computer Service Computer service involves replacing or repro- gramming the computer. The computer is the last component to be suspected of being the problem A C B D Relay Locking pin Goodheart-Willcox Publisher Figure 25-10. Relays have moving parts that can fail in service. Relays can be located almost anywhere on the vehicle. A—Techni- cian has removed the rear seat cushion to gain access to the fuses and relays. B—This relay has a locking pin that must be removed before disconnecting the harness. C—Relays can have different internal construction. Make sure the replacement unit is identical to the original. D—The service manual will give relay locations for pinpoint testing and replacement.