Question about 1994 Ford Bronco

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Blue circuit diagram1994 ford bronco

50 amp fuse hot on ground side w/ key in on position

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  • Contributor
  • 51 Answers

Check your wires to the starter and around the manifold they short easily if they rub on any surfaces

Posted on May 17, 2014

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Posted on Jan 02, 2017

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SOURCE: 2000 Ford Ranger 50 amp fuse burns out

Try disconnecting your alternator temporarily. It may have a shorted diode but that would also normally drain the battery too unless it charges over a relay.
The starter relay can't cause this alone and the currents through the ignition switch mostly control relays. If removing the alternator cable didn't work, I would remove the starter (only a few bolts) after disconnecting the ground cable from your battery and try turning it by hand. It should be stiff but not impossible and if it refuses to turn, it may have a short from the field to the case.  It isn't really possible to use a multimeter to check the starter's windings because they are very low resistance when normal (the beast draws 120-200 amps to start) and would look like shorts on a standard meter anyhow. 

Posted on Sep 27, 2008

  • 11 Answers

SOURCE: 1996 ford explorer windows, locks and seat fuse keeps blowing

Disconnect as many of the door switch wiring plugs, and wiring plugs for the seats that you can. Then, drop in a fuse. If it blows, you probably have a wiring issue, not a switch issue. If it doesn't blow immediately, reconnect the doors, and seats one at a time till the fuse does blow. Once it does, you've isolated your problem to a smaller area, and can replace / rewire that component.

If you've disconnected everything, and the fuse still blows, you probably have a wiring issue that will need to be traced. You will need a multimeter that can read ohms. You'll need to isolate different parts of the circuit (probably by unplugging and or cutting a wire in that circuit unfortunately) then use the multimeter to test the ohms from that part of the circuit to NON voltage side of the fuse holder. (If you try to test ohms on a hot circuit you will likely fry your multimeter!). If the meter reads low ohms, there is your short. High ohms (infinity) means there is no circuit, and there is no short. When you hit on something of low ohms, you've isolated the problem to a smaller area, and can keep tracing that wiring back to the fuse box to find your short.

Good Luck.

Posted on Jul 25, 2009

Awaji
  • 77 Answers

SOURCE: 2000 ford excursion battery draw

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i hop this will help

Posted on Nov 11, 2009

  • 1 Answer

SOURCE: Fuse panel diagram for 1990 ford bronco 2

Here's the diagram for the fuse panel under the dash. There is also a fuse panel under the hood next to the air filter.e589aae.jpg

Posted on Jan 29, 2010

SOURCE: short circuit on fuse 21 of a Ford Expedition any

I shouldn't assume, but I will.

You do have a wiring diagram?

When you say short, I will also guess a fuse blew?

Posted on Mar 16, 2010

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2000 Ford mustang 3.8 cranks won't start diagnostic gives code b1353


B1353 Ignition Key-In Circuit Open GEM Go to Pinpoint Test B .
PINPOINT TEST B: THE KEY-IN-IGNITION CHIME DOES NOT OPERATE CORRECTLY
Do you know what the GEM - genaric electronic control is ?
You need a scan tool to check ignition switch position .Don't know if this would cause a no start . Have you check for ignition spark and fuel pressure ? Are there anyother problems with power door locks or windows or lighting ? Thing's the GEM controls ?
CONDITIONS DETAILS/RESULTS/ACTIONS B1 CHECK IGNITION STATES
NGS
Monitor the GEM PIDS IGN_KEY, IGN_A, IGN_S, and IGN_R while cycling the ignition switch through the OFF, ACC, RUN, START and key out positions.
  • Do the PID values agree with the ignition switch states?
Yes GO to B2 .

No GO to B4 . B2 CHECK GEM INTERNAL TONE OPERATION Trigger the GEM Active Command CHIME ON and OFF.
  • Does the chime operate correctly?
Yes GO to B3 .

