Question about 1981 Ford F 150

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I am having wiring and electrical problems smoking wires no low beams stalling truck need to jump the 30 amp circuit breaker..

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I would highly advise against jumping the circuit breaker. If you were to do this I would at least have the Fire Dept on stand by or better yet already in the drive way. You obviously have a short in the wiring somewere. The breaker is your saftey against burning the car to the ground, but they can only do so much. You need to find were the wires were smoking and repair these before you do any thing else.

Posted on Sep 11, 2009

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1986 dodge w150(power ram) headlight stuck on high beams. Also having trouble with passenger headlight not working. Already replaced Hi/Low dimmer switch.


Have you checked the relay in the circuit. You really need a schematic of the wiring diagram. Electrical can be tricky without the wiring diagram.

Jul 22, 2017 | Dodge Cars & Trucks

1 Answer

2005 honda acc'd lx front lights low beam out but high beams are fine. fuse box under hood both h & low beams use same fuse is there a different fuse I am unaware of in the circuit that I can check?


The low beams have a different fuse then the high beams. High beams fuse's 3 & 5 both 10amp . low beams are 1 & 6 both 10 amp . plus there is a relay control module . The relay for the low beams could be bad ,or the light dimmer switch is bad . or the combination switch control unit is the culprit . You can find a wiring diagram at http://bbbind.com/free_tsb.html . Check out some basic electrical trouble shooting videos on you tube an test the circuit .That's best advice I can give , trouble shooting automotive electrical systems is no easy task . Especially for a rookie . Headlamp switches are not wired directly to the headlamps , the switch is a low voltage input to the combination switch control unit ,which then sends a signal to the relay control module for activation . All electronics

Oct 05, 2016 | 2005 Honda Accord 2.4 LX

1 Answer

Have a dirt bike with headlight. Three wires for hi/lo, how do I put two fog lights in place of that head light without too much wiring work. I don't need hi/lo option


one wire will for high beam
one wire will be for low beam
the last wire will be ground wire
as fog light have only one beam you can use the low beam wire and parallel wire it to the fog lights
that way you have the head lights still and the fog lights as accessories correctly wired according to regulations
how to do it simply-- find the low beam power wire ( light switch on low beam and power at the light bulb check ed with a multi meter set on volts
solder , piggy back, or double plug in a connection into that wire and run one wire to the left fog light and one to the right fog light connect each fog light to an individual ground wire and connect those wires back to the ground wire for the main lights
Now having done that simple addition to the lighting system another problem has come up
The wiring will now be too light to carry fog light current and or the light switch will burn out
To over come this problem, the circuit needs a relay
fit a relay on the bike and now run the low beam wire to a terminal of the relay
run the other terminal wire to ground
this enables the relay to operate when the low beam is switched on but at this will not switch on the lights yet
now you have to run a heavy gauge wire (fused at the battery) to one of the power terminals of the relay and from the other power terminal to the connection for the fog and low beam lights
Now it all works switch on the high beam and no for lights
change to low beam and the fog lights come on as well
All nice and legal
Of course if you don't care about being legal just buy a 30 amp toggle switch and run a fused wire directly to the switch from the battery to the lights and then to ground from the lights
You will know that the generator / alternator for the bike will not be able to run the fog lights with or without the main lights so what will you have achieved

Feb 28, 2016 | Cars & Trucks

1 Answer

As soon as I turn headlights on it blows the fuse for gages on dash no wires touching and lights don't come on gages work if I don't turn headlights on


Hi Bobbi
A 50w Headlamp will draw 4 Amps (Ohms Law 50/12=4.1)
So... 2 Low beams will draw 8 Amps.
Obviously more for high beam and high wattage Quartz Bulbs.
That is a lot for a small switch (contacts) to handle.
This is why a lot of vehicles use a Relay to power the Headlamps.
The relay is connected directly from the Battery to the Headlamps.
The large internal contacts can handle the higher current (30A) and the dash headlight switch connects to the magnetic coil inside the relay and is only used to pull the contacts closed.
Does your circuit include a relay.? Do you hear a relay click?
simple headlight relay wiring

To assist with your troubleshooting, try disconnecting one head lamp bulb to reduce current load. Does the fuse blow?
A temporary12v circuit breaker could be substituted for the fuse until you determine the problem.


