Low/High Beam Question

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Discussion Starter · #1 · Aug 30, 2018

I have a 4th Gen Avalon (2013) with HID low beams. When I flash my high beams at any time, the low beams come on briefly. Being HID headlamps, this isn’t the best for the bulbs/ballasts in terms of lifespan. Does anybody know enough about the headlamp relays to share how I might modify the wiring and disable the low beams turning on when I “flash to pass” the high beams?

On any older car, one could simply cut the extra wire going to the low beams. However on this model Avalon, there is only one pair of wires leading to the ballast/bulb. This means the low beam is getting power during the “high beam flash” at a different location on the wiring.

Can anybody help with this? Or perhaps shed some light on the wiring diagram so I can figure it out?

2008 Toyota Camry Base / CE

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2008 Camry

Off: Off

Auto: High Beam on low power (may cause LED flicker), auto-on Low Beam (may cause only one side to turn on)

Parking Lights (side markers): Side Marker’s and Tail Lights

Low Beam: Low Beam on

High Beam ON: Low Beam and High Beam on

High Beam TOGGLE: Low Beam and High Beam on

Fog Light (separate circuit): Always on (with ability to turn off)

Low Beam: Morimoto 5500K HID

High Beam: Morimoto 2stroke LED

Fog Light: Morimoto XB LED Projector Foglight

Normal is normal, it won’t hurt the HID’s because they should be designed for that. If you bought cheap ones, then I can see them eventually malfunctioning but a good set will work great. Don’t make anything harder for yourself.

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Can anybody help with this? Or perhaps shed some light on the wiring diagram so I can figure it out?

Wow, someone else who uses ‘flash to pass’. Whether it’s headlights or left turn signal to tell someone you want through, using lights to communicate is becoming a lost art. Common at one time were ‘fast flash to warn of a cop ahead’ or low beam slow flash to let someone know they’ve forgotten to turn their lights on. Then there’s ‘wig wag your signals’ to let someone know their turn signal has been on the past five miles

Anyway, here’s a link to a great site for wiring diagrams. You’ll have to provide some info first but I’ve never been spammed by them. Once logged in, navigate to your vehicle then to the system you need a diagram for.

Cheers!

2008 Toyota Camry Base / CE

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Wow, someone else who uses ‘flash to pass’. Whether it’s headlights or left turn signal to tell someone you want through, using lights to communicate is becoming a lost art. Common at one time were ‘fast flash to warn of a cop ahead’ or low beam slow flash to let someone know they’ve forgotten to turn their lights on. Then there’s ‘wig wag your signals’ to let someone know their turn signal has been on the past five miles

Anyway, here’s a link to a great site for wiring diagrams. You’ll have to provide some info first but I’ve never been spammed by them. Once logged in, navigate to your vehicle then to the system you need a diagram for.

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Cheers!

I’ve never learned or seen anyone use “flash to pass” and typically if I were to see it, I would think you are an > and just not do anything. Otherwise the only times I would use my high beams would be when it is complete darkness in the middle of nowhere or when I leave them on when I see a person driving at night with no tail lights on (because I can’t see the front) and being a > about it.

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Discussion Starter · #5 · Aug 30, 2018

Can anybody help with this? Or perhaps shed some light on the wiring diagram so I can figure it out?

Wow, someone else who uses ‘flash to pass’. Whether it’s headlights or left turn signal to tell someone you want through, using lights to communicate is becoming a lost art. Common at one time were ‘fast flash to warn of a cop ahead’ or low beam slow flash to let someone know they’ve forgotten to turn their lights on. Then there’s ‘wig wag your signals’ to let someone know their turn signal has been on the past five miles <img src=”http://www.toyotanation.com/forum/images/smilies/wink.gif” border=”0″ alt=”” title=”Wink” class=”inlineimg” />

Anyway, here’s a link to a great site for wiring diagrams. You’ll have to provide some info first but I’ve never been spammed by them. Once logged in, navigate to your vehicle then to the system you need a diagram for.

Cheers!

Wow, a celebrity! Your website is my Bible haha. I’ve already done the active reflectors, footwell mood lighting, hood and trunk lighting (brilliant call on that pin switch idea), led interior lamps/reverse lamps/switchback turn signals. Great stuff! I only have to buy whiter low beam bulbs and finish my full Focal audio build ?

I am waiting on a response email from that site you linked; I really hope there is an easy mod for this. I don’t want my low beams drawing all that power to turn on when all I want to do is give a few flashes to a car to signal that I’m letting them merge, etc. I just have to find out where the High Beam power wire intersects with the low beams and disconnect that. I’m sure it’s in a very unreasonable spot which is impossible to get to ?

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Discussion Starter · #6 · Aug 30, 2018

Vangm25, you never flash your high beams to signal? Signaling a guy coming the other way that his high beams are still on, flashing to let somebody know you are letting them merge in front of you, etc?

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I’ve never learned or seen anyone use “flash to pass” and typically if I were to see it, I would think you are an > and just not do anything.

Probably why, as I said, it’s becoming a lost art (at least in the U.S.).

There was a time when using lights to signal was common. While the courtesies weren’t necessarily part of a driving test, they were handed down from instructor (usually parent) to child as one more skill like always signaling for turns/lane changes. Nobody thought another driver was being rude, just trying to give a heads up.

Cheers!

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flashing to let somebody know you are letting them merge in front of you, etc?

Truck drivers really like that one and I like their running light ‘thank you’ responses.

Cheers!

2008 Toyota Camry Base / CE

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Vangm25, you never flash your high beams to signal? Signaling a guy coming the other way that his high beams are still on, flashing to let somebody know you are letting them merge in front of you, etc?

No one ever flashed me nor was I taught it. When people with drive with their high beams on, I don’t “flash” rather I just turn my own til they are out of my view (does not happen often). If people do flash me (or attempt to just blind me), it’s probably because my HIDs are bright (this only happen twice since I adjusted my lights and got a different set of bulbs). I’ve not flashed (or have not noticed the flashes) people merging. I either speed up to merge or I slow down to let them merge. At most, the only flashes I’ve noticed are from semi-trucks when I let them merge in to my lane and they flash their blinkers.

With how I drive, I drive with a sense of urgency but I am not the type to cut in between traffic. I prefer to wait til I see roughly 4 empty car spaces before merging (unless it is urgent). When I want to merge from the far left to the far right, I merge middle, I wait, I merge right (unless it is a emergency). When I turn, I turn then I make the full turn and I use my blinkers for nearly every turn I make. While I may not be the type to use flashes, I at least follow those other rules that people don’t do.

2008 Toyota Camry Base / CE

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Probably why, as I said, it’s becoming a lost art (at least in the U.S.).

There was a time when using lights to signal was common. While the courtesies weren’t necessarily part of a driving test, they were handed down from instructor (usually parent) to child as one more skill like always signaling for turns/lane changes. Nobody thought another driver was being rude, just trying to give a heads up.

Cheers!

Unfortunately the last time I heard of someone flashing another car (student driver), they got shot at or they shot at and someone was killed I think. Las Vegas I think was where it happen.

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Discussion Starter · #11 · Aug 30, 2018

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flashing to let somebody know you are letting them merge in front of you, etc?

Truck drivers really like that one and I like their running light ‘thank you’ responses.

Cheers!

I used to own an Altima and I moded the LED reverse lights with a push button switch to let me flash my reverse lamps to give a quick “Thank you” when somebody let’s me turn in front of them!

Can you make sense of this part of the diagram? I think this is what links the low beam power to high beams.

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Can you make sense of this part of the diagram? I think this is what links the low beam power to high beams.

Yep, the good news is everything you need is in the push/pull section of the headlight switch. The bad news is you’d probably be dealing with contacts and a circuit board. Just a guess you’d have to probe which traces on the board have power when the lever is pulled back then figure out which is for low beams and then whether you could cut the trace without affecting normal operation. IMHO it’s hardly worth the effort (and expense if you break something) for the rarely used benefit.

Cheers!

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Discussion Starter · #13 · Aug 30, 2018

Can you make sense of this part of the diagram? I think this is what links the low beam power to high beams.

Yep, the good news is everything you need is in the push/pull section of the headlight switch. The bad news is you’d probably be dealing with contacts and a circuit board. Just a guess you’d have to probe which traces on the board have power when the lever is pulled back then figure out which is for low beams and then whether you could cut the trace without affecting normal operation. IMHO it’s hardly worth the effort (and expense if you break something) for the rarely used benefit.

Cheers!

Thanks! Are you saying this switch/board is located inside or close to the stalk? I don’t mind probing around on a circuit board, I just want to figure out where it is.

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Thanks! Are you saying this switch/board is located inside or close to the stalk?

Yes, the stalk should be part of the switch assembly. I’ve never had it apart but typically you’d remove the plastic trim around the steering column which reveals the switch. Screws will hold the switch to the column and there will be an electrical connector. Once you’ve removed the switch you should (unless it’s a sealed unit) be able to poke around to see what has continuity when the lever is pulled back.

Before you begin, Google 2014 (or whatever year your car is) ‘Avalon Turn Signal Switch’. The first result will probably be an auto supply store. Autozone shows a bunch of different switches labeled depending whether the car has fog lights or DRLs or whatever. Try blowing up the appropriate photo to see what you’ll be dealing with. Just the price might dissuade you from any surgery you were planning

Cheers!

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I’ve never learned or seen anyone use “flash to pass” and typically if I were to see it, I would think you are an > and just not do anything. Otherwise the only times I would use my high beams would be when it is complete darkness in the middle of nowhere or when I leave them on when I see a person driving at night with no tail lights on (because I can’t see the front) and being a > about it.

Drive in Germany and you’ll have a sunburn on the back of your neck.

2008 Toyota Camry Base / CE

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Drive in Germany and you’ll have a sunburn on the back of your neck.

Probably but I live in Wisconsin.

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