No INSTALL a new GEM. For additional information, REFER to Section 419-10 . REPEAT the self test. CLEAR the DTCs. B3 CHECK GEM INPUT FROM DOOR AJAR CIRCUIT Monitor the GEM PID D_DR_SW, while opening and closing the driver door.
  • Do the GEM PID D_DR_SW values indicate CLOSED and AJAR correctly?
Yes INSTALL a new GEM. For additional information, REFER to Section 419-10 . REPEAT the self test. CLEAR the DTCs.

No GO to Pinpoint Test D . B4 CHECK GEM INPUT VOLTAGE FROM IGNITION SWITCH AT CJB FUSE 28 (15A)
CJB Fuse 28 (15A)
Measure the voltage between CJB Fuse 28 (15A), Pin 1, harness side and ground while cycling the ignition switch through all positions.
  • Is the voltage greater than 10 volts in the RUN and START positions only?
Yes GO to B5 .

No REPAIR the CJB. REPEAT the self test. CLEAR the DTCs. B5 CHECK GEM INPUT VOLTAGE FROM IGNITION SWITCH AT CJB FUSE 32 (15A)
CJB Fuse 32 (15A)
Measure the voltage between CJB Fuse 32 (15A), Pin 1, harness side and ground while cycling the ignition switch through all positions.
  • Is the voltage greater than 10 volts in the RUN and ACC positions only?
Yes GO to B6 .

No REPAIR the CJB. REPEAT the self test. CLEAR the DTCs. B6 CHECK GEM VOLTAGE INPUT CIRCUITS FOR OPEN - IGNITION SWITCH CIRCUIT 911 (WH/LG)
CJB Fuse 28 (15A)

GEM C352
Insert ignition key. Measure the resistance between GEM C352 Pin 8, Circuit 911 (WH/LG), harness side and CJB Fuse 28 (15A) Pin 2, Circuit 911 (WH/LG), harness side.
  • Is the resistance less than 5 ohms?
Yes GO to B7 .

No REPAIR Circuit 911 (WH/LG). REPEAT the self test. CLEAR the DTCs. B7 CHECK GEM VOLTAGE INPUT CIRCUITS FOR OPEN - IGNITION SWITCH CIRCUIT 1002 (BK/PK) Measure the resistance between GEM C352 Pin 22, Circuit 1002 (BK/PK), harness side and CJB Fuse 32 (15A), Pin 2, Circuit 1002 (BK/PK), harness side.
  • Is the resistance less than 5 ohms?
Yes GO to B8 .

No REPAIR Circuit 1002 (BK/PK). REPEAT the self test. CLEAR the DTCs. B8 CHECK GEM INPUT CIRCUIT FOR OPEN - KEY-IN-IGNITION SWITCH CIRCUIT 158 (BK/PK) Measure the resistance between GEM C352 Pin 9, Circuit 158 (BK/PK), harness side and ground.
  • Is the resistance less than 5 ohms?
Yes GO to B9 .

No REPAIR Circuit 158 (BK/PK) and key-in-ignition switch for failure. For additional information, REFER to Switch-Key-In-Ignition Warning . REPEAT the self test. CLEAR the DTCs. B9 CHECK GEM VOLTAGE INPUT CIRCUITS FOR SHORT TO POWER - IGNITION SWITCH CIRCUITS 911 (WH/LG), AND 1002 (BK/PK)
CJB Fuse 28 (15A)

CJB Fuse 32 (15A)

GEM C352
Remove ignition key. Measure the voltage between GEM C352 Pin 8, Circuit 911 (WH/LG), harness side and ground, and between GEM C352 Pin 22, Circuit 1002 (BK/PK), harness side and ground.
  • Are voltages greater than 10 volts?
Yes REPAIR the circuit in question. REPEAT the self test. CLEAR the DTCs.

No GO to B10 . B10 CHECK GEM INPUT CIRCUIT FOR SHORT TO GROUND -- KEY-IN-IGNITION SWITCH CIRCUIT 158 (BK/PK)
GEM C352
Remove ignition key. Measure the resistance between GEM C352 Pin 9, Circuit 158 (BK/PK), harness side and ground.
  • Is the resistance greater than 10,000 ohms?
Yes INSTALL a new GEM. For additional information, REFER to Section 419-10 . REPEAT the self test. CLEAR the DTCs.

