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I am looking for a diagram of the Electronic Engine Control- relay and how this effects the starting & run feature

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I have a 1993 Crown Victoria. I left the key turned forward the other day for about 45 minutes. I Thought it was the battery but it wasn't. So i was trying to find out if it could be the EEC Power Relay Fuse?

Posted on Oct 19, 2010

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The ignition switch powers the EEC relay, and the relay turns on the EEC which runs the fuel pump relay. So I would replace both as both have a lot of problems. As for a diagram, you will need to go to AutoZone and I think they can print one out for you on their ALLDATA program.

Posted on Sep 08, 2010

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1 Answer

2004 cadillac cts wont start only with relay jump start


What relay ? Starter relay ? Check engine light on ? Do you know how to test power and control circuit at the relay base ? where the relay plugs into ? The PCM - engine computer is suppose to energize that relay , IF it see's a input from the transmission range sensor switch (park or neutral ) or if there are no anti-theft system problems . Pull the relay and look at the bottom (where pins are ) you will see four sets of numbers . 30 & 87 and 85 & 86 .30 should have B+ voltage 87 goes down to the starter solenoid . If you used a piece of wire an jumped those two the starter should crank .(if it's good ) Pin's 86 & 85 - one should have B+ voltage and the other the ECM supply's a ground .
http://www.bbbind.com/free_tsb.html free wiring diagrams . Enter vehicle info. year , make , model and engine size . Under system click on engine then under subsystem click starting . View the starter electrical system diagram .
VEHICLE RELAYS Testing from the relay base
Starter relay works the same

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1 Answer

2001 windstar wiper fuse location?


Wiper relays (2) on/off relay an speed relay , location battery junction box . Look at the wiring diagram here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine . System click body & accessories , subsystem click wipers/washers . Click the search button , then the blue link . After viewing the wiring diagram for the wipers , Change systems to electrical distribution , then click junction block . Then the search button an first blue link . Shows the relay position . The wiper switch is a input to the front electronic control module . The relays are also controlled by the electronic control module . Probably has code set in the module . You would need a factory scan tool to check this .

Jun 24, 2017 | Cars & Trucks

1 Answer

2000 JIMMY 4.3 WONT START AND KEEP BLOWING MAIN 40AMP FUSESE


What all does that fused supply B+ voltage too ? Do you know ? That would be your first thing to find out ! Do you know what a electrical distribution diagram is ? Do you know how to test electrical circuits with a DVOM - digital volt ohm meter ? Do you know what a short to ground is ?
Which fuse ? IGN A - 40 amp ,under hood fuse / relay box ? This fuse powers the Starter Relay and Ignition and Start Switch
Does your vehicle have a manual or automatic transmission ? The starter relay could be shorted inside , It's also located in the under hood fuse box . If you pull the relay out of the box it's plugged into an look on the bottom of it you would see four sets of numbers ! 30 & 87 an 85 & 86 . If you were to jump 30 to 87 in the relay box the starter should spin the engine over , not start an run just spin ! 85 & 86 is the control side . Could be the ignition switch !
That 40amp fuse powers a lot of subsystems !

Here is a web site for free diagrams !
http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine , Under system click on electrical distribution , under sub system click on power distribution . Then click the search button .Click blue links one at a time . First blue link scroll down to the second diagram . You will see Ign A 40 amp fuse at the top of the page .you will also see it powers the igintion switch ,look at last part of ignition switch , when in start or run that 40 amp fuse powers all those other fuse's plus three relays i see there also . A/C compressor relay , rear window defroster relay ,daytime running lights . Any one of those circuits could have your short . You need to isolate the circuits , pull fuse's till the fuse doesn't blow !

May 27, 2017 | Cars & Trucks

1 Answer

1998 Sable will start and drive then after shutting it of won't start not even try to turn over for hours maybe a day then will start right up


When it won't start testing the electrical systems is the proper way to find a fix . Using a DVOM - digital volt ohm meter and power flow diagrams . Using voltage drop testing !
How to voltage drop test starter motor circuit
How to test starter engine doesn crank GM 3800 engine
Electric Testing Techniques You Need to Know
Do you know what a wiring diagram is ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine size . Click on engine under system then under subsystem click on starting .Then click on the search button , then on the blue link . This is a wiring diagram of the starter electrical circuit. Do you know what ignition switch is ? the electrical part. , how about the starter relay , transmission range sensor ! There is one thing you can try , move gear selector to neutral an see if it starts then . If that does nothing ,check for B+ voltage going at the starter relay . Jumping pins 30 & 87 at the relay socket , where the relay plugs into . will cause the starter to engage an spin the engine . If you look on the bottom of the relay you will see four sets of numbers 30 & 87 - 30 should have B+ voltage , 87 goes to the S terminal on the starter solenoid . An 85 & 86 are the control side .86 at the relay socket comes from ignition switch through the trans range sensor to the starter relay coil ( electro magnet ) . Watch these videos too .
VEHICLE RELAYS Testing from the relay base

VEHICLE RELAYS Operation Diagnosis




Apr 29, 2017 | 1998 Mercury Sable

1 Answer

Find a Diagram for 1989 Lincoln Towncar 4 Door Fusebox


this is for the base model


FUSE PANEL IDENTIFICATION (1983-90 LINCOLN TOWN CAR) The fuse panel is located in the instrument panel to the left of the steering column. To expose fuse panel, remove lower steering column finish panel.

