What is an electronic relay? - 2008 Volkswagen Passat Sedan

These are located in the power distribution box in the engine compartment near the brake master cylinder. Fuse #17 is for Electronic Shift On The Fly Relay,Transfer Case Shift Motor and relays #40 and #41 are Electronic Shift On The Fly Relay #1 and #2.

In the under hood fuse box . Do you know about ford electronic returnless fuel system ? It's computer controlled , has a fuel pump dirver module which controls the fuel pump with a duty cycle . Watch this video
Ford Electronic Returnless Fuel System Diagnosis Part 1 Ford

Ford Electronic Returnless Fuel System Diagnosis Part 2

you can find relay location at
http://www.bbbind.com/free_tsb.html Look at electrical distribution , fuse panel .

2007 Chevy her ? HHR ? 2.2L 4cylinder , check the run/crank relay ! Relay # 51 in the under hood fuse/relay box.
Power to many of this vehicle?€™s circuits are controlled by the module that is designated the power mode master (PMM). This vehicle?€™s PMM is the body control module (BCM). The PMM controls which power mode (Run, Accessory, Crank, Retained Accessory Power, or Off) is active.
Run/Crank Relay The run/crank relay control circuit is connected to a constant ground and is switched by the ignition 1 circuit or the body control module (BCM). The BCM, will in lieu of the ignition switch position, activate the Run/Crank relay during a remote start event. The Run/Crank relay supplies a power signal to the following circuits, when the a Run or Crank power mode is selected:
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Automatic transmission shift indicator

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Automatic transmission (A/T)

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Switched power feeds to the BCM

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Electronic brake control module (EBCM)

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Electronic ignition module (spark control)

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Electronic power steering module (EPS)

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Fuel injectors

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Powertrain control module (PCM)

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Park neutral position (PNP) switch

The blower motor relay in the auxiliary junction box under the hood is good ? All relays ? only one controls the blower motor ! The electronic automatic temperature control module turns it on by supplying a ground inside the module ! The 30 amp fuse for the blower motor is located in the under hood auxiliary junction box ! At the relay socket test for battery voltage at pins 30 an 86 ,power form 30amp fuse ! The other two pins 85 an 87 ,85 is circuit to the electronic temperature control module . You could test this part of the circuit too , with a test light or volt meter . But if no voltage to the blower motor ,could be the electronic temperature control module is bad ! VEHICLE RELAYS Operation Diagnosis

Have you checked your fuses and relays? Cadillac's have an electronic shift system. It is actually both mechanical and electronic. Check your fuses and relays, if you don't have a book for the location of the fuses and relays you can probably find a printout on the internet. It could be mechanical but I would eliminate all the electronic devices before I went for the mechanical shifter. More than likely you have a blown fuse or relay. There is no telling where the fuse will be.It might be under the spare tire.LOL! There are fuse boxes and relays all over the Cadallics. I believe the engineers deliberately hide them, that's where the fuse location guide will help and of course if you are fortunate to have the owners manual it might show all of them but not necessary. Good Luck!
Col. Dana Gillespie

Check the door unlock relay located in the AUX relay box #2 .
Auxiliary Relay Box #2, 2 Door w/Electronics Group
Left rear of vehicle, above wheelwell Auxiliary Relay Box #2, 2 Door w/o Electronics Group
Left rear of vehicle, above wheelwell Auxiliary Relay Box #2, 4 Door w/Electronics Group
Left rear of vehicle, above wheelwell You need to take rear trim panel off to view this relay box. There is a seperate relay for lock

For the EMTC ( Electronic Manual Temp Control ) and EATC ( electronic Automatic Temp control ) systems the AC fuses are :
F32 feeding the coil on the AC clutch relay
F11 feeding the normally open contacts on the AC clutch relay ( which powers the AC solenoid

The blower motor ( for AC or heat ) is F116 which feeds the blower motor relay

1. Open the Fuse box and find out the relay called "ST".

Fuse Box

The Fuse Reference
2. Then you will see the relay label with 1, 2, 3 and 6.

The Start Relay Label With 1236
3. Unplug the relay and then turn the car key to on, ready a wire which both end plastic cover has been cut.

4. Connect both end of the wire to the relay slot 3 and 6. Once the car started then disconnects the wire from the relay.
Unplug The ST Relay And Connect By Using A Wire

One relay carrier is placed inside car - the fuse box & relay plate - fascia 2.



The electronic box - Engine Control Module (ECM) is placed under hood in the left corner of engine bay near windscreen. There are also some main relays.

your owner manual sould have fuse chart. Some fuses/ekays in enine compartment. Some in car on left side of instrument panel

in car


Fuse Amps Circuits Protected 1 10 Power Mirrors, Anti-Theft Warning Light, Diagnostic Connector 2 5 Generic Electronic Module, Start Interrupt Relay Coil 3 5 Radio Illumination, Remote Radio Illumination, Electronic Instrument Cluster, Electronic Instrument Cluster PRNDL Illumination, Electronic Instrument Cluster Switch Module, Analog Cluster Illumination, Instrument Illumination 4 — Not Used 5 — Not Used 6 15 Rear Quarter Windows (LH and RH) 7 15 High Mounted Stoplamp, Brake Shift Interlock 8 25 Subwoofer, JBL Amplifier 9 10 Park and Turn Lamps, Side Marker Lamps, License Lamps, Stop Lamps 10 2 High Beam Indicator Electronic Cluster 11 15 Park Lamps 12 10 Remote Radio, Auxiliary Warning Lamp Module, Remote Keyless Entry (RKE) Module, Anti-Theft Controller Module, Radio Illumination 13 15 Radio, CD Disc Changer 14 5 Electronic Chromatic Mirror, Analog Cluster Indicator Lamps, Air Bag Module 15 — Not Used 16 15 Horns, Horn Relay Coil 17 15 Fog Lamps 18 25 Front Wiper Motor, Front Washer Pump, Wiper/Washer Relays 19 10 Generic Electronic Module (Pin 57), Electronic Instrument Cluster 20 25 Integrated Relay Control Module, Ignition Coil 21 10 Air Bag Module, Rear Window Defrost Relay, A/C Clutch, Temp Blend Door Actuator, Brake Shift Interlock 22 20 Rear Cigar Lighter, Power Plug 23 15 Multi-Function Switch 24 20 Rear Wiper Motor, Rear Washer Pump 25 10 Turn Signal Lamps, Instrument Cluster Turn Indicator 26 15 LH Aero Headlamp, Left and Right Trailer Stop/Turn/Hazard 27 15 Hazard Warning Lamps, Instrument Cluster Turn Indicator 28 15 Instrument Panel Cigar Lighter 29 15 Battery Saver Relay, Interior Lamp Control Relay, Interior Lamps, RH and LH Keyhole Lamps 30 25 Backup Lamps, Electronic Cluster 31 10 Rear Air Suspension 32 15 RH Aero Headlamp, Trailer Park Lamps 33 15 Anti-Lock Brake (ABS) Relay, Anti-Lock Brake (ABS) Module, Daytime Running Lamp (DRL) Module 34 30 One Touch Relay, LH Window Motor 35 15 Anti-Theft Controller Module 36 30 A/C Mode Switch 37 20 Door Lock Actuators, Memory Door Lock Relay 38 15 Heated Mirrors (LH and RH) 39 30 Auxiliary Blower Motor, Ref. Valve Solenoid 40 30 Window Motor (RH) 41 5 Autolamp Relay Coils, Autolamp Sensor 42 — — 43 — — 44 — —