Isuzu 2000 Trooper Workshop Manual page 42

Fan switch Resistor terminals
position with continuity
1
2
3
4
Fan Control Knob (Fan Switch)
1. Check for continuity between the terminals of the fan
switch.
Fan switch Switch connector terminals with con-
position
OFF
1
2
3
4
Heater & A/C Relay
1. Disconnect the heater and the A/C relay (B-36).
D When removing the connector for relay, unfasten
the tang lock of the connector by using a
screwdriver, then pull the relay (1) out.
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–13
Resistance
2.4 m
1 — 2
0.90 m
2 — 4
0.28 m
2 — 6
2 — 3 —
865RS001
tinuity
No continuity
1 – 2 – 4
1 – 4 – 5
1 – 3 – 4
1 – 4 – 6
2. Check for continuity between the heater and the A/C
relay (B-36) terminals.
Condition
Normal
When battery voltage is
applied between 1 – 3
825RS001
825RS002
Relay terminals with
continuity
1 – 3 (Approx 85–105m)
2 – 4