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Acura TL Electrical System Problems



  • I solved my high-mount brake light problem, The solution was to replace the brake light switch, which is located on the brake pedal. The switch was less than $7.00, which I purchased thru Rock Auto. The switch is made by Airtex, part number is 1S5785. It was very easy to install - total was about 10 minutes. Bottom line - the switch went bad. (P.S. Acura dealer wanted $109 to trouble shoot the problem and this fee would not be applied towards the actual fix.)
  • On the dashbord yellow light DSL is on all the time, but no light on the balbs.
    Check the fuses all OK, balbs are OK. Normaly after i release the parking brake, the light came on and the sign DSL came off. Now the DSL is on all the time and no any light on the balbs.
    Please, if any body know what is that or had similar experience, please lets me know. Thanks.
  • Hi... my 99 TL goes in driving gear but not reverse i dont know whats wrong with it. it also make a rattling noise that come from the engine everytime i put the car in parked or reverse :( :( :(
  • Hi was wondering if anyone else has run into this problem. I have a 2007 TL base and the dealership has indicated that with the standard battery drain (I think a .4) when the car is parked that you may have a problem starting your car if it is parked more than about 4 days. He indicated that the spec'd out battery Acura has only has so much capacity. This seems ridiculous as when my wife and I go on trips the car can sit at the airport for 7-10 days. So we have to take the other car a 2008 Chrysler that does start without issue.
    I asked about them about replacing the battery with a larger capacity battery and they said they have to use the battery that Acura specifies which makes sense but the entire thing seems dumb.
  • I have an '08 TL that I have left parked in the garage for over a week at a time without a problem starting yet. I am aware if you have the navigation system (which mine does) that there may be a problem with the navigation system that would not turn off when you turned off the car and caused the battery to drain. I am concerned that at some point my TL will not start after reading all the complaints on the forums so I bought one of those self contained battery booster jumpers you can get at Sears and keep it charged and in the trunk. Others in the forum have also reported their battery drains on TLs that do not have navigation so there must be other issues with the electronics in the car that cause the battery to drain. It seems from reading in the forums that once you get the problem with the battery draining if it did not occur before, the problem could not be fixed and the battery would always drain down. Not sure that a larger capacity battery would resolve the problem, only prolong the time it takes for the battery to drain as the source of the problem is still there and need to be fixed. Acura needs to fix the root cause of the battery draining. This is a well known issue all the Acura dealers know about.
  • Thanks Trailhiker. My car doesn't have the Nav. The dealer did find that the blue tooth hands free was coming on by itself when the car was parked which caused a big spike against the battery. They did replace the unit but the problem has not gone away. They have blamed the after market remote starter I have that they claim is also putting a drain on the battery. So now I have had that disconnected. It's very frustrating I think something else is going on. But honestly I think the biggest issue is the standard battery doesn't have enough capacity to allow the car to be parked for days yet still start. I am curious what your climate is like, I am in Nebraska so we get a lot of cold weather and snow. The cold weather also zaps the battery. I do have three other cars (wife and 2 kids) all have remote starters along with different degrees of computer systems in their cars and their cars can easily sit for a week in cold weather and start without any problem. The dealer suggested that when I go to the airport on trips that I disconnect the negative battery terminal. I pretty much said "You've got to be kidding". Anyway maybe it's just a quirk with my 07 TL. Anyone else that has had similar experiences would like to hear from you.
  • I am in Dallas. I had the car parked in the garage for a week at Christmas time when we had below freezing temperatures for almost a week and some snow and had no problem starting the TL after a week. Also the summers are hot, over 100 quite often so there are temperature extremes from hot to cold. I still have the original battery, bought the car in February 2008. I have asked my Acura service advisor about the battery problem and the response was the navigation system can cause this and also because of the electronics in the car, the battery does not last as long. He also advised me that the electronics are all somehow interconnected to each other so it is hard to determine what other electronic component may be causing the battery to drain. I dont accept the answer that the battery does not last as long because of the electronics as I have had Fords with just as much electronics and did not have this problem. Acura service runs a battery check every time I take by for oil changes, etc to check if the battery capacity is low. I know this will start happening to me one day so that is why I bought that battery jump starter at Sears (around $50) and keep it in the trunk. Something else that could be done (I do this with my tractor that I dont start for several months), I bought a trickle charger and connected it to the battery and put a quick disconnect in the wire so it is easy to disconnect as without keeping the trickle charger on it, the battery goes dead in a year or two and will not hold a charge. I am very interested if you do find the root cause of the battery drain.
  • My rear driver window open by it self when I start my car so I have to drive with it open. The only way to close it is while the car is running and in park i have to open the driver door, then push the pull up on the button on the rear window, turn the car off, then close the doors. I think it has someting to do with the swithc located on the body that the door hits was it is closed. I check the fuses and some are missing and some are not even the correct amp indictated in the manual or fuse cover. The alram will also go off for no reason when parked. Any help or suggestions.
  • Thanks Trailhiker for all the information and ideas. I appreciate it! I will let you know if I ever get to the bottom of this one.
  • In the past year I have had 3 times where the car would not start. In each instance everything lights up on the dash but the engine does not turnover. I have jump started the car and it started and then had no further problems.

    The first time it happened I had left the radio on in the garage for an extended period. The second time it was only for less than 10 minutes and this last time I was hooking up a Bluetooth phone device in less than 5 minutes. This last time there was a starnge clicking sound and I knew something was wrong and then it wouldn't start.
  • brianjrbrianjr Posts: 1
    edited March 2010
    My headlights (low beams) intermittently go out on my 1999 Acura TL 3.2. Often one or the other, sometimes both. Occasionally, both go out when the turn signal is also in use or just deactivated. Usually turning the lights off/on one or several times makes both turn back on. Rarely (twice), I have had to pull over at night because they both went out and wouldn't turn immediately back on.
    There is no condensation and the HID bulbs were in place for six months before intermittent outages. High beams work fine, even when one low beam is out.
    I appreciate your thoughts.
  • newmarknewmark Posts: 2
    I live in the Bahamas and have a 1996 Acura 3.2 TL - purchased in Canada. The DRL is not working (which is fine by me) but the DRL on the dash board stays on. Can I stop this by removing a fuse?...Thanks...Robert
  • newmarknewmark Posts: 2
    Me again..The ABS system on my 1996 Acura 3.2 TL is not working (which is fine as I do not drive in bad conditions) but the light on the dashboard stays on while there any way to turn off this light...I would appreciate your advice. Newmark
  • bodble2bodble2 Posts: 4,519
    edited June 2010
    My '04 had a drained battery about 2 1/2 years ago. They installed some part behind the nav unit pursuant to a TSB. Then that winter, due to a series of snow storms, my TL was parked for about 2 months. The battery died. The dealer recommended a brand new battery. I regularly park my car for a week or so at a time, but just recently, with vacation and such, it was parked for about 5 weeks, and bingo, the battery died again.

    So it seems a week or so should be no problem, but anything over 1 month and I'll be on thin ice. I asked the BCAA guy who came to jump start it, if it is normal for a healthy battery to drain in a month, and he said it's possible due to all the electronic accessories and stuff in modern cars that will continue to drain the battery even after the ignition is shut off.

    Now I know I don't even need to crank the ignition to know that it's dead. The doors wouldn't unlock with the remote, and the alarm blinking LED on top of the door would be off.
  • jenbenjenben Posts: 1
    I have an 04 Acura TL. 70k miles. my battery is draining due to my navi, radio and clock display ALL STAYING ON even after i've turned off the car, taken the key out and locked the doors!! the other day, I noticed it was the radio that wasn't turning off, and I dismissed it, after turning the radio off manually... the following day, my battery was completely dead. After having my battery jumpstarted, everything seemed to be fine, but noticed that while as it should, the radio needed to code, but the navi didn't and was staying on as well as the clock dash......
    Any suggestions?
  • kymlkyml Posts: 1
    I had the same thing happen, My car is currently in the shop and they just called to tell me that it is the part the tells the Computer the cut the power from the Bluetooth and the Homelink and it draws ALOT of power and kills the battery. I have an 06 TL and have gone through 4 batteries. Thank GOD that someone took the time to find out the problem. Acura does know that they have this problem Call 1-800-382-2238 they can help with this problem.

    My 05 Acura TL battery was dying after 4 days of non-use. Also, when I selected the HFL on the computer, it continually said "Booting." When I felt the map light console at the very front left corner by the rear view mirror, it would get very hot. So, it seems that the HFL malfunction was the culprit for draining the battery.

    The replacement procedure can be found in this TSB:

    I pried the sunroof switch off using a small eyeglasses screwdriver, it was quite easy. Then, I reached into the hole on the rear of the car side and pulled down. To remove the HFL cover, you simply have to remove four bolts using a rachet.

    I disconnected the HFL plug. I believe this should fix the problem, since there will no longer be any power going to it. If not, the unit will likely have to be replaced. It can be found for around $399 online and should be an easy do it yourself.
  • As a follow up to my earlier post, disconnecting the power to the HFL has solved my battery drain problems with the TL. Best of all, I don't have to give another $800 to the dealer!

    If have this problem, but absolutely can't live without the HFL, it can be found for around $399 online and should be an easy do it yourself. The part number is
    77120-SEP-A01ZA. Below is a link where it can be purchased. Best of luck! catcgry2=2004&catcgry3=4DR+BASE+NAVIGATION&catcgry4=KA5AT&catcgry5=INSTRUMENT%2B- PANEL&ListAll=All&vinsrch=no
  • LT? no mine came that way I guess they reveresed when applying the emblem. Well anyways, I am having an issue with my 2007 Acura TL-NAVI. it suddenly shuts off the electrical when driving. My wife drives the car and at first did not beleive it! but then saw it myself we were doing 70 MPH and the instrument panel power cut off suddenly and she said the power steering is getting tighter. Pulled off the road as the engien was running turned off and started again without a hitch. She said she has experienced this at least 4 times over the past 3-4 weeks, Took it to the dealer and no luck as they could not duplicate or diagnose. Called Acura service and they said nothing reported similar to what we are experiencing. Now I am driving the car and see if it happens to me. Just wanted to know if there is anyone else out there who has experienced this issue?
  • moira1moira1 Posts: 3
    I had the exact same problem with mine - it would should off and sometimes start back up on it's own. My mechanic finally diagnosed it as the ignition switch, replaced it, and I haven't had any problem with it since. Good luck!
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