Jan 252018
 

Buick Enclave

I need a bulb put in the right front head light I was told. Will replacing this bulb, also work low and high beam? I was also told it is a little difficult to replace this bulb. Can you tell me how much the bulb should be and how much should the total cost to replace this bulb?


Replace headlight bulb

High beam and low beam headlight bulbs are separate. Labor time is 0.8 – 1 hour to replace headlight bulb. So you are looking at around $200 for parts, labor and tax.

OEM Factory Replacement HID Bulb – $69.00 w/free shipping

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Technical Info

The headlamp relay receives battery positive voltage directly from the battery. The BCM supplies a ground signal to the headlamp relay for normal headlight operation. The BCM also supplies voltage to the beam select relay coil for high beam headlight operation. When the driver places the headlamp switch in the ON position and the dimmer switch is in the low beam position, the headlamp relay supplies current flow through the left and right low beam headlamp fuses to both low and high beam headlamps. Both low beam headlights are grounded through the beam select relay. When activated, the dimmer switch sends a ground signal to the BCM in the high beam position and a momentary ground signal in the flash-to-pass (FTP) position. The BCM then energizes the beam select relay which switches the headlamp grounds from the low beam headlight bulbs to the high beam headlight bulbs illuminating the high beam headlights. With the headlights in the low beam position, the high beams may be momentarily turned ON or flashed by activating the FTP portion of the switch.

When To Change The HID Bulb

Bulb failure, end of life occurs when the bulb gets old and becomes unstable. The bulb may begin shutting itself off sporadically and unpredictably at first, perhaps only once during a 24-hour period. When the bulb begins shutting itself off occasionally, the ballast will automatically turn the bulb back on again within 0.5 seconds. The ballast will re-strike the bulb so quickly that the bulb may not appear to have shut off. As the bulb ages, the bulb may begin to shut off more frequently, eventually over 30 times per minute. When the bulb begins to shut off more frequently, the ballast receives excessive, repetitive current input . Repetitive and excessive restarts or re-strikes, without time for the ballast to cool down, will permanently damage the ballast. As a safeguard, when repetitive re-strikes are detected, the ballast will not attempt to re-strike the lamp. The ballast then shuts down and the bulb goes out.

The following symptoms are noticeable signs of bulb failure:

  • Flickering light, caused in the early stages of bulb failure.
  • Lights go out, caused when the ballast detects excessive, repetitive bulb re-strike.
  • Color change—The lamp may change to a dim pink glow.

Input power to the ballast must be terminated in order to reset the ballast’s fault circuitry. In order to terminate the input power to the ballast, turn the lights off and back on again. Turning the lights off and back on again resets all of the fault circuitry within the ballast until the next occurrence of excessive, repetitive bulb re-strikes. When excessive, repetitive bulb re-strikes occur, replace the starter/arc tube assembly. The ballast will begin the start-up process when the starter/arc tube assembly is replaced. Repeatedly resetting the input power can overheat the internal components and cause permanent damage to the ballast. Allow a few minutes of cool-down time in between reset attempts.

Bulb failures are often sporadic at first, and difficult to repeat. Technicians can identify bulb failure by observing if the problem gets progressively worse over the next 100 hours of operation.

Light Color

White light has a different color rating than regular headlamps. The range of white light that is acceptable is broad when compared to halogens. Therefore, some variation in headlight coloring between the right and left headlamp will be normal. One high intensity discharge (HID) at the end of the normal range may appear considerably different in color from one at the other end of the range. Difference in color is normal. Replace the arc tube only if the arc tube is determined to be at the bulb failure stage.

Jan 052018
 

2000 Buick Lesabre

My right turn signal does not work. Nothing comes on for the right. Dash turn signal light or right cornering light do not work. But, the emergency flashers do work. Please advise. The car has a multi function unit on the steering wheel. So, I assume the turn signal switch is contained in that unit. It is a 2000 Buick Lesabre Limited 3.8.


You are correct in your thinking. The turn signal switch and multi-function switch are one in the same. So you know the wiring and bulbs are good because the hazards work. The most common cause for this issue is a faulty multi-function switch. Therefore I recommend replacing the switch.

Multi-function turn signal switch replacement

(best viewed in Google Chrome Browser)
2000-buick-lesabre-multifunction-turn-signal-lever-replacement-on-vehicle

Nov 252017
 

Buick Century

What would make my car stall all of a sudden while I’m driving at 40mph. And now it will not start or even crank the engine over. It has gas, lights come on. Please if you can point me in the right direction.


Will not start but lights come on

Quick answer would be the BATTERY and or Alternator.

If the alternator quits working the engines computer and engine runs completely off the battery. This could be from a failed alternator, alternator connections or a broken serpentine belt. The engine continues to run off the battery until the voltage drops below the computers threshold then causes the engine to die. At this point the battery is too weak to crank over the engine.Generally if this is the case the BATTERY light comes on.

The battery does still have enough juice left to operate the lights and radio. The lights draw about 15 amps, the radio draws about 5 amps to function. The starter draws up to 250 amps to operate.

Oct 182017
 

Buick Century

The wiring harness was cut in a wreck. I have connected all but three solid black and three solid grey wires. They are identical. Which do I connect to which? Or does it matter? They say they go to the throttle sensor and neutral switch. Please help!!


PCM Wiring Harness Issue

You will need to identify which wire is connected to each terminal coming from the PCM. You can do this with a multi-meter by checking the continuity from the pin connector at the PCM. Then using a wiring diagram correlate the PCM connector pin with each wire and this will let you know where the wire is supposed to go.

PCM Wiring Diagram (best viewed in Chrome or Firefox)

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Oct 112017
 

2004 Buick Rainer

I can’t get the A/C or Heat to come out the front vents. The vents are open, it will work on windshield, floor, and back vents. I have checked the fuses and none are blown. What do u advise? If not to complicated I would like to do it myself. Also what part would I need and what would that be called?
Thank You,
Velda


This sounds to me like a failed mode door actuator. Its failure is so common that Dorman has come up with a better direct replacement version.
Part you will need: Dorman 604-110 Air Door Mode Actuator

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Mode Actuator Replacement

Removal Procedure

  • Remove the left side sound insulator screws.
  • Remove the left hand floor duct.

Mode Actuator 2004 Buick Rainer

  • Disconnect the electrical connector from the mode door actuator.
  • Remove the screws from the mode actuator (1).
  • Remove the mode door actuator.

Installation Procedure

Important The new actuator is in Bi-Level mode. Place the door in the middle of the travel position before you install the actuator.

  • Install the mode actuator (1).
  • Install the screws to the mode door actuator (1).

Tighten
Tighten the screws to 1.9 N·m (18 lb in).

  • Install the left hand floor duct.
  • Install the left side sound insulator screws.
  • Recalibrate the mode actuator.
Aug 192017
 

 Buick Century

Idling very high as well very erratic

I am having a major issue with my 1996 Buick Century with 75k original miles and nobody seems to be able to figure out the problem. I replaced my fuel pump and I am in the process of replacing the radiator fan and motor. What I’m experiencing now is hesitation and acceleration coming from a complete stop. It feels almost as if there is some type of emission issue or a fuel issue. But it is idling very high as well very erratic if I put the air conditioner on too.  Has never lost power as of yet and check engine light is not on. I’ve had it hooked up to the computer and the mechanic said it’s not throwing any codes. He said that he hooked it up directly to the car and drove it and still no codes.

What could possibly be wrong with my car?

It seems to shift into first and second and third OK, nothing out of the ordinary. And sometimes the engine will rather but other than that I cannot come up with what is going on with this car. All my fluids are good. Transmission fluid good and color not gritty, doesn’t smell, oil’s good and doesn’t smell burnt. My temperature gauge has never raised to make me believe the engine is overheating but it’s just Driving really rough and feels as if it’s a gas issue or an emissions type of issue. Sometimes going from a stop it will hesitate like it doesn’t have enough gas to go. It’s almost like it feels from inside the car it feels like it’s falling apart. But on the outside of the car it doesn’t sound like it feels inside but it does idle loud. My car never idle that high before. It was not all that noise coming from under the hood I just know that I’m into this for $500 already and my car still not running properly just because it’s not throwing codes I don’t understand.


No codes is a good thing as it rules out most all sensors on the vehicle. However the I think I can help. The high idle is the big tip off for me. A higher than normal idle indicates a vacuum leak. A vacuum leak would cause everything you are experiencing and would NOT cause a code to be stored. The hesitation if from the engine sensors trying to compensate for the vacuum leak. The most common place for a vacuum leak on your specific engine would be the PCV valve hose.

How to locate a vacuum leak on an engine

Sometimes you are able to hear a slight whistle with the hood up and the engine running. Other times you may need to spray some non-flammable brake wash around suspected areas and listen for the engine rpms to change. Then dig deeper in the effected area of the engine.

Positive Crankcase Ventilation Valve Removal

pcv 1996 Buick Century diagram

  • Remove the vacuum hoses (1) from the fuel pressure regulator (3) and positive crankcase ventilation valve (2).
  • Remove the positive crankcase ventilation valve.
Jul 032017
 

2003 Buick Rendezvous

Windows stopped working

All four of my windows stopped working at the same time. We have checked the fuses and replaced the 30 amp circuit breaker and they still don’t work. Can you tell me what it might be and how to fix the problem?


Grab a multi-meter and dive into the wiring harness. Check your negative and positive. Might keep an eye out for a break in the wiring harness near or at the driver side door jam. This is a common place for the wiring to become damaged. Use the wiring diagram provided to assist in tracing down your issue.

Power windows wiring diagram 2003 Buick Rendezvous

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Jun 232017
 

1997 Buick Lesabre

Do fuel injected cars vapor lock?

After I have been driving my car for a while and I turn the car off, when I go to start my car again it wont start. It’s as if my car is vapor locking (but I didn’t think fuel injection cars can do that or can they?) It’s 114* outside..my temp gauge is normal, I have 3/4 tank of gas, my oil gauge is right below 40. I’m guessing either my fuel pump and or fuel filter.


We have created a wonderful no start diagnostic chart to help assist in such an occasion. You will need to determine what the engine is not getting when it is trying to start. A quick test would be to spray some starting fluid in the air filter to see if it tries to run. If it does, then you know it is fuel related for sure.

Vapor Lock

Yes fuel injected engines can vapor lock. It might not be as common as in the old days but non the less it can and does occur. Vapor lock is just air trapped inside the fuel system. Simply removing the gas cap would releive the situation if this is what is happening.