Cars & Trucks Logo

Related Topics:

Marc Larocque Posted on Feb 18, 2012

Help solve relay buzzing

Can here a relay buzzing when key is out of the ignition switch. Located noise under hood in fuse box . Pulled a 4 pin micro relay out and the buzzing stops. Engine will turn over but not start without this relay. Maybe the fuel pump relay. Swapped the relay with another identical one and still get the buzzing from this same place. Van starts and runs great but this buzzing I think is the beginning of more serious problems.

5 Related Answers

Scorpedo

Jamie Heppner

  • 111 Answers
  • Posted on Dec 12, 2008

SOURCE: 2005 Chevy express Fuel pump relay meltdown 6.0L

The horn relay was shorting out but not activating the horn. When you swapped it out it sounds like the fuel pump was running all night killing the battery. It sounds like the relay had a dead short inside and melted itself to the fuse box. Depending on the extent of the damage you might have to replace the fuse box as well as the relays.

Ad

Anonymous

  • 5 Answers
  • Posted on Oct 09, 2009

SOURCE: Intermittent fuel pump engagement when turning key - 2001 Taurus

try cleaning the connector that goes to the fuel pump, sometimes they corrode on inside. If that does not fix, test the wires feeding fuel pump with a multi meter until the condition shows itself again, if voltage drops to zero or very low then wiring problem, if voltage is unchanged with problem and fuel pump is not working and connectors are all clean, try replacement of fuel pump.

Anonymous

  • 3741 Answers
  • Posted on Oct 24, 2009

SOURCE: My 2000 Ford Expedition has

If it is a single click, the problem lies in the starter solenoid or relay. If it is several clicks in succession, the battery may be low or there may be a loose cable. ---------- also try this :-- Please make sure the battery is fully charged before doing this test! Also make sure all the connections on the starter, battery and cable ends are tight and clean! this is important!! This won't be fun to test but it will tell you if the starter is good or not. Crawl under the car. (Make sure you use the proper jacks and jack stands!) find the end of the starter (not the end that is attached to the bell housing) and find the solenoid switch. it should have 3 bolts on it. Two large ones and a small one. The top large wire should be the positive battery cable, the bottom large wire should go into the starter and the small wire should be from the ignition switch. Take a wire and hold it to the top large wire on the solenoid. (be careful of the other end of that wire when you have it connected to the top large wire of the solenoid! don't ground this wire. it will turn out badly. take the other end of the wire and touch it to the small bolt on the solenoid end. If the starter is working, the solenoid should engage and the starter will turn. If this happens it is most likely the ignition switch. If the starter doesn't turn, the starter could be bad. ==== Starter Relay Test
Place transmission in Park.
Apply parking brake.
Check for battery voltage between starter relay battery terminal and ground.
Connect jumper wire on starter relay between battery and ignition terminals.
If engine does not crank, connect a second jumper wire to starter relay between ground terminal and good ground and repeat test.
If engine cranks in step 3, transmission linkage is misadjusted or neutral safety switch is defective.
If engine does not crank in step 3, starter relay is defective.
Follow this step by step and you will pinpoint the problem.
--------
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya.




Anonymous

  • 3533 Answers
  • Posted on Nov 02, 2009

SOURCE: 1997 Ford Explorer XLT / Fuel delivery problem / 4.0L V6 engine

if it was me i would make sure its not the fuel pump relay give these websites a try www.alldatadiy.com and www.autozone.com if all fails stop by your local library and get your hands on a Haynes auto repair Manual for your SUV wish you the best of luck Michigan Man.

Anonymous

  • 8 Answers
  • Posted on Nov 09, 2009

SOURCE: Dodge Intrepid 1998 2.7 V6. Won't start. you turn

make sure you have spark, sometimes if you start bypassing stuff the ignition works only on a resistor to much electricity and it won't work, not enough and it won't work.

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2helpful
2answers

2004 Lincoln town car Signature series-electrical problem with headlights

fuses check first
and scan the PCm is next, for DTC errors
this HL system is DLR, and work like the users guide tells and has sun sensor. too. and we all know DLR loves to fail
car drives perfectly not told, and matters.

qod:
"What could be causing the relays to buzz and the lights to be on even with the key out of the ignition and the light switch turned to off or automatic"
well if you scan the PCM/BMC obd2 port
and it told you the BCM is failing what then.?

THE BUZZ MAY BE ONE LCM DEVICE IS SHORTED
THE BUZZ IS THE CLUE .
SCAN THE PCM.

key off the BCM must turn off head lamps NO. not fully truth
elaborating?
The head lamps work key on, key off , and running or sun sensor says dark.
key off and HL switch of sure the HL must turn off or the BCM is bad or the switch telling it OFF is bad.
Key if lamps must work on demand, if not bcm bad or cars battery is dead, /weak, I asked if engine runs and fuses all tested good, front bay and cab fuse boxes.
FSM factory service manual words now. reading to you now.
on this car the HL switch 7 pos. wire to the LCM
lighting control module
2 fuses, 2.7 and f2.31 must be good. in the CJB
the central JUNCTION BOX. (FUSE BOX LINGO)
LCM HAS 8 FUSES. WOW.
LCM RUNS HIGH BEAMS LEFT AND RIGHT,,
NOT MARRIED, TO 1 WIRE.
THE LCM DRIVES THE WIPER WASHER DIRECTLY
THE LCM DRIVE POWER TO PIN2 ON WIPER MOTOR
SO PULL THE WIPER MOTOR CONNECTOR AT MOTOR
SEE IF BUZZ STOPS
LCM IS REALLY A BCM BUT THEY CALLED IT WRONG
BUT CAR IS OLD AND THEY DID THAT.
LCM RUNS VAST THINGS ON THIS CAR.
EVAN THEFT SWITCH AND HOOD AJAR SWITCH
NOT SCANNING THE PCM PORT YOU MISS ALL THOSE FAILURES. CODES
IS THE PATS LAMP HAPPY, IMMOBILIZER?
BE A SHAME IF HOOD SWITCH BAD
AND LIGHTS FAIL, HOOD UP MEANS WORKING UNDER HOOD, DAY OR NIGHT AND WHAT THAT DOES AT NIGHT IDK. BUT

FUSES ALL GOOD TESTED SO
SCAN THE PCM./BCM PORT, OBD2, TOOLS WORKS
LCM PAGE1 OF MANY.
https://imgur.com/a/Ih5l2Jd


lcm-all-undefined-undefined-0.jpg
0helpful
1answer

Replacing a fuse engine won't start 2005 Hummer h2

Is the anti-theft light lit on the instrument cluster ? Won't start how ? When you turn the key to start , what happens ? Nothing ? This would be a No crank - no start condition . Now if you turn the key to start and the starter engages and spins the engine and it doesn't start an run , this is a engine cranks no start condition ! Now which is your problem ?

There are two fuse's IGN A fuse 40amp and IGN E fuse 10amp ,both are located in the under hood fuse/relay box . Also there is starter relay located in the same under hood fuse /relay box . There also is a crank fuse 10amp in the under hood fuse box . Besides the fuse's and relay ,the ignition switch or the PNP - park neutral position switch could be bad . Testing the whole starter circuit should be done ! How to voltage drop test starter motor circuit
0helpful
2answers

I need to know where fuel relay is located on a 2005 hyundai xg350 ..thank you

We're is the fuel pump relay for a 2003 hyundia xg350 located
0helpful
1answer

2001 Chevy blazer came out one day and it was dinging as if my key was in it got it to start with a jump shut it off took battery out and charged it put it back in when I turn the key I get NOTHING!

Check power an grounds for ignition switch , voltage drop test the starter circuit . Go to youtube an check out videos on basic electrical trouble shooting , voltage drop testing ,how to read a wiring diagram .Then go here http://www.bbbind.com/free_tsb.html free wiring diagram ! Look at power distribution under electrical distribution . Check main fuse's Maxi fuse's that power the ignition switch ,IGN.C fuse 20amp in underhood fuse box ,then check crank fuse 10amp in same fuse box .Check the starter relay in the under hood fuse box . Check the circuit form ignition switch to the starter relay , pull the relay out an look on the bottom you should see 4 set's of numbers 30 - 87 - 85 - 86 . Pin 30 or 87 should have battery voltage ,one or the other ,not both . if you jump those two at the base (where it plugs in ) not the relay pins . It should crank the engine ( if starter is good an there are no opens in the circuit ) Pin's 85 an 86 are the control side of the relay ! You may want to check out videos on how a relay works also > Good luck hope this helps
0helpful
1answer

Battery was dead. -30 celcius outside. Boosted battery and truck started. After driving for a while, went to turn off truck, and with ignition switch off and key out, engine still ran as if the key was in....

I suggtes check in the Power Distrbution Box (under hood), the power distribution box, trailer tow and electronic shift on the fly relay blocks are located in the engine compartment near the brake master cylinder.

Look position 20, 50AMP (Maxi Fuse) for Ignition Switch (B4 & B5) ans position 21 (same sizes) for Ignition Switch (B1 & B3)...

zjlimited_592.jpg


Keep us updated.
0helpful
2answers

My 2003 gmc envoy brake lights quit working. I replaced the bulbs & checked all the fuses nothing. Replaced the brake switch still nothing. After connecting the battery, now the brake lights still...

Its possible that your THEFT SYSTEM or PASSLOCK SYSTEM is armed; check in the Owners Manual the procedure to disarm. Keep us updated about your advences.
0helpful
1answer

Wuen i turn off the ignition switch and i pull out the key the sound indicates that still you have the key inside of the ignition is still on.how can i get that soun off?

mcdevito75 here, The key completes a warning circut in the off position of the ignition switch, this buzzing sound is a relay usually in the fuse box, find the fuse box, leave the key in the switch, listen and locate the buzzing sound and remove the relay from the fuse box, this relay may also be alone just under and around the steering column.
2helpful
1answer

Have a 96 ford f250,cannot get fuel to carburator,wheres fuel relay and how do i solve my problem

First you'll want to check all your fuses in the interior fuse panel and replace any that are questionable. the fuel pump relay is located under the hood, sometimes mounted on the firewall but usually located in the main fuse box under the hood. After checking the fuses, put your keys in the ignition and turn it to K>O>E>O. Key On Engine Off, and listen to see if you hear the in tank fuel pump start buzzing and then cut off. It doesn't stay on at that point, it's just pressuring up the fuel system preparing to start. It might take a couple of times until you hear it. If you don't hear anything at all, and your fuses are good, Your in tank fuel pump is the more likely the culprit. It's about due for one being that its 13 years old. Merry Christmas.
1helpful
1answer

Fans stays running even when keys are out of ignition

Ok. that makes more sense. the relay should be in the fuse box under the hood. it should have a diagram under the cover to help you locate it. that is most likely the problem.
Not finding what you are looking for?

1,369 views

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

john h

Level 3 Expert

29494 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

15088 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...