Oct 142018
 

2010 Chavy Impala

My automatic headlight won’t shut off.


This is common of a sticking relay. You will want to look for the DRL Relay. DRL = Daytime Running Lights.

DRL Relay Location

The DRL Relay is located in the underhood fuse block on the right side of the engine compartment. Look under the lid of the fuse block for exact location diagram.

Daytime Running Lamps (DRL)/Automatic Headlamp System

Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. Fully functional daytime running lamps are required on all vehicles first sold in Canada.

The DRL system makes the low-beam headlamps come on at a reduced brightness when the following conditions are met:

  • The ignition is in the ON/RUN position.
  • The exterior lamps control is in AUTO.
  • The engine is running.

When the DRL are on, the regular headlamps, taillamps, sidemarker, and other lamps will not be on. The instrument panel and cluster will also not be lit.

The headlamps automatically change from DRL to the regular headlamps depending on the darkness of the surroundings. The other lamps that come on with the headlamps will also come on.

When it is bright enough outside, the headlamps will go off and the DRL will come on.

The regular headlamp system should be turned on when needed.

Do not cover the light sensor on top of the instrument panel because it operates the DRL.

Oct 102018
 

1999 Dodge Durango

Only starts in neutral , no backup lights! neutral / safety switch bad? thanks in advance!


That would be my first thought, being the neutral switch. Or the gear shift cable is just out of adjustment.

Transmission Park/Neutral Switch

The park/neutral switch is located on the transmission housing and provides an input to the powertrain control module (PCM) This will indicate that the automatic transmission is in Park, Neutral or a drive gear selection. This input is used to determine idle speed (varying with gear selection), fuel injector pulse width, ignition timing advance and vehicle speed control operation.

Gearshift Cable

Check adjustment by starting the engine in Park and Neutral. Adjustment is OK if the engine starts only in these positions. Adjustment is incorrect if the engine starts in one but not both positions. If the engine starts in any position other than Park or Neutral, or if the engine will not start at all, the park/neutral position switch may be faulty.

Gearshift Adjustment Procedure

  1. Shift transmission into Park.
  2. Release cable adjuster lock (underneath the power brake booster) to unlock cable.
  3. Raise vehicle.
  4. Slide cable eyelet off transmission shift lever.
  5. Verify transmission shift lever is in Park detent by moving lever fully rearward. Last rearward detent is Park position.
  6. Verify positive engagement of transmission park lock by attempting to rotate propeller shaft. Shaft will not rotate when park lock is engaged.
  7. Slide cable eyelet onto transmission shift lever.
  8. Lower vehicle and check engine starting. Engine should start only in Park and Neutral.
  9. Lock shift cable by pressing cable adjuster clamp down until it snaps into place
Oct 082018
 

I need a standard trailer wiring diagram for a auto trailer. The supply side has a 5 position plug. 1ground, 4 colored supply wires, trailer has two tail lights with brake light capability. I misplaced my instructions. Need help identifying colors of trailer connections.


The 5 wire  diagram shows the addition of a wire for use on electric brakes or back up lights. Where as on the 4 wire diagram does not. Use the provided wiring diagrams below to assist you in your installation.

4 wire trailer wiring diagram

trailer wiring diagram

5 wire trailer wiring diagram

5 wire trailer wiring diagram

Towing Package Factory Wiring Harness

The trailer tow preparation wiring harness is connected to the body wire harness. It is located at the right and left outer rear lamp unit connections. After installation is complete, a trailer tow stop/turn relay is secured to the harness behind the rear bumper fascia just below each outer rear lamp unit. A trailer tow stop lamp relay is located on the underside of each outboard end of the rear bumper reinforcement behind the rear fascia. The four-way trailer tow connector is located near the center of the rear fascia.

Trailer/Towing wiring diagram – 2009 Dodge Journey

(Best Viewed in Google Chrome Browser)
2009-dodge-journey-color-schematics-exterior-lights-trailer-tow-circuit-1-of-1-

Oct 032018
 

2003 Ford Thunderbird

What is the body code B2340?


