Question about 1994 Lincoln Town Car

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Battery ground wire cut that leads to "OBD II" wires on firewall.

Battery not lasting very long on 95 Signature w 56,000 MI. Charging normally per shop. Noticed small secondary wire from ground connect on the battery has been cut. Leads to fenderwall ground (wht and blk, blk wires). OBD II is on one of the wires from the fender ground mount. Any idea what it's function would be? Not showing in tech manuals I can get so far. Any idea how to reset the system once new battery is installed. You can enter your own entry codes.

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  • Rick Byrd
    Rick Byrd May 11, 2010

    hi K5 , ("Battery not lasting very long") , are we talking about the car
    battery and not the remote battery , just checking ? ("Noticed small
    secondary wire") - the negative side of the battery does have 2 black
    wires , a big one for the engine and a small one for misc. see pic .

    (wht and blk, blk wires) - i see a white and black wire that goes to that same ground point. see pic

    so G101 ground point carries both of these grounds . ("Any idea how to reset the system:) , - when the battery was / is disconnected it will have reset the system . see if these pics mean anything to you , so we can get on the same page (figure of speech)

    J5


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5 Suggested Answers

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SOURCE: 2000 lincoln ls : check charging system light

You could have a bad connection somewhere. Possibly on the alternator. You also may have a bad ground somwhere. Hope this helps any

Posted on Nov 16, 2008

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SOURCE: no spark 95 continenal

NO TEST FOR IGNITION MODULE , I can say that this seems to be your problem here.As this Engine is pretty Notorious for this Module I have Personaly Foun this Several times

Posted on Feb 11, 2009

SOURCE: Constant Power wire draining battery HELP!

Okay, I think I have it. The red and yellow wire into the deck need to be connected to two different power sources.

The red wire should only be hot when the accessory switch is on. The yellow wire is for constant power to maintain memory in the deck.

Connect the red wire to a source which is only hot when the ignition switch is in accessory position -- that should solve the problem.

Posted on May 06, 2009

steve_baldam
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SOURCE: Need help with 2004 Hyundai Santa Fe Audio Wiring

Sounds like you need a light tester. I would guess that at least 8 of the wires are speaker + & - the others will be Main power and earth Possibly electric ariel, Memory store and a wire for the anti theft circuit. Assuming the stereo is factory. Any Audio shop can perform a test to clarify the purpose of the wires Wouldnt worry about the blank its probably a position for a newer or different model to yours. Steve in the UK

Posted on May 13, 2009

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SOURCE: 1995 Lincoln Mark VIII altenator wiring problem

solid black wires on automobiles are ground wires I would suggest attaching to somewhere with a good ground...be sure it doesnt have any color stripe on it...i'm assuming you still have one side of the wire leading somewhere

Posted on Aug 04, 2009

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98 chevy malibu my alt isnt charging new alt batt test good cut out the fuselink on starter the alt wire runs thru firewall If i run a wire straight to the batt it is putting out 19v any suggestions


Did you check the fuse in the under hood fuse box ? GEN / BATT fuse 10amp . Is your check engine light on ? This is a computer controlled charging system , it should have four wires connected to the alternator . 1 - the heavier wire on the back ,this comes fro the starter - the one with fusible link , you could have checked for battery voltage with voltmeter ! The three other wires in the connector are the orange one ,this comes from the GEN / BATT fuse an should have battery voltage ! The last two come from the PCM - engine computer . The gray wire is the turn on signal from the PCM an the Red wire is the control from PCM ! Charging System Wiring Diagram MOTOR Magazine Article MOTOR Information Systems

