Question about 1991 Chevrolet C1500

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Heater/AC controller failure

The digital heater/AC controller is non-functional, however I have plugged two used units in with the same results: no lighting appears on the controller, and it does not control the system. The Haynes manual says there is a 5VDC voltage in the plug that I can't find. I h ave 12VDC and ground to the controller.

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  • dhamos Mar 16, 2009

    I have fixed the problem, two weeks ago, after many trivial and inaccurate trys from your experts. I have asked for my money back inaccordance with your guarantee and expect to see it.



    The problem was the 12VDC supply, which I had indicated was at 8.5VDC. I had asked if any of you experts had a wiring diagram, which you apparently didn't. I found one in a Williams manual at my local library, confirmed that the pin should have had 12VDC battery on it, wouln up jumpering a new supply to it from unswitched 12VDC in the fuse panel, problem solved.

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If you dont have your 5v reference then no amount of modules is going to do you any good. Get a diagram trace your wire back and i'm betting you will find it fried to a crisp somewhere along the line, but make sure you check your fuses first. start simple and work into it. GOOD LUCK!!!

Posted on Mar 15, 2009

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Fuse Box Diagrams (Inside and Engine) for 2009 Volkswagen Tigua?


Attached are the diagrams requested - good luck!
Fascia 1
tiguanfascia1.jpg

Fuse, (Amps), Circuit
F1 -
F2 -
F3 -
F4 -
F5 -
F6 -
F7 -
F8 -
F9 (5A) Supplementary restraint system (SRS) control module
F10 (10A) Four wheel drive control module
F11 (5A) Parking aid control module, self-parking system control module
F12 (10A) Gas discharge headlamp control module (LH)
F13 (5A)
ABS/ESP system, AC system, anti-dazzle interior mirror, heated windscreen washer jets, seat occupation control
module, transmission control module (TCM), reversing lamps, engine management system
F14 (10A)
ABS control module, engine control module (ECM), heated seats, power steering control module, suspension
control module, trailer control module, AC control module, instrumentation control module, CAN data bus
gateway control module
F15 (10A)
Auxiliary heater, data link connector (DLC), parking brake control module, engine management, headlamp
direction control module
F16 (10A) Gas discharge headlamp control module (RH)
F17 (5A) Instrument panel
F18 (10A) Mobile telephone control module, multimedia control module
F19 (10A) Steering column function control module 2
F20 (5A) ABS control module, AC system, transmission control module (TCM)
F21 (15A) Door function control module, left rear, door function control module, right rear, multifunction control module 2
F22 (5A) Alarm system, multifunction control module 2
F23 (10A) ABS/ESP system, AC system, data link connector (DLC), rear view camera control module, headlamp switch
F24 (10A) Door function control module, driver, door function control module, passenger
F25 (20A) Transmission control module (TCM)
F26 -
F27 -
F28 (40A) AC control module, auxiliary heater
F29 (15A) Rear screen wiper motor
F30 -
F31 (20A) Auxiliary power sockets, cigarette lighter
F32 -
F33 -
F34 -
F35 -
F36 -
F37 -
F38 (10A) Steering column function control module 1
F39 (20A) Headlamp washers
F40 (15A) Trailer control module
F41 (15A) Trailer control module
F42 (20A) Trailer control module
F43 (25A) Sunroof control module
F44 (25A) Parking brake control module
F45 (25A) Heater blower motor, heated rear window
F46 (30A) Door function control module, driver, door function control module, passenger
F47 (30A) Door function control module, driver, door function control module, right rear
F48 (15A) Fuel pump (FP)
F49 (20A) multifunction control module 2
F50 (25A) Parking brake control module
F51 (40A) AC/heater blower motor control module
F52 (30A) Seat heater control module
F53
(20A/30A)
Headlamp washers
F54 (30A) Auxiliary power sockets
F55 (15A) Lumbar support adjustment
F56 (15A) Suspension control module
F57 (25A) Sun blind control module
F58 (1A) Trailer warning lamp
F59 (20A) Multimedia control module
F60 -

Fascia 3

fuses%2520fascia3.jpg


in engine bay

tiguan%2520125tsi%2520fuse%2520box%2520engine%2520%2520from%252005.2009.jpg

Fuse (Amps) Circuit
F1 -
F2 -
F3 (5A) Multifunction control module 2
F4 (30A) ABS/ESP system
F5 -
F6 (5A) Instrumentation control module, steering column function control module 2
F7 (40A) Ignition main circuits
F8 (25A) In-car entertainment (ICE)
F8 (25A) Voltage converter
F9 (5A) Mobile telephone control module
F10 (5A/10A) Engine control module (ECM)
F11 (20A) Auxiliary heater control module
F12 (5A) CAN data bus gateway control module
F13 (15A/30A) Engine control module (ECM)
F14 (5A) Engine management system
F15 (5A/10A/15A) Fuel pump (FP), AC compressor clutch, engine management system
F16 (30A) Multifunction control module 2
F17 (15A) Alarm system horn
F18 (30A) Audio system
F19 (30A) Windscreen wiper motor
F20 (10A) Engine management system
F21 (10A/20A) Engine management system, fuel pump (FP) control module
F22 (5A) Clutch pedal position (CPP) switch
F23 (10A) Engine management system
F24 (10A) Engine coolant blower motor control module, engine management system, engine coolant heater
F25 (40A) ABS/ESP system
F26 (30A) Multifunction control module 2
F27 -
F28 (50A) Glow plug control module
F29 (50A) Electric seats
F30 (50A) Ignition switch circuits
Location Component
1 Petrol: Engine control (EC) relay 1
1 Diesel: Ignition main circuits relay
2 Petrol: Engine control (EC) relay 2
2 Diesel: Engine control (EC) relay

Nov 26, 2014 | 2009 Volkswagen Tiguan

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