No REPAIR Circuit 158 (BK/PK). REPEAT the self test. CLEAR the

Jan 03, 2017 | Ford Cars & Trucks

1 Answer

Why is fuse E hot on ground side w/key in on position. w/fuse removed.


Fuse E is 15 amps, not 50 and does not have a "ground side". The fuel pump relay receives power through 20A fuse O. The fuse links are "hot all the time" because they are connected directly to the positive post of the battery.

May 16, 2014 | 1994 Ford Bronco

1 Answer

Just replaced the sending unit in my 1989 ford escort. getting fuel up to the injector but the injector isnt doing anything. whats the problem?


Check the injector circuit with a test light. Here's how: Turn key to on, not start. Ground the lead of a test light to a ground source, pull the electrical connector off an injector. There will be a power wire and a ground wire to each injector. With key on, power wire should have voltage. Probe the electrical harness to see if one of the injector terminals has power. Tester should light up. If nothing, check the injector fuse- under the hood or under the dash. The injector drive circuit (the hot side) should have power to the injector with key on. If not, check the drive circuit for a fault.

If the drive circuit works (the tester lit up on one terminal), then check the ground circuit. Move the test light clip to the positive post of the battery. Now probe the other terminal of the injector connector, the one that did not light the tester, and have someone crank the engine over. If ground circuit is working, the test light will now be blinking. If both tests are good, a steady light on the drive circuit, key on, and a blinking light on the ground circuit with engine cranking-then injector circuit is good.

Dec 03, 2013 | Ford Escort Cars & Trucks

1 Answer

Have no power out of the trailer plug 4or 7 prong,where should i look for the trouble?


Not sure which part you mean no power.

For the New Body style 2004 ( not a Heritage or Lightning model )

If both Stop / Turn pins & the parking lamps, might want to check the ground pin to make sure it is good ( or what you are using for ground on the test light / meter ).

The trailer tow parking lamp circuit is fuse #10 to the parking lamp relay

The stop / turn circuits also have fuses on each one, Fuse #36 & Fuse # 42 ( R & L ).

The 7 pin has fuses for the battery charge pin ( hot in run position ) and the reverse circuit ( hot in run & when in reverse ), Reverse is also fuse # 10 to the trailer tow reversing lamp relay & the battery charge pin is fuse # 106 to the trailer tow battery charge relay.

Could be all the fuses are blown, or what you are using for ground on the meter / test light is not a good ground.

Mar 16, 2011 | 2004 Ford F150

1 Answer

Will not crank turn key and nothing happens the car has power the starter is good the battery is good the relays are all good


Check fuse # 28 (15 Amp) with a test light. (Located in the Power Distribution Center (PDC) on the left side of the engine compartment) It should have power only when the ignition switch is turned to the START position. If there is no power there, then you probably have a bad ignition switch. The only other fuse involved would be fuse #8 (40 Amp) which is also in the PDC. If this fuse is blown a whole lot of stuff is not going to work - not just your starter. The starter motor relay (Also in the PDC) is controlled by the PowertrainControl Module. The wiring diagrams show it as a 5 pin relay whereonly 4 of the pins are used. If you check for power and ground at the connector pins for the relay, there should be one pin that is hot all the time. This is the power from fuse #8. a second pin should be hot with the key in the RUN and START positions. This would be the circuit running through fuse# 28. One pin should have continuity to ground (your test light should light up if you hook it to the battery positive terminal and probe this terminal.) This is the circuit that goes down to the starter. The 4th pin will have no continuity to anything at all until the ignition is placed in the START position, when it will have continuity to ground. This is the relay control circuit from the PCM.
If you dont have power at the relay connector as described, then you must repair the circuits between the fuses and the relay. If you don't have the grounds as describedfor the starter circuit, you ether have an open circuit going to the starter or a bad starter. If you are not getting ground on the control circuit from the PCM, it could be several other things causing your no-crank problem. It could be an open circuit between the starter relay and the PCM or it could be that the PCM is not allowing an engine start for one reason or another - The PCM will have to be scanned to find out what the problem is.