Aug 14, 2015 | Cars & Trucks

1 Answer

How to fix


P0741 Torque Converter Clutch Circuit Performance or Stuck Off OBD-II Trouble Code Technical Description Article by Dan Weller ASE Certified Master Technician Torque Converter Clutch Circuit Performance or Stuck Off This diagnostic trouble code (DTC) is a generic OBD-II powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may vary depending on the model. What does that mean? Modern vehicles equipped with automatic transmissions / transaxles use a torque converter between the engine and transmission to increase the engine torque output and drive the rear wheels. The engine and transmission are actually connected by a fluid coupling mechanism inside of the torque converter which is what multiplies the torque until the speeds equalize and create a "stall" speed where the difference in actual engine RPM and transmission input RPM is around 90% efficient. Torque converter clutch (TCC) solenoids commanded by the Powertrain control module/Engine control module (PCM/ECM) or the Transmission control module (TCM) to direct hydraulic fluid and engage the torque converter clutch to create a solid coupling and increase efficiency. The transmission control module has detected a fault with the circuit that operates the torque converter clutch solenoid. Note: This code is similar to codes P0740, P0742, P0743 and P0744. There may be other diagnostic trouble codes associated with the transmission control module that can only be accessed by using an advanced scan tool. If any additional transmission related DTC's appear in addition to the P0741, an electrical failure is likely. Symptoms Symptoms of a P0741 trouble code may include: Performance or Stuck Off Indicator Lamp (MIL) illuminated (a.k.a. Check Engine Light) Minimal decrease in fuel economy, this will not affect engine performance Potential Causes Causes of this DTC may include: Wiring harness to transmission shorted to ground Torque converter clutch (TCC) solenoid internal short Transmission control module (TCM) Diagnostic Steps for P0741 DTC Wiring harness - Check transmission wiring harness for damage or loose connections. Use a factory wiring diagram to locate the appropriate power source and all connection points between circuits. The transmission may be powered by a fuse or relay, and triggered by the TCM. Disconnect the transmission harness at the transmission connector, power source and TCM. Check for a short to ground inside the transmission internal wiring harness by locating the appropriate + and - pins for the torque converter clutch solenoid. Using a digital volt ohm meter (DVOM) set to ohms scale, check for a short to ground in the circuit with the positive lead on either pin and the negative lead to a known good ground. If resistance is low, suspect a short to ground the internal harness or the TCC solenoid - removing the transmission oil pan may be necessary to further diagnose the TCC solenoid. Test the wiring between the TCM and the wiring harness connector at the transmission case using the DVOM set to ohms. Check for a possible short to ground by moving the negative lead on the DVOM to a known good ground, resistance should be very high or over limit (OL). Torque converter clutch (TCC) solenoid - Check the resistance in the TCC solenoid and internal transmission wiring at the transmission case after removing the transmission harness plug (if applicable, some makes/models use a TCM bolted directly to the transmission case). Some makes/models use a transmission wire harness with the TCC solenoid and internal harness as a single unit. Using the DVOM set to ohms, check for a short to ground with the positive lead on either circit to the TCC and the negative lead on a known good ground. Resistance should be very high or over limit (OL), if it is low, suspect a short to ground. Check for voltage on the power side circuit of the TCC solenoid or at the wire harness connector at the TCM with the DVOM set to volts scale, positive lead at the wire being tested and the negative to a known good ground with the vehicles key on/engine off, battery voltage should be present. If no voltage is present, determine the loss of power back through the circuit using the manufacturers wiring diagrams for reference. Transmission control module (TCM) - Since the torque converter clutch is only activated during certain driving conditions, it will be necessary to monitor the TCM with an advanced scan tool to determine if the TCM is commanding the TCC solenoid and what the actual feedback reading is at the TCM. The TCC solenoid is normally controlled by a duty cycle to engage a more comfortable torque converter cluch engagement. To test if the TCM is actually sending the signal, a graphing multimeter set to duty cycle or a digital storage oscilloscope will be required as well. The positive lead is probed into the wiring harness plugged into the TCM and the negative lead to a known good ground. The duty cycle shold be the same as being commanded by the TCM in the advanced scan tool reading. If the cycle stays at 0% or 100% or is intermittent, re-check connections and if all wiring / solenoid is OK, the TCM may be at fault.

Read more at: http://www.obd-codes.com/p0741
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May 16, 2015 | Cars & Trucks

4 Answers

Already replaced new battery, new alternator, fuse, and pt connector - voltage sits at 12.9 running - system still not charging?


It isn't a good idea to disconnect the battery while it is running as the resulting voltage surge can damage electronics. Obviously if it isn't charging there won't be much of a surge...

Some alternators are mounted in rubber to cut noise and vibration. This type needs a ground wire which is sometimes forgotten during replacement and sometimes the ground wire just breaks.

A standard alternator only needs two or three wires and sometimes a ground wire. If the direct connection to the battery is good, the ignition light wire intact and working and if needed a battery sensing wire (though this wire isn't often needed in the last couple of decades) the alternator, if it is any good, will charge the battery at the regulated voltage of about 14.5.
If you are sure the alternator is a good one and it isn't charging the connecting wires must be at fault and need to be checked.

There is one other possibility and that applies only in the case of smart charging systems. If your car has a smart charging system the alternator will have several extra wires, usually plugged into the side of the machine.
The alternator works in a similar way to the standard unit except instruction from a separate control unit is capable of reducing or suspending charging. The smart charge black box talks with the engine management black box and charging is suspended during acceleration to cut fuel consumption or improve acceleration. A fault in the smart charge system can prevent the alternator charging.

Disconnecting the additional wiring will allow the alternator to perform its normal function without interruption. The ignition, charge or battery light is controlled by the black box and can do strange things that mean nothing when the smart charge is disconnected.

