9th generation reverse lamps. - Chevy Impala Forums
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post #1 of (permalink) Old 01-11-2016 Thread Starter
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9th generation reverse lamps.

Hi new here just had a question about the reverse lamps on the 9th generation and L.E.D bulbs has anyone switched out the stock bulbs for l.e.d's and if so do they stay dimly lit when your lights are on? I switched mine with 3 different types of l.e.d's with the same result for some reason when my headlights are on my reverse lamps stay dimly lit. but during the day with the headlights off they are off unless I'm in reverse or unlock my doors they'll come on like normal.
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post #2 of (permalink) Old 01-12-2016
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Yes,

i had to bend the prongs over. on the bulb you have 4 little metal connectors wires? i unfolded one side and move it over the other side so it touches the other wire thing if that makes sense.
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post #3 of (permalink) Old 01-12-2016 Thread Starter
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Actually no can you be more specific please.
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post #4 of (permalink) Old 01-13-2016
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On the base of the bulb you see those things that look like "paper clips" Mine had them on both sides of the bulb, so when plugged in they stayed on because its drawing power from feed back or something i was told ( i dont do electrical) so i simply folded over the "paper clip" to the other side of the bulb. I cant remember now but i think those light should have one on each side. Ill look at my bulbs tonight.
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post #5 of (permalink) Old 01-15-2016 Thread Starter
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Ok i see what you are talking about now. So instead of having the two "paper clips" on one side. You bent it over so there are one on each side? Makes sense. So after all that you have not had any problems with it?
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post #6 of (permalink) Old 01-20-2016
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sorry got busy and for got to reply. Yes it works fine, but i didnt look to see which way they go, i just bent them over and tired it until it worked... sorry im no help.
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post #7 of (permalink) Old 01-21-2016 Thread Starter
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no that information actually helps Im going to try that once it gets warmer out i had them on before but like i said they were staying dimly lit at night.
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post #8 of (permalink) Old 04-27-2016
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Careful, your auto-dimming mirrors may stop working w/LED Backup bulbs!

FYI, I changed over to LED back-up light bulbs in my '14 LTZ 2 and didn't associate as the cause of the problem but after 2 trips to the dealer because my mirrors would no longer dim where they replaced the rear view mirror on the second service attempt and said they fixed it, the rear & drivers side mirrors still would not dim at night when exposed to bright light sources from behind.

I was about to break out my multi-meter and start probing the harness at the mirror, when I recalled I switched the back up bulbs to LED bulbs a few months earlier. Seeing that since LED bulbs don't have a filament, I then thought that the new LED bulbs might not be placing a sufficient load on the circuit. Sure enough, as soon as I put 1 of the regular incandescent back-up bulbs back into the back-up lamp socket, the rear view & driver side mirrors started dimming as they normally should.

Chalk that one up to experience!
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post #9 of (permalink) Old 04-27-2016
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post #10 of (permalink) Old 04-28-2016
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LED bulbs remaining dimly lit...

Yeah, not all LED bulbs are created equal!
The first set of LED bulbs I tried had that same problem as the earlier posting member of remaining very dimly lit when the car was completely powered off, but installing a 1.5K ohm resistor across the bulb leads squashed that problem.

The were two remains problems however:
1) with or without the resistor whenever I went into reverse, the image on the infotainment screen for the back-up camera had wavy static noise lines in it. Obviously the bulbs were cheaply designed/made (but not cheap in price) and the LED drivers were generating a ton of electrical noise in the back-up lamp circuit that then affected the power circuit for the back-up camera image (probably powered by the same line feeding the bulbs, but I don't have diagrams to confirm that)...
2) with 2 LED bulbs installed into the back-up lamp sockets, the auto-dimming of the rear view & driver side mirrors would no longer operate to trigger dimming...

My second set of LED back-up bulbs were better in quality in that they generate zero noise, so the back-up camera image is crystal clear, but as I posted above using 2 LED bulbs it resulted in the auto-dimming of the rear view & driver side mirrors to stop working. As mentioned above, using a load device like the above post would probably allow both LED bulbs to be used AND allow the auto-dimming rear & driver side mirrors to work. I might just install a 40~50 watt power/load resistor as that would simulate the load on the circuit of using the 2 incandescent back-up bulbs.
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post #11 of (permalink) Old 04-28-2016
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I have swapped out EVERY non-Led bulb in the car with the exception of the front turn signals (they are bright enough). I purchased ALL my bulbs from JDM Astar (either directly or through Amazon fulfillment). Have not had a single issue with any of them working or causing any issues except the rear tail lights that needed a load resistor to solve the hyper flashing. Check them out here :
https://www.jdmastar.com/index.php?r...k=1&mo=9&e=208
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post #12 of (permalink) Old 05-01-2016
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Hi ICUBB,
If you don't mind me asking which 7440 back-up bulbs did you go with?

Reason I ask if my first set of 7440's were JDM (also bought from Amazon) but had issue of remaining dimly lit (requiring 1.5 KOhm resistor AND caused noise on back-up camera screen on my '14 LTZ (LTZ LS2 option to be exact). So I'm looking to not repeat the issue, if possible! ��
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post #13 of (permalink) Old 05-01-2016
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Packaging is not marked with the model number only a description. As I have changed them all out I have quite a few packages, lol. I pretty sure these are the ones but I can confirm it tomorrow for you.

https://www.jdmastar.com/canbus-erro...k=1&mo=9&e=208
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post #14 of (permalink) Old 05-01-2016
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Thanks, I appreciate your checking the b/u LED bulb you're using - but do you have the auto-dimming rear view/driver side mirrors option on your 2015 2LT?
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post #15 of (permalink) Old 05-01-2016
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Actually I do not think I do as it is not listed on the original sticker. It does say auto dimming interior mirror but nothing about outside ones. Sorry if I was misleading you here.
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