Fuse & Circuit Breaker Identification

· 1 - 15 Amp Stoplights, Hazard Warning Lights, Speed Control Module, Trailer Tow Relays, Cornering Light Relay (1983-89)
· 2 - 8.25 Amp (Circuit Breaker) Windshield Wiper/Washer
· 3 - Blank
· 4 - 15 Amp Taillights, Side Marker, License Light, Parking & Coach Lights, Cluster Illumination, Trailer Tow Relay
· 5 - 15 Amp Turn Signal & Back-Up Lights, Trailer Tow Relay, Cornering Light Relays, Heated Rear Window Relay, Rear Defrost (1988-90), A/C Clutch & ATC Module (1990), Load Leveling (1990)
· 6 - 20 Amp Heated Rear Window Control, Speed Control Module & Clock Display, Illuminated Entry Module, Power Window & Police Accy Relays, Fuel Filler Door Release (1983-87), A/C Clutch & Cornering Lights (1983-89), Deck Lid Release (1987-90), Tripminder
· 7 - 10 Amp Daytime Running Light Resistor (1990)
· 8 - 15 Amp Dome LP-Clock, Key Warning Chimes & Electric Mirrors, Courtesy & Visor Mirror Lights, Autolight & Illuminated Entry Modules, Tripminder, Electronic Radio Memory, Trunk & Underhood Lights
· 9 - 15/30 Amp Heater Blower (15 Amp), AC/ATC Blower (30 Amp)
· 10 - Blank
· 11 - 20 Amp Radio & Power Antenna, CB Radio
· 12 - 20 Amp Door Cigarette Lighters, Power Seats & Door Locks (30 Amp), Tailgate Power Window (1983-89)
· 13 - 5 Amp Illuminated Outside Thermometer, Instrument Panel Lights
· 14 - 20/25 Amp (Circuit Breaker) Flash-To-Pass, Sun Roof, Power Windows
· 15 - 10 Amp Taillights, Parking, Side Marker/Coach, License Lights
· 16 - 20 Amp Horn & Front Cigarette Lighter
· 17 - 15 Amp Electronic Cluster, Message Center
· 18 - 10 Amp Warning Indicator Lights, Throttle Solenoid Positioner, Low Fuel Module & Autolight System, Dual Timer Buzzer & Electronic Chimes, Electronic Message Center

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1 Answer

I have put a new fuel pump and filter in truck. i cant get no fuel in throttlebody


You are correct, this is a Throttle Body Injected engine. I had to look that up to be certain. For the two injectors to operate the computer must be operational, check the fuse(s) for the ECU, electronic control unit (the computer). Often there is a replay that can disconnect the injector ground connection in order to limit fuel when a engine over-revving condition exists too many RPMs). There can also be another relay for the fuel pump that can be dropped. Usually the fuel pump relay is cut of to limit engine RPMs. In the vent someone has direct-wired the fuel pump, the fuel pump relay being cut off would be ineffective to limit vehicle speed so dropping the ground (and killing power to the injectors) is done as a backup for safety. Verify the fuel pump runs for a moment when the key is switched to the run position. Use starting fluid to be certain it will run if fuel is provided. Consult a wiring diagram and look for relays in the wiring for the injectors.

Feb 26, 2012 | Cars & Trucks

2 Answers

Where located fuel sensor Suzuki Ario 2003


Component location diagrams for most 2003 Suzuki Aerio cars and light trucks sold in the U.S. from 1990+.
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Components on diagram:
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    Components on diagram:
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    Components on diagram:
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    1 Answer

    Location of relay carrier & electronic box


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

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    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.

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    1 Answer

    I just replaced the battery & had it arc. The check engine light is on. the gas pedal has no effect. But it will move forward in idle.


    check your Electronic throttle control unit and its electrical supply. the Electronic throttle control is located on the LH of the throttle body. Check all fuses and relays for shorts, there may be no power to the Electronic throttle control, which results in NO throttle movement. Hopefully this helps

    Aug 04, 2009 | 2003 Toyota Tundra

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