Mar 05, 2011 | 2004 Jeep Liberty

1 Answer

I have an 1988 bonco 2 with a 2.9 l V6 my problem is i keep burning up the 50 amp alternator fuse . i took the alternator had it test its working perfect but every time i put a new fuse in about...


Check your wiring going down to the starter and see if it is grounding out against the exhaust. If not check all your wiring to and from alt. Something is grounding out. 50 amp fuse is a big fuse so something is going to ground.

Jan 06, 2011 | 1988 Ford Bronco II

1 Answer

Batteryshort


this is a little vague on what the issue actually is.. All vehicle batteries are grounded to the body on the negative side so this does not explain anything. We need to know just what the issue is, like blowing fuses or something not working.. If you mean that the battery positive was grounded and now you have lost power, look next to or mounted on the battery for a bank of large fuses or wire links called fusible links. If you have accidently shorted a positive circuit to ground the chances are that you have blown one of these fusible links. They are easily replaced. The same goes for the vehicle circuit fuses which should be checked electrically with a test probe and any found to be blown should be replaced with a fuse OF THE SAME VALUE. NEVER replace a fuse with a higher value, this presents a serious risk of fire !!!

Apr 02, 2010 | 1984 Ford Bronco II

1 Answer

Im having trouble wiring a back window to a bronco


You may have better luck putting two in-line blade fuses as a fault protector, only substitute the blade fuse with a circuit breaker. It sounds as though you know how to make it go up and down. Adding the circuit breaker to the ground and using a common ground on the switch may save a couple of dollars instead of two inline.

Mar 20, 2010 | 1992 Ford Bronco

1 Answer

Relay Box for 1994 ford mustang cobra


relays are normally in the fuse panel on the left side of dash by knee.

Fuses and Circuit Breakers Location and Values
NOTE: The headlamp switch (11654) has an integral 20-amp circuit breaker.
  • The combination instrument panel fuse and circuit breaker panel contains most of the fuses and circuit breakers used in the system.
  • The fuses and circuit breakers are color-coded by amp rating.
  • The locations and values of the fuses and circuit breakers not contained in the panels are shown in the following chart.


Circuit Circuit Protection and Rating Location Headlamps and High Beam Indicator 20 Amp. CB Integral with Lighting Switch Heated Back Window 16 GA Fuse Link Engine Compartment Power Windows, Power Seat, Power Door Locks 20 Amp. CB Starter Motor Relay Load Circuit Fuse Link In Harness Engine Compartment Lamp Fuse Link In Harness Convertible Top 25 Amp. CB Lower Instrument Panel-Reinforcement


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Cavity Number Fuse Rating Color Circuit Protected A 40 Amp Orange
  • Ignition Switch
B 40 Amp Orange
  • Ignition Switch
C 40 Amp Orange
  • Ignition Switch
D 50 Amp Red
  • Headlamp Switch
  • Instrument Panel Fuses 4, 8 and 16
  • Instrument Panel Circuit Breaker 12
E 20 Amp Light Green
  • PCM
  • Fuel Pump
  • HO2S (3.8L)
  • Canister Purge Solenoid
  • EVR Solenoid
  • Ignition Control Module (3.8L)
  • IAC Solenoid
  • Fuel Injector
  • Automatic Transmission
  • Camshaft Position Sensor (3.8L)
  • MAF Sensor
F 40 Amp Orange
  • Heated Back Window
G 20 Amp Yellow
  • Fuel Pump
H 60 Amp Blue
  • Fan Control
J — — Not Used K 10 Amp Blue
  • Anti-Lock Brake Control Module
L 20 Amp Red
  • Fan Control Monitor (PCM)
M 25 Amp Yellow
  • Horn
  • Foglamps
  • Daytime Running Lights Control Module
N 25 Amp Clear
  • Fuses 5 and 9
P 20 Amp Clear
  • Radio Amplifier
Q 20 Amp Yellow
  • Generator
S 30 Amp Yellow
  • Convertible Top Motor
T 60 Amp —
  • ABS

May 14, 2009 | 1994 Ford Mustang

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