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Under hood fuse box 18 has low voltage short . 2000 F150 when fuse is pulled both sides of link have power. one makes normal reaction to test light while other is very dim. my odomiter has stopped s

Fuse don't blow fuel rely never stop

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6ya6ya
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Posted on Jan 02, 2017

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chrischronic
  • 235 Answers

SOURCE: turn head lights on every light works except low beams

thare is a high beam relay and a low beam relay in the fuse box find the low beam relay and replace it. if this dont work its probabley the switch

Posted on Jan 13, 2009

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insanegtp
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SOURCE: 20 amp fuse in the box under hood that keeps blowing

Does it only do this when the heat or A/c is on full blast.. ( I had a few of my customers with this problem and they needed a new blower motor..)

Posted on Jan 26, 2009

  • 2 Answers

SOURCE: 1991 lincoln town carTail lights and turn signals stopped working

One of the tail light bulbs can be shorted internally.  Replace the tail light bulbs first.  Try this cheap fix first.

Posted on Mar 06, 2009

countrysi248
  • 443 Answers

SOURCE: Trunk pull Down Motor Suddenly stopped working

did it quit making the noise when you lightly push down on the trunk? most people slam these trunks and your not suppose to you are only to put light pressure on them and they pull it closed theirself.. you might check your relays under the hood and look in the box lid to see which one it is.. if this is not the problem you might have to replace the motor to the latch .. you might check with a test light to see if there is power to the motor first though .. thanks and holler if you have more Jerry .

Posted on Apr 26, 2009

motor1258
  • 6674 Answers

SOURCE: 97 dodge dakoata main fuse keeps blowing 140 amp fuse

Regulator in alternator obviously faulty, have it bench tested & fixed or replace alternator, and cure your problem.

Posted on May 19, 2009

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1 Answer

Now power to trailer lights on my 2012 f150


Check the fuse. There should be a black box under the hood that contains the fuses and relays. There is a fuse box normally on the left side kick panel under the dash with fuses also. You can check the fuses with an ordinary test light or by sight. This is the easiest for now.

Aug 01, 2017 | Ford F-150 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

01 expedition headlights stuck on


Low beam ? high beam ? DRL - daytime running lamps ?
  • The headlamps are on continuously
  • Headlamp switch.
  • Circuitry.
  • Multifunction switch.
  • DRL relay 2 (if equipped).
  • DRL jumper (if equipped).
  • Headlamp relay (if equipped).
  • RAP module (if equipped).
  • Light sensor amplifier (if equipped).
  • GO to Pinpoint Test F .

F1 CHECK THE HIGH BEAM CIRCUIT FOR SHORT TO POWER
Pull CJB Fuse 16 (20A) - central junction box ,inside the vehicle ! Ignition on !
  • Do the headlamps continue to illuminate?
  • Yes GO to F2 .
    No - REINSTALL the fuse.GO to F12 .
  • F2 CHECK CIRCUIT 12 (LG/BK), 160 (DB/WH), AND 161 (DG/OG) FOR SHORT TO POWER
  • pull fuse's CJB Fuse 21 (10A) , CJB Fuse 22 (10A)
  • Do the headlamps continue to illuminate?
  • Yes - REPAIR circuit 12 (LG/BK), 161 (DG/OG), or 160 (DB/WH) as necessary. TEST the system for normal operation.

    No - REINSTALL the fuses. If equipped with daytime running lamps (DRL), GO to F3 .

    If not equipped with DRL, GO to F6 .

  • YOU CAN FIND WIRING DIAGRAM AT
http://www.bbbind.com/free_tsb.html Do you know how to use a wiring diagram ? Videos on youtube .

F3 CHECK CIRCUIT 13 (RD/BK) FOR SHORT TO POWER
do you know how to do this test ?

pull the
DRL Relay 2

  • Do the headlamps continue to illuminate?
Yes REPAIR circuit 13 (RD/BK). TEST the system for normal operation.

No GO to F4 .


  • Do the headlamps continue to illuminate?
Yes REPAIR circuit 13 (RD/BK). TEST the system for normal operation.

No GO to F4 . F4 CHECK THE DRL RELAY 2 Carry out the relay test for the DRL relay 2; refer to Wiring Diagrams, Cell 149, Component Testing.
  • Is the relay OK?
Yes GO to F5 .

No INSTALL a new DRL relay 2. TEST the system for normal operation. F5 CHECK CIRCUIT 1032 (WH/BK) FOR SHORT TO POWER Measure the voltage between DRL relay 2 pin 2, circuit 1032 (WH/BK), harness side, and ground.
  • Is voltage present?
Yes REPAIR the circuit. TEST the system for normal operation.

