Everything went fine with the install. I now have DRL, so I can now register my Truck in Canada. Thanks!
One thing. If I put the parking brake on and then turn on the truck the DRLs are still on. Did I wire something wrong or does this feature not work. Not concerned unless I have a loose wire somewhere or the job isn't grounded properly.
No you do not have any loose wires or problems with your installation. I intentionally did not address all the parking brake function in the design. While I could have, the complexity of the installation would have gone up significantly, requiring two more relays.
I felt leaving this out would not be a big issue for most people, and would keep the installation as simple as possible.
Glade you were able to get your installation done.
Thanks Frank!
Just installed DRL on CrewMax Ltd. Everything works. Only one thing causes problem. In auto mode it does not shut the parking lights off! Do you know if it is possible to fix it?
Would appriciate if you can help!
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2007 Toyota Tundra CrewMax Limited 5.7L 2WD, Timberland
Thanks Frank!
Just installed DRL on CrewMax Ltd. Everything works. Only one thing causes problem. In auto mode it does not shut the parking lights off! Do you know if it is possible to fix it?
Would appriciate if you can help!
Hmmmm, Not sure I am following you here, which isn’t a surprise given my old brain but…….
The DRL uses the turn signal bulbs.
When you say “The Parking Lights don’t go out when in auto mode”,
Do you mean The Parking Lights or do you mean the Turn Signal/DRL Lights?
Not having “auto lights” on my Tundra I can’t trouble shoot this too well, other then to review the electrical diagrams for auto lights. I will do this over breakfast today to see what if anything I can discover.
In the mean time, could you double check which lights are not going out while in auto mode.
Do you mean The Parking Lights or do you mean the Turn Signal/DRL Lights?
In the mean time, could you double check which lights are not going out while in auto mode.
Frank
Sorry Frank. My BAD!
I mean Turn Signals, but for some stupid reason was typing Parking lights.
DRL works fine, when I switch the lights on manually, turn signals go off. But in auto mode, when it gets dark, the lights come up but the turn signals stay on.
Thanks.
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2007 Toyota Tundra CrewMax Limited 5.7L 2WD, Timberland
Sorry Frank. My BAD!
I mean Turn Signals, but for some stupid reason was typing Parking lights.
DRL works fine, when I switch the lights on manually, turn signals go off. But in auto mode, when it gets dark, the lights come up but the turn signals stay on.
Thanks.
Hi ZPaul, I'm still working on this, I think I need another breakfast under my belt. I believe I understand how the Auto Lights function logically, I just need to see if I can come up with a way to turn the DRLs off when the auto turns the headlights on.
Hi ZPaul, I'm still working on this, I think I need another breakfast under my belt. I believe I understand how the Auto Lights function logically, I just need to see if I can come up with a way to turn the DRLs off when the auto turns the headlights on.
Let me give this another shot in the morning.
I will get back to you.
Frank
Thanks Frank!
I think it should be another signal that turns the lights on to be send to turn the Turn Signals off. I kind of understand it, but have no clue how to implement it.
Take your time please. I appreciate your help.
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2007 Toyota Tundra CrewMax Limited 5.7L 2WD, Timberland
I think it should be another signal that turns the lights on to be send to turn the Turn Signals off. I kind of understand it, but have no clue how to implement it.
Take your time please. I appreciate your help.
Hi Zpaul,
I have some information for you that might help. Some of this info is Fact, some I highly suspect to be fact but cannot directly prove.
I can tell you as fact that the Turn Signal/DRL Lights on your Tundra using the Auto Light Mode SHOULD turn OFF when the Auto Mode Turns on the headlights.
In other words, yours are not working as they should be with this design.
I tried to verify this via the electrical diagrams, but could not make that determination based on the diagrams alone. One never knows what goes on inside the computer black boxes. At least not all the way.
This morning I called a young man who lives nearby who I had help install this DRL modification. He has Auto Mode Lights. I asked him if I could stop by and run some tests on his truck to see how the DRL/Turn Signals lights work when the Auto Light Function was used.
Long story short, He told me to drive over to where he works, gave me the keys and let me test away.
His Tundra is a 2007 Limited Crew Cab, with Auto Light Function and came from the factory WITH OUT DRL. He and I installed this DRL Modification several months ago.
On his truck, with ignition key “ON”, and the headlights are OFF, the DRL/Turn Signals are “ON”. This is goodness.
When the Headlights are Turned ON, either by the switch, or by the Auto Function (I had to cover the sensor to make this happen) the DRL/Turn Signals Do Indeed Turn Off, as they should.
What this tells me is that this design does work, even in Auto Light Mode.
What I Believe
Something is probably wrong with your installation, most likely involving Relay “B”.
When Relay “B” is at REST (Not energized because the headlights are OFF) it provides a ground to the DRL Relay. This turns the DRL/Turn Signal bulbs “ON”.
When relay “B” is “Energized” (This happens when the headlights are ON) the Ground path to the DRL relay is broken, or “Opened”, effectively turning the DRL/Turn Signal lamps “Off”
To be more specific I would be looking for a problem in these areas.
1) Is Relay “B” Good? It is rare but I have seen new relays fail right out of the box. To test, swap relay “A” with relay “B”. See if the DRL still work. If not, the relay is bad.
