Piper COMANCHE PA-24-180 Service Manual page 565

PIPER COMANCHE SERVICE MANUAL
terminal is connected to the regulator "POS" terminal The circuit trace will be burned open between points
F-F. Figure 9-26
IMPORTANT
For further assistance. follow the procedure in Delco-Remy Sen ice
Bulletin IR-273 when troubleshooting circuits containing this
regulator
9-60. Relan. (Delco-Remy)
9-61. Checking Relay. The relay is a protective device against high voltage that may appear in the electrical
system. The relay will open the circuit to the alternator field winding if the system voltage should e\er reach a
predetermined \alue. When the circuit opens. the alternator voltage will be eliminated. The relax is designed
so the battery will continue to hold the rela\ contacts open until the engine is stopped or the master s itch
is opened. The No. I terminal on the relay is connected to the master switch. and the No 2 terminal to the
regulator "POS" terminal. For connections. refer to the aircraft wiring diagram.
With the relay removed from the aircrafi. an electrical check can be made on a test bench to determine if
the relay is operating properli
CAUTION
RELAY
Do not remove the cover and attempt to
make adjustments on this rela\. If the
BATTERIES
FIGURE 9-27. RELAY TESTS
ISSUED: 8/18/72
3B19
ELECTRICAL SYSTEM
3B19