What fuse powers the lighting switch circuit in this HVAC diagram?

Fuse position 13 in the fuse box, rated 15A, feeds the lighting switch via a white (W) wire.

What connector and pins does the A/C amplifier use?

The A/C amplifier uses connector B14 with pins 1, 12, 4, and 10 shown: pin 1 (Y/B) to the engine control module, pin 12 (Y/Bl) to the coolant temperature switch, and pins 4 (W/Bl) and 10 (Y/G) to the thermistor.

How is the thermistor wired in this circuit?

The thermistor connects at connector B15: pin 1 via a white/blue (W/Bl) wire and pin 2 via a yellow/green (Y/G) wire to A/C amplifier pins 4 and 10.

What do the [1] and [2] symbols in the diagram mean?

Per the legend, [1] indicates 2-door CAMI and [2] indicates 2-door IWATA and 4-door body styles; e.g., connector E38 pin 3 applies to [1] and G05 pin 13 to [2].

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Suzuki Samurai A/C Amplifier & Heater Illumination Wiring Diagram (HVAC)

Wiring diagram: lighting switch, panel illumination light, A/C amplifier, thermistor and coolant temperature switch

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Wiring diagram showing heater control panel illumination, A/C amplifier thermistor and coolant temperature switch circuits.

AI caption August 2006 · Photo 40 of 86

This document is one page of a scanned wiring diagram (filed as HVAC3.gif) covering an air conditioning / heater control circuit, uploaded to a 1986 Suzuki Samurai gallery. It shows power originating at fuse position 13 (15A) in the fuse box, feeding through a white (W) wire to the lighting switch (connector E40, pins 10 and 8, with OFF/TAIL/HEAD positions). A red/yellow (R/Y) wire continues through connector E38 (pin 3) or G05 (pin 13) — depending on body style per the legend (2-door CAMI vs. 2-door IWATA/4-door) — to the heater control panel illumination light (connector G21), which outputs a red/green (R/G) wire to the illumination controller. The diagram also details the A/C amplifier (connector B14, pins 1, 12, 4, 10): pin 1 carries yellow/black (Y/B) through B13/E46 to the engine control module; pin 12 carries yellow/blue (Y/Bl) through E13/B08 to the coolant (water) temperature switch (connector B08), which grounds when ON; pins 4 and 10 connect via white/blue (W/Bl) and yellow/green (Y/G) wires to a thermistor at connector B15. Wire colors, connector IDs, and pin numbers are all labeled, making this useful for diagnosing A/C amplifier, illumination, and coolant temperature switch circuits.

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Frequently asked questions

What fuse powers the lighting switch circuit in this HVAC diagram?: Fuse position 13 in the fuse box, rated 15A, feeds the lighting switch via a white (W) wire.
What connector and pins does the A/C amplifier use?: The A/C amplifier uses connector B14 with pins 1, 12, 4, and 10 shown: pin 1 (Y/B) to the engine control module, pin 12 (Y/Bl) to the coolant temperature switch, and pins 4 (W/Bl) and 10 (Y/G) to the thermistor.
How is the thermistor wired in this circuit?: The thermistor connects at connector B15: pin 1 via a white/blue (W/Bl) wire and pin 2 via a yellow/green (Y/G) wire to A/C amplifier pins 4 and 10.
What wire color feeds the heater control panel illumination light?: A red/yellow (R/Y) wire from the lighting switch feeds the heater control panel illumination light (connector G21), and a red/green (R/G) wire exits to the illumination controller.
What do the [1] and [2] symbols in the diagram mean?: Per the legend, [1] indicates 2-door CAMI and [2] indicates 2-door IWATA and 4-door body styles; e.g., connector E38 pin 3 applies to [1] and G05 pin 13 to [2].