Time Delay Relay

[krbjmpr]

Anybody use time delay relays on their vehicles?

Looking for a way to introduce a delay for Headlights turning on. Currently, headlights come on when I insert key and rotate to 'run'. Can see them 'pulse' as starter motor rotates.

Want the headlights to remain off for maybe 5 seconds as engine starts.

Thinking that a delay relay triggered by starter solenoid coil wire would work. Normally off, time delay started when triggered, then relay remains on. Would be inserted after headlight relay and before Headlights so when vehicle is off, relay is off as well.

Problem is I can't seem to find any viable delays. All I have come across will trigger like I want, but then will turn off.

Suggestions? Local dealer said is "impossible" and if possible, would be illegal to modify the intent of operation set by GMC. What a crock!

 

[Marky Dissod]

Anybody use time delay relays on their vehicles? Looking for a way to introduce a delay for Headlights turning on.
Currently, headlights come on when I insert key and rotate to 'run'. Can see them 'pulse' as starter motor rotates.

Want the headlights to remain off for maybe 5 seconds as engine starts.

Thinking that a delay relay triggered by starter solenoid coil wire would work.
Normally off, time delay started when triggered, then relay remains on.
Would be inserted after headlight relay and before Headlights so when vehicle is off, relay is off as well.

Problem is I can't seem to find any viable delays. All I have come across will trigger like I want, but then will turn off.

Suggestions? Local dealer said is "impossible" and if possible, would be illegal to modify the intent of operation set by GMC.
What a crock!

Somehow I think a Body Control Module, programmed to function as a PPV / SSV would -
lights don't turn on or off until YOU turn them on or off, BCM never 2nd-guesses operator-
would suit you (and many of us) better.

 

[Doubeleive]

take the spring out of the headlight switch, then you have full manual control
otherwise you will have to wire up a relay/delay there are a crap ton of them on ebay $10 and up

Direct 12V out car timer switch time relay 1-150s control kit delay off box 20A | eBay

ð Safety Features: For added safety, a 20A fuse can be installed at the red wire to protect against overloads and short circuits. This approach will expedite the resolution process. We are committed to assisting you throughout the entire process.

www.ebay.com

12V Relay 4 PIN Automotive 75AMP 75a Normally Open Contact Fused | eBay

It can cooperate with various devices to boost vehicle functions and capabilities. 75A 12V start relay x 1. It is ideal for engines and other heavy-duty applications. Conveneint to Install: No welding, cutting or drilling required to connect our 12V automotive relay.

www.ebay.com

12V DC Delay Relay Delay with Timer Turn On/Delay Turn off Switch Module Delay C | eBay

Quiescent Dissipation: 13mA. 1 x 12V Delay Relay Turn on/ Turn off Module. Relay Load Capacity High Performance Load Capacity: Capable of handling large current loads up to 250V AC 10A or 30V DC 10A, ensuring optimal performance and safety for your electrical devices.

www.ebay.com

 

[j91z28d1]

what you're describing is a time delay latching relay. they do make them, kinda hard to find and probably more of a din rail mounting type ment for inside electrical control boxes.


easier would probably just a be a time delay relay replacing the headlights relay. something adjustable, but say 15-20 seconds would let the engine start and click the lights on in a reasonable amount of time.

do all these trucka headlights dim while cranking? might be a sign of incoming electrical issues. battery cables and bad ground points are common wear items

 

[krbjmpr]

Well, I know mine dim as engine turns over as are LED, and are bit sensitive to incoming voltage. No driver needed / provided.

Most of the relay solutions I have found offer delay off, meaning output is turned off after x delay.

It did dawn on me that I can trigger coil of another 5 pin