No GO to F6 . F6 CHECK CIRCUIT 1033 (RD/YE) FOR SHORT TO POWER
Multifunction Switch C259
Measure the voltage between multifunction switch C259 pin 507, circuit 1033 (RD/YE), harness side, and ground.
  • Is voltage present?
Yes If equipped with DRL, REPAIR circuit 1033 (RD/YE). If without DRL, REPAIR circuit 13 (RD/BK), circuit 1033 (RD/YE), or DRL jumper as necessary. TEST the system for normal operation.

No If equipped with autolamps, GO to F7 . If without auto lamps, GO to F11 . F7 CHECK THE HEADLAMP RELAY Carry out the relay test for the headlamp relay; refer to Wiring Diagrams, Cell 149, Component Testing.
  • Is the relay OK?
Yes GO to F8 .

No INSTALL a new headlamp relay. TEST the system for normal operation. F8 CHECK CIRCUIT 7 (LG/YE) FOR SHORT TO POWER
Light Sensor Amplifier C216

Rap Module C257

Park Lamp Relay
Measure the voltage between headlamp relay pin 2, circuit 7 (LG/YE), harness side, and ground.
  • Is voltage present?
Yes REPAIR the circuit. TEST the system for normal operation.

No GO to F9 . F9 CHECK THE HEADLAMPS FOR ILLUMINATION Check the headlamps for illumination.
  • Are the headlamps illuminated?
Yes GO to F10 .

No CHECK the headlamps while reconnecting the RAP module and light sensor amplifier. INSTALL a new RAP module or light sensor amplifier as necessary. TEST the system for normal operation. F10 CHECK CIRCUIT 15 (RD/YE) FOR SHORT TO POWER Measure the voltage between multifunction switch C259 pin 15, circuit 15 (RD/YE), harness side, and ground.
  • Is voltage present?
Yes REPAIR the circuit. TEST the system for normal operation.

No GO to F11 . F11 CHECK THE MULTIFUNCTION SWITCH Carry out the multifunction switch component test; refer to Wiring Diagrams, Cell 149, Component Testing.
  • Is the multifunction switch OK?
Yes INSTALL a new headlamp switch; REFER to Lamp Switch-Headlamp . TEST the system for normal operation.

No INSTALL a new multifunction switch; REFER to Section 211-05 . TEST the system for normal operation. F12 CHECK CIRCUIT 632 (GY/OG) FOR SHORT TO POWER
Multifunction Switch C259
Measure the voltage between multifunction switch C259 pin 12, circuit 632 (GY/OG), harness side, and ground.
  • Is voltage present?
Yes REPAIR the circuit. TEST the system for normal operation.

No INSTALL a new multifunction switch; REFER to Section 211-05 . TEST the system for normal operation.

Jan 21, 2017 | Cars & Trucks

1 Answer

Right low beam headlight does not come on but my right turn signal will stay even tho i diddnt turn it on. If I cut on my high beams the rurn signal cuts off. Whats wrong? Helo


It could be the lamp control module !
Headlamps
Battery positive voltage (B+) is applied at all times to the lamp control module (LCM) through the underhood fuse block HDLP fuse.
When you place the headlamp switch in the HEAD position, the headlamps input to the LCM is grounded. The LCM then applies battery positive voltage (B+) through the underhood fuse block HDLOBML fuse and HDLOBMR fuse, which feed the left low beam headlamp and the right low beam headlamp respectively. When you activate the headlamp dimmer switch by pulling on the multifunction lever until the switch clicks, the high beam input circuit to the LCM in grounded . The LCM then removes battery positive voltage (B+) from the low beam headlamps and supplies battery positive voltage (B+) through the underhood fuse block HDHIBML fuse and HDHIBMR fuse, which feed the left high beam headlamp and the right high beam headlamp respectively.
Check this fuse in the left under hood fuse box first. HDLOBMR Fuse 18 10 Amp. RH Low Beam Headlamp . If the fuse is good check for B+ voltage with the low beams on . Use a test light or volt meter . If you look on top of fuse there are two metal tabs ,check there for B+ voltage , If no B+ voltage the LCM - lamp control module isn't supplying any .
Lamp Control Module (LCM)
Under the left side of the IP, to the right of the steering column
Turn Signal Flasher
Under the left side of the IP, to the right of the steering column
Lighting Systems Component Views in Lighting Systems
Lighting Systems Connector End Views in Lighting Systems
Turn Signal/Hazard Switch
In the left front of the passenger compartment, in the steering column