If the circuit is using a relay then there will be a fat wire going from the battery to the Relay. The fine wire on the relay input is the trigger. A 12v test lamp is really useful for troubleshooting around the car. Also a cheap multimeter. Clamp style current meter is also handy to see exactly what current is blowing the fuse

Relays

http://www.ebay.com.au/itm/NARVA-CIRCUIT-BREAKER-REPLACES-STANDARD-BLADE-FUSE-BATTERY-15A-AMP-12V-55715-/321234642731?hash=item4acb13a72b
There is a 10A circuit breaker also like above

Automotive Circuit Breakers Wiring Products

Sep 13, 2015 | Cars & Trucks

1 Answer

Replace 15 amp fuse to a 30


NO,NO,NO ! Fuses are electrical protection for the cars wiring installing a higher amp-age fuse takes longer to blow so your wiring gets hotter and starts to melt the insulation and shorts to other wires eventually burning up the harness. With a amp meter test the circuit to see how much power is needed to keep the circuit going if over rated (15 amp circuit taking 20 amps) then install a cycling circuit breaker 10 amp this will blow and cool and blow again continually then with a magnetic amp meter (Gauss meter) you can locate your short the source voltage causes the amp meter to jump as the fault occurs when you pass it meter will stop working.

Apr 22, 2014 | 2002 Ford Escape

1 Answer

Headlights not working


Not a fuse problem , same fuse power's low an high beams . Looking at wiring diagrams an using a DVOM - digital volt ohm meter to test the electrical circuit's is the way to find the problem . The light's staying on for 3 or 4 min's. is a function of the BCM - body control module ! Do you know anything about automotive electrical testing ? Do you know what a wiring diagram is an how to read one . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. Year , make , model an engine size . Under system click on lighting ,then under subsystem click on headlamps .Click the search button then the blue link. get yourself a cheap DVOM an test the electrical circuit's , this is how electrical problems are solved .
Electric Testing Techniques You Need to Know
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts

Plus reading factory service repair info for how it should work would be a good idea .

Headlamps
The headlamps may be turned on two different ways. First, when the driver places the headlamp switch in the HEADLAMP position, for normal operation. Second, with the headlamp switch placed in the OFF position, for automatic lamp control (ALC). During ALC, the headlamps will be in day time running lamp (DRL) operation in daylight conditions, or low beam operation in low light conditions. The LH HDLPand RH HDLP fuses, supply battery positive voltage from the underhood junction block to the left and right headlamps. The circuit continues through both low and high beam lamps, then back to the underhood junction block. The low beam and high beam circuits continue to the headlamp switch. The low beam and high beam circuits also provide the body control module (BCM) with both low and high beam inputs. The headlamp switch includes the dimmer switch and the flash-to-pass switch. When the headlamp switch is placed in the HEADLAMP position a path to ground is provided. Ground is provided at G201. Depending on the position of the high/low beam switch, either the low or high beam circuit will now have power and ground.
The LH HDLP fuse in the underhood junction block, supplies battery positive voltage to the automatic lamp control (ALC) headlamp relay coil circuit. The ALC relay switch circuit is connected to the low beam circuit at the headlamp switch. When the headlamp switch is placed in the OFF position, the BCM will automatically turn on the low beams in low light conditions. The BCM energizes the ALC relay, closing the switch contacts and grounding the low beam circuit. Ground is provided at G201. With the headlights in the low beam position, the high beams may be momentarily turned on or flashed with the dimmer switch handle. The flash-to-pass feature is accomplished by pulling the dimmer switch handle toward the driver. The headlights may be switched to high beam with the opposite movement of the dimmer switch lever. When the headlamp dimmer switch handle is pulled toward the driver, the flash-to-pass switch closes grounding the high beam circuit. Ground is provided at G201. Both high beams will remain on until the driver releases the switch handle.
If the driver places the headlight switch in the HEADLAMP position , the headlights will remain on until turned off or the battery runs dead.
Do you know what a factory diagnostic trouble shooting chart is ?

