Club Car Carryall 295 Maintenance And Service Manual page 160

11
Test Procedures
TEST PROCEDURE 9 – Wire Harness Diodes
See General Warnings, Section 1, Page 1-2.
A diode is designed to conduct current in one direction only. Depending on the application, diodes are used in the
vehicle to control electrical system logic, or to help protect relay and switch contacts from excessive arcing. See
following NOTE.
NOTE: If a diode conducts current in both directions, the diode has failed closed. If a diode will not conduct current in
either direction, the diode has failed open (Figure 11-14, Page 11-18).
WAVETEK 5XL
V V
OFF
1000 500
200 200
20 200
2m
4 2
200
20
m
m
200
2000
m
k
200k
20k 200
A
2k
1
V ! COM ! 200nA
MAX
1000 ---
750V FUSED
WAVETEK 5XL
V OFF V
1000 500
200 200
20
200
5
2 2m
200
m 20
m
200
2000
k m
200k
20k 200
2k A
2
!
V ! COM 200nA
MAX
1000 ---
FUSED
750V
WAVETEK 5XL
V OFF V
1000
500
200
200
20 200
6
2 2m
200
m 20
m
200
2000
k m
200k
20k 200
2k A
! !
V COM 200nA
MAX
1000 ---
FUSED
750V
1. VOM Black Lead 2. VOM Red Lead 3. Wiring Diagram Symbol
with Diode Stripe Orientation 4. Good Diode (Probe Scenario A) -
Conducts Current and Shows Continuity 5. Good Diode (Probe
Scenario B) - No Continuity 6. Bad Diode - Meter Beeps In Either
Direction (Probe Scenarios A and B)
1127
Figure 11-14 Basic Diode Information
The wire harness is equipped with several in-line diodes. The following table describes each diode's function in the
electrical system, the location in the wire harness, and the symptom(s) of a diode failure.
Page 11-18 2013 Carryall 295/XRT 1550 Maintenance and Service Manual
A
2
3
( )
B
1
1 2
1
2
TROUBLESHOOTING AND ELECTRICAL
SYSTEM: GASOLINE VEHICLES