Webasto BlueHeat Installation Instructions Manual - page 5
2004 Lexus RX330 3.3 Liter V-6
2
Electrical Harness - Overview
1
10
12
11
2
3
4
5
6
7
8
9
13
14
15
16
17
18
19
20
23
22
21
24
25
26
Fig. 7
Fig. 7
Fig. 7
Universal Electrical Harness - Description
Legend for Figure 7
1 - Fuse Holder and Fuses
2 - Resistor - HVAC blower speed control
3 - Relay K1 - HVAC control
4 - Relay K2 - HVAC control
5 - 18 GA Green - ‘ON’ signal from relay K1 and K2 to
relay K3, Pin 86 (Use when relay K3 is mounted with
relay K1 and K2)
6 - 18 GA Blue - to Ignition ‘ON’ signal source
7 - Main Heater Harness - BlueHeat Coolant Heater
8 - Blower Control Harness - Positive side
9 - 10 GA Red - Connects to HVAC control switch
circuit, positive side, to blower motor
10 - 10 GA Black - Connects to HVAC blower motor
positive side
11 - 18 GA Green - ‘ON’ signal from relay K1 and K2 to
relay K3, pin 86 (Use when relay K3 is mounted near
HVAC blower motor - same function as item 5
12 - Blower Control Harness - Negative side (Harness is
wire tied to main harness. Cut wire tie and separate
from main harness before installing)
13 - 10 GA Blue - Connects to HVAC control switch cir
cuit, negative side, to blower motor
14 - 10 GA White - Connects to HVAC blower motor
negative side
15 - 10 GA Brown - Connects to vehicle ground point
when relay K3 is mounted near HVAC blower motor
16 - 18 GA Green - Relay K3, pin 86 (Connects to ‘ON’
signal 18 GA green from relay K1 and K2). See item
5 and 11.
17 - Relay K3 - HVAC control (Typically mounted near
HVAC blower motor)
18 - 18 GA Blue & Brown - Fuel Metering Pump Harness
19 - 20 GA Black, Red & Brown - Timer Harness
20 - 18 GA Violet - “Vent Mode” for optional remote
control
21 - Main Power Harness
22 - 10 GA Red - Battery Positive
23 - 10 GA Brown - Battery Negative or Ground Point
24 - 18 GA Yellow - Diagnostic Connection
25 - 18 GA Orange - Supplemental heating option - Not
applicable to BlueHeat
26 - 10 GA Brown - Optional ground connection for
relay K3 when K3 is mounted with relay K1 and K2
(Same function as item 15)