Headlamps Inoperative - Low Beams

Step
Action
Yes
No
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics
1
Did you perform the Lighting System Diagnostic System Check?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Lighting Systems
2
Place the headlamp switch in the HEADLAMP position.
Place the headlamp dimmer switch in the LOW position.
Do the low beam headlamps illuminate?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
3
Disconnect the turn/headlamp wiper switch assembly connector C2.
Connect a 15 amp fused jumper between the headlamp low beam signal circuit and a good ground.
Do the low beam headlamps illuminate?
YES - Go to Step 4
NO - Go to Step 5
4
Inspect for poor connections at the harness connector of the turn/headlamp wiper switch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 7
NO - Go to Step 6
5
Repair an open or high resistance in the headlamp low beam signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
YES - Did you complete the repair?
NO - Go to Step 7
--
6
Replace the turn/headlamp wiper switch assembly. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column.
Did you complete the replacement?
Go to Step 7
--
7
Operate the system in order to verify the repair.
Did you correct the condition?
YES - System OK
NO - Go to Step 3

Dec 24, 2017 | 2002 Pontiac Grand Am

2 Answers

1998 ford e150 one headlight dont work already tried new light


If you replaced the bulb and are sure the new one is good, you have a wiring concern. First you need to be sure the terminals at the headlamp connector are making a tight connection. If this is good, check for a good ground at the black wire by using a test light with the clip connected to the positive battery terminal. Touch the test light to the black wire and it should light. If ground is good check for voltage, again using the test light but with the clip on the negative terminal. Test at the red/black wire for low beams or the light green/black wire for high beam. Low beams use 10 amp fuses #'s 25 and 31. High beam uses fuse # 30 and is 15 amp. If voltage or ground is not present and the fuse is good you need to trace the circuit and repair the wire.

Apr 06, 2011 | 1998 Ford Econoline

2 Answers

Cooling fan is not coming on at all how do i wire it up to come on when car is started and stops when car is turned off


Here is a wiring diagram of how you should by-pass that cooling fan by using a toggle switch, and you can get a fuse holder and use a 30 amp fuse instead of a 30 amp circuit breaker, but you should use the circuit breaker since you are no longer using a relay, and if there is a voltage spike the circuit breaker will reset itself, and a fuse will blow out and you will have to change it. Most auto parts stores will carry the 30 amp toggle switch and circuit breaker, also be sure to use 10 ga. wire and do not forget the wire connectors that you will need to attach the wires to the toggle switch, the circuit breaker, and to the battery as well as the connection to the cooling fan wires.

This wiring diagram is very basic and you should be able to follow it with little difficulty, and you should also dis-connect the cooling fan at the wiring connector to the cooling fan and connect the by-pass wiring directly to the cooling fan motor so that you do not run voltage back through the stock system. Let me know if you require further assistance.


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Jun 04, 2010 | 1992 Pontiac Bonneville

1 Answer

I need a fuse box diagram for a 1992 Ford Ranger. Any idea where I could find one?


owner manual.

here's the big ones for 1994 ranger. all i have
Section 18-01: Wiring and Circuit Protection 1994 All Ranger, Explorer and Aerostar Vehicles Workshop Manual
SPECIFICATIONS Specifications

High Current Fuses And Circuit Breaker — Ranger 2.3L, 3.0L And 4.0L
Circuit Size Location Electric Fuel Pump 20 Amp Fuse Power Distribution Box Headlamp Switch Feed 40 Amp High
Current Fuse Power Distribution Box #36 Circuit Alternator Output #2 15 Amp Fuse Power Distribution Box Fuse Panel 60 Amp High
Current Fuse Power Distribution Box Power Locks 20 Amp High
Current Fuse Power Distribution Box #38 Circuit Alternator Output #1 12 Ga Fusible
Link Integral with 14305 W/A Powertrain Control Module and Power Relay 30 Amp High
Current Fuse Power Distribution Box 4x4 Electric Shift 20 Amp High
Current Fuse Power Distribution Box Ignition Switch Feed 60 Amp High
Current Fuse Power Distribution Box High Beams and High Beam Indicator 22 Amp C.B. Integral with Headlamp Switch Front Wiper and Washer 6 Amp C.B. In Fuse Panel Power Windows 30 Amp C.B. In Fuse Panel Cigarette Lighter, Flash to Pass and Power Lumbar 20 Amp C.B. In Fuse Panel


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May 13, 2009 | 1992 Ford Ranger

3 Answers

2008 Ford F-250 Low beams do not work. High beams are fine.


it could be Bad dimmer switch .just check out the switch.

Jan 10, 2009 | 2008 Ford F 250 Super Duty 4WD

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