May 03, 2015 | 2002 Ford Escape

1 Answer

Negative battery terminal


normally there is only one earth wire on a battery as all units earth through this wire to the negative terminal. I would not bother trying to reconnect the cut wires as this will lead to problems further on. Go to a wrecker that handles you model vehicle and get the positive terminal wiring loom and replace all the cut wires . Leave the negative terminal off while you are doing this.

May 03, 2014 | 2000 Ford Focus

2 Answers

This is gonna take a bit.95 dakota 3.9 2wd.been having intermittent issues when the turn signals are on the radio cuts out and also intermittent no start/turnover issues,yesterday the no start reared its...


This would take a lot of work. The problem is likely on your wiring. Check for loose wires or bad wiring that needs to be replaced. Check it from the dashboard, center console and steering column to the engine bay. The items you mentioned has most of their wiring found in one harness.

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Battery positive lead shorted out on battery strap caulsing small electrical fire and smoking a couple of ground wires on my 2003 toyota tacoma. starting on ground lead off terminal and grounding to...


What is your question?Seems you are are the right track to repairng the fried wires. Even if you do not get them exactly right right just make sure everything is grounded. The engine and battery need grounded tot he frame/firewall.

Mar 05, 2010 | 2003 Toyota Tacoma

1 Answer

Wiring diagram


So, pretty much you have everything plugged in except the grounding. Ground is shared throughout the entire body. The thick black cable from the battery can be connected to the engine block. usually there is a threaded stand off somewhere on the side of the engine. You also need a smaller ground cable connected from the battery to the right front fender. There should be a ground strap that goes from the cylinder head to the firewall and two or three ground wires connecting the computer to the left fender.
I generally compliment the system by using a ten gauge or larger wire and run it from the battery ground terminal to the right fender (not cutting the wire but removing insulation, forming a loop, using a short self tapping screw and washer, then connecting it to the firewall at both corners, then up to the computer grounds, then to the cross brace on the radiator then to the engine block. (all connections made as the first so the wire remains as a continuous run...one exception being that the corner at the firewall gets another wire attached with an end loop running through the firewall and attached to the lower rail of the dash frame.) Reason? poor grounding is the primary reason many electronic components fail, and one of the most neglected areas of the entire system.
Doing what I outlined ensures that there is always a good alternative ground path that is largely unaffected by corrosion at fender connections etc,
Set your system up as I said at the start but consider going further later. I'd also consider using a heavier gauge positive lead than the stock one which is pathetically thin (I use 00 welding cable for that but you don't need to go that far, but the thicker the wire the less the resistance)
Good luck

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3 Answers

Check engine light for a 1995 pontiac sunfire


OBD 1.5 OBD 1.5 refers to a partial implementation of OBD-II which General Motors used on some vehicles in 1994 and 1995 (GM did not use the term OBD 1.5 in the documentation for these vehicles - they simply have an OBD and an OBD-II section in the service manual.)
For example, the 94-95 Corvettes have one post-catalyst oxygen sensor (although they have two catalytic converters), and have a subset of the OBD-II codes implemented. For a 1994 Corvette the implemented OBD-II codes are P0116-P0118, P0131-P0135, P0151-P0155, P0158, P0160-P0161, P0171-P0175, P0420, P1114-P1115, P1133, P1153 and P1158.[1]
This hybrid system was present on the GM H-body cars in 94-95, W-body cars (Buick Regal, Chevrolet Lumina ('95 only), Chevrolet Monte Carlo ('95 only), Pontiac Grand Prix, Oldsmobile Cutlass Supreme) in 94-95, L-body (Chevrolet Beretta/Corsica) in 94-95, Y-body (Chevrolet Corvette) in 94-95, on the F-body (Chevrolet Camaro and Pontiac Firebird) in 95 and on the J-Body (Chevrolet Cavalier and Pontiac Sunfire) and N-Body (Buick Skylark, Oldsmobile Achieva, Pontiac Grand Am) in 95.
Depending on the year and the vehicle, a car with the OBD 1.5 system may have either the older OBD-I connector, or the newer OBD-II connector, but they are electrically identical to each other.[citation needed]
The pinout for the ALDL connection on these cars is as follows:
180px-obd-connector-pinout.png magnify-clip.pngFemale OBD connector pinout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 For ALDL connections, pin 9 is the data stream, pins 4 and 5 are ground and pin 16 is battery voltage.
Additional vehicle-specific diagnostic and control circuits are also available on this connector. For instance, on the Corvette there are interfaces for the Class 2 serial data stream from the PCM, the CCM diagnostic terminal, the radio data stream, the airbag system, the selective ride control system, the low tire pressure warning system and the passive keyless entry system.[2]
An OBD1.5 has also been used on Mitsubishi cars of '95 '97 vintage.
An OBD1.5 has been used in some 1995 Volkswagen VR6's (Juice Box's GTI)

Aug 07, 2008 | 1995 Pontiac Sunfire

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