Found no listing in the Repair Manuals for code B2340. Searched around and came across the following.

B2340 – Column Reach Motor Stalled

Source: Engine-codes.com, troublecodes.net/bcodes/

———————————————–

B2340 Ford Husky DTC Meaning

B Body Code – Problem is antilock brake system, electronic suspension and steering systems.
2 MFG – Manufacturer Specific
3 IC Module 4X Ref Circuit Intermittent, No Pulses
4 Control Module Throttle Actuator Position Performance
0 Transmission Engaged At High Throttle Angle

Source: http://enginedtc.com/b2340-ford-thunderbird

Oct 022018
 

2004 Jeep Grand Cherokee

Windows, Locks, 1 Mirror problem. Front Driver door controls, lock switch only locks/unlocks front driver’s door. Window switches only open/close driver’s side front & rear windows. Front Passenger door switches do NOT lock/unlock doors or open/close windows. Rear driver’s door window switch works. Rear Passenger door window switch does NOT open/close the window. Keyless entry remotes do NOT work (Batteries are good) Interior lights come on with all door except the front passenger side. Driver’s mirror does adjust, Passenger mirror does NOT adjust. All wires running into the front doors have passed a continuity test. I’m leaning towards the Front Passenger side door module. What do you think?


I have found over the years that the wiring harness in the door jam becomes damaged easily. This is more common than you might think on older vehicles. Not the rule but worth checking. It is quite possible that the door module may be faulty or both.

Sep 172018
 

1993 Honda Accord

What would make my 1993 Honda Accord spark plug smell like diesel fuel?


Contaminated fuel. This is more common than you would expect. The same delivery trucks are sometimes used to transport different grades of fuel. Under normal operating procedures the tanks are flushed after each haul. This helps prevent contamination of diesel and regular grade fuels. When this step gets over looked there can be upwards of a 100 gallons being mixed in the next load.

When your fuel is contaminated the engine may struggle and have performance issues. The engine may “PING” on heavy acceleration. Though in the short term no damage should occur but if not corrected severe internal engine damage will. Feel free to drive that tank out and fill up at a different fueling station the go around. For large fuel tanks an Octane boost may be used to prevent engine ping.

Sep 132018
 

Nissan Altima

I need to repair the blend or mode motor and door assembly. I can’t get defrost or floor vent to open. The air conditioning only blows at me. How do I reach the blend door assembly?


You will need to remove the instrument cluster from the dash panel(see video). Then you will need to remove the BCM that is located behind the instrument cluster.

Mode Door Motor Replacement

Mode Door Motor Removal

    1. Remove the Instrument Cluster.

  1. Remove the BCM.
  2. Disconnect the mode door motor connector (1).
  3. Remove the mode door motor screws (A) and then remove the mode door motor.

2011-nissan-altima-mode-door-motor-location-diagram

Mode Door Motor Installation

  • Installation is in the reverse order of removal.

 

2005 Chrysler Town and Country Code P0420

 Auto Repair Questions, Chrysler  Comments Off on 2005 Chrysler Town and Country Code P0420
Sep 082018
 

Chrysler Town and Country

Engine light stays on. Mechanic’s scope indicated a code and changed the Catalytic Converter and one Oxygen Sensor. Shortly after the engine light came on again. He changed the second Oxygen Sensor. Light came on again Both times he used his meter, the code said the problem was with the Sensor. Any suggestions for what I should check next? Could the problem be electrical (a short or faulty wire harness)?


I am guessing as to what the actual code is as you did not provide it. If the code is different please indicate it by responding in the comments.

Chrysler Code P0420

Description: Catalyst System Efficiency Below Threshold Bank 1

Probable Causes:

  1. Sensor or solenoid faulty
  2. Connector terminal contact is damaged or corroded
  3. Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
  4. Update control unit software – Check for the latest control unit update
  5. Powertrain or Engine Control Module faulty
  6. HO2S sensor contamination/damaged
  7. Exhaust leaks or restrictions
  8. Catalytic converter damage
  9. Catalytic converter improper operation