TM 5-3805-248-23-1
ELECTRICAL ACCESSORIES TROUBLESHOOTING PROCEDURES - CONTINUED
0011 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
d. Connect multimeter positive lead to
1. If continuity is not indicated, repair
12. Heater Blower Is
orange and blue wire of heater
open circuit between blower and switch
Inoperative - Continued.
blower (harness side) and
multimeter negative lead to orange
2. If continuity is indicated, go to Test 4.
and blue lead of heater switch
(harness side).
4.
Check switch low speed contacts for
continuity.
a. Place battery disconnect switch in
OFF position (TM 5-3805-248-10).
b. Set multimeter to appropriate ohm
(Ω) range (WP 0018 00).
c. Place heater switch in low position.
d. Connect multimeter positive lead to
1. If continuity is not indicated, replace
heater switch red wire (switch side)
heater switch. (WP 0222 00).
and multimeter negative lead to
2. If continuity is indicated, replace heater
heater switch blue wire (switch
blower (WP 0319 00).
side).
5.
Check for continuity to heater blower
medium speed terminal.
a. Place battery disconnect switch in
OFF position (TM 5-3805-248-10).
b. Disconnect heater blower and
switch electrical connections (WP
0319 00).
c. Set multimeter to appropriate ohm
(Ω) range (WP 0018 00).
d. Connect multimeter positive lead to
1. If continuity is not indicated, repair
orange/green wire of heater blower
open circuit between blower and switch
(harness side) and meter negative
lead to orange/green wire of heater
2. If continuity is indicated, go to Test 6.
switch (harness side).
0011 00-35