Apr 28, 2016 | 2000 Buick Park Avenue

1 Answer

Were is headlight low beam relay


It is located in the under hood fuse/relay box . It's non -replaceable ,if bad whole fuse box has to be replaced ! The low beam headlamps may be turned ON in 3 different ways:
?€¢
When the headlamp switch in the HEAD position for normal operations


?€¢
When the headlamp switch is in the AUTO position, for automatic lamp control (ALC)


?€¢
When the headlamp switch is placed in the AUTO position, with the windshield wipers ON in daylight conditions, after a 6 second delay

Battery voltage is applied at all times to the coil and switch sides of the LOW BEAM PCB Relay located in the underhood fuse block. When the headlamp switch is placed in the HEAD position, ground from G202 is applied through headlamps ON switch signal circuit to the body control module (BCM), signaling the headlamps ON request. In response to this signal, the BCM applies ground through the headlamp low beam relay control circuit energizing the low beam relay. With the relay energized, battery voltage is applied through the switch side of the relay, the left and right low beam fuses, and the low beam supply voltage circuits illuminating the low beam headlamps. Ground for the left headlamp is provided at G101 and the right headlamp at G100.
Low Beam Relay Test

  1. Ignition OFF, disconnect the C2 harness connector at the underhood fuse block.
  2. Connect a test lamp between the control circuit terminal A5 and B+.
  3. Ignition ON, command the Low Beams ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
  4. ?‡'
    If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.


    ?‡'
    If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.

  5. If all circuits test normal, replace the underhood fuse block.
  6. Ignition OFF, disconnect the harness connector at the inoperative low beam headlamp. Test for less than 5.0 ohms between the ground circuit terminal B and ground.
    ?‡'
    If greater than the specified range, test the ground circuit for an open/high resistance.

    Connect a test lamp between the supply voltage circuit terminal A and ground. Ignition ON, command the Low Beams ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    ?‡'
    If the test lamp is always ON, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the underhood fuse block.


    ?‡'
    If the test lamp is always OFF, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the underhood fuse block.

    If all circuits test normal, test or replace the low beam headlamp.

Jun 10, 2015 | 2006 Chevrolet Chevrolet Impala LS

2 Answers

98 ford ranger 4cyl 5 speed. When u turn the key to on position I get no warning lights on dash except battery light and seatbelt light. Nothing else.truck wont start. Dont even click.


Check the batter voltage first. If not that check fuse panel under hood for a 100 amp fuse check to see if the fuse is bad or if it has power. Also check fuseable link wire at starter to see if wire is still good. If it is bad, internal short possible on starter, take out and test it. Replace fusible link.

Mar 15, 2015 | 1998 Ford Ranger

1 Answer

No spark to plugs 1999 ford f150 4.6l


https://s21.postimg.org/wwpncpluf/pcm_power_relay.jpg

Click on the link.
Voltage for fuse 18 comes from, pcm power relay.
Terminal 30, load side of relay is fuse protected and hot all the time. If you unplug that relay and use jumper wire between terminal 30 and 87, fuse 18 should go hot. That should mean, the control side of relay has a problem, The control side needs voltage and ground.

Jul 24, 2017 | 1999 Ford F150 Regular Cab

2 Answers

I have an 04 F150 5.4L . I have a draw on my battery, I checked the battery with a light from the neg terminal to the battery post. I have pulled every fuse and the light continues to glow bright with a...


Would have no way of knowing

You can put the test light away though

You need to use an amp meter in either
battery cable lead and start over,doing what you
already did.

You have to wait ten minutes for some modules
to time out.

All your test light did, was drop battery voltage
across the bulb. You know the bulb is good,
nothing else.

This is an exercise in current draw,not voltage.

Mar 01, 2011 | 2004 Ford F150

4 Answers

My headlights on my 2000 monte carlo does not work


Day time running lights run low voltage to the high beam bulbs so it sounds to me like you need two new bulbs or you need to check the fuses and see if any need replaceing.

Dec 07, 2009 | 2005 Chevrolet Monte Carlo

1 Answer

89 5.0 f150 electrical problem, NOTHING in or on the truck has any power. blown fuse?


usually fusible links cause this look for a fuse box under the hood close to the battery if its there and has giant fuses in it it is probably one of them. If it does not have giant fuses then it is a wire type fusible link you can test either using a standard 12v test light just check both sides for power.

Aug 06, 2009 | 1989 Ford F 150

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