2) Check the wire going from Pin 86 on Relay “B” to the left front headlight.
Make sure this tap is mechanically and electrically sound near the headlight. If it is not, Relay “B” will never energize when the headlights are on. When Relay “B” is energized, it shuts off the Ground Signal going to the DRL Relay, which turns the DRL/Turn Signals Off.
3) Make sure there is NO WIRE connecting pin 87 on relay "B" to anything at all. This Pin is not used and cannot be connected to anything, especially not to a ground.
4) If you are using a relay socket to plug your relay into make sure the female connectors in this socket are sound mechanically and electrically. It wouldn’t be the first time one of these failed.
5) Double check all your wiring and electrical connections.
I am convinced something is preventing relay “B” from working. Time invested in checking this out should be worth your while.
Hope this helps you out my friend. If it doesn’t, I’m more then willing to continue to help trouble shooting this with you.
Just finished the install. Amazing instructions!!! Works perfect. Thanks a million.
The only problem is the dealer that brought the truck into Canada did a hack job installation under the hood with an aftermarket relay. They spliced wires and didn't solder. I removed what they did and put your installation in. They had the low beams coming on which was dimming the interior lights during daytime hours.
Just finished the install. Amazing instructions!!! Works perfect. Thanks a million.
The only problem is the dealer that brought the truck into Canada did a hack job installation under the hood with an aftermarket relay. They spliced wires and didn't solder. I removed what they did and put your installation in. They had the low beams coming on which was dimming the interior lights during daytime hours.
Thanks again!
Thanks for taking the time to post your results.
It's always nice to hear that others are getting some benifit from this.
After looking at your wiring diagram and the ones from Toyota involving the Headlights, Turn signals, and ignition circuits. I see that you are trying to get a voltage signal from the "Green" headlight wire to the relay so it will "Turn" off when the headlights come on, Correct? If this is in fact the case, it may be easier to just tap the "Blue" wire off the "DB" block at pin "18" from which power is fed from pin "8" on the ECU, this services the "Left" headlight. The right headlight is serviced by the "Red" wire at pin "16" on the "DB" block and pin "11" on the ECU. This circuit provides a voltage to the headlight relay, which then activates and sends the voltage through the fuse box and on to the "Green" wire for the left and the "Brown" for the right to turn "On" the headlights. Now, I'm not saying that its not easier to just run the wire through the firewall and tap the "Green" wire, I am just looking for a cleaner way. I have not been able to test this as the weekends have been rainy and I do not have the facilities during the week to do this. Has anyone or is there anyone who may be able to verify this? It may make this installation cleaner and a bit quicker if this works. There may also be another way to get a voltage to the relay to have it turn off the DRL when the headligts are on. Again, all I would like is NOT to have a wire running through the firewall up to the headlight.
HI Frank
You can add another 2007 Tundra to your list I followed your instructions 100% and I now have DRL ,the instructions were easy to follow.The only mistake I made is I did not buy the flasher in Vermont were I bought the truck and it cost me 101.00 plus tax here in Canada.Thanks again for the help Helmut
Ok I just tried to take my non-DRL flasher out and I am confused.
Is the thing that J29 is connected to actually the flasher? IE the white box with the black cover on it? Or is the relay under that black cover? I got the black cover off with the connector still on and just saw what looked like silver wire loops inside the box.
If the larger white box IS actually the relay, how the heck do you get it out?
If it is NOT the relay, where is the actual relay? Is it the little black box that is above and to the left with a two wire black plug going into it?
Help!
EDIT
I found a picture of the relay in a different thread!
One other question...I bought the relay socket you suggested and pins 87 and 86 are wired together between the two sockets (ie A-87 is wired to B-87 and same for the 86s)? Do I just cut those wires and redo it like the diagram shows?
EDIT
OK I figured this bit out...I just pulled the wires out, cut off the extra wires where the were hooked to the connector, and put the connectors into different spots, so where I have the no-connects I now have no wire at all to worry about. Just need to know where the actual flasher relay is by the main body ECU and I'll be good to go.
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Matt
2008 Toyota Tundra || Salsa Red Pearl / Black|| 5.7 L V8 || TRD
“DRL Control” Connection
Find the GRAY WIRE, located in pin position 5, on connector J29, located on the
Flasher Relay.
You need to “Cut this wire about 2-inches from the plug-in connector J29.
Connect and Solder the end of this GRAY WIRE that is still attached to the J29
plug to a wire, which will then go to Pin 87A on Relay “B”
Insulate the other end of this GRAY WIRE, which you just cut, with electrical
tape. Make sure it is insulated well.
The gray wire described above is shown in the wiring diagram on page 3 as originally having gone between Pin 8 on J3 and Pin 5 on J29. To do the mod, that wire is cut 2" from J29, and attached to Pin 87A on relay B with a wire. Then the remaining part of the wire that is still connect to Pin 8 on J3 is what is taped off and insulated, correct?
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Matt
2008 Toyota Tundra || Salsa Red Pearl / Black|| 5.7 L V8 || TRD
Re: DIY: How-To-Enable DRL – 2007 Tundra
Re: DIY: How-To-Enable DRL – 2007 Tundra
Linear Mode
