Volt-Ohmmeter Test; Jumper Connection - Piper Navajo PA-31 Service Manual

C453 C453
OHMMETER
TYPICAL
BATTERY
HARNESS
CONNECTOR
NEG. POS.
JUMPER
LEAD
2
VOLTMETER
Figure 11-12. Volt-Ohmmeter Test Figure 11-13. Jumper Connection
11-21. REGULATOR(DELCO-REMY)
11-22. CHECKING REGULATOR CIRCUIT. Regulator failures
may be caused
by circuit misconnections, such as reversed leads or shorting or grounding of
terminals with a screwdriver, etc. The following provides a means of locating
circuit misconnections. It also covers the different types of regulator panel
board circuit trace defects which indicate a certain
type of wiring harness mis-
connections. A burned circuit
trace on the regulator panel board is proof that a
circuit misconnection exists, or occurred at some time. However, a miscon-
nection will not always cause a burned circuit trace even though circuit compo-
nent failures have been caused.
Before installing a new regulator, it is very important tomake sure that no
wiring circuit defects or wiring harness
misconnections exist. If the wiring
harness
is defective, or if misconnections exist, the new regulator will fail too.
Furthermore, repeated replacement of regulators will only result in repeated
regulator failures,
and this will continue until the circuit defect is corrected.
To check the wiring harness
for defects or misconnections before install-
ing the new regulator,
observe the following procedure:
NOTE
Meter connections are made to the harness connector
that has been unplugged from the regulator.
Reissued: 10/12/79 ELECTRICAL SYSTEM
Effectivity
DELCO
PIPER NAVAJO SERVICE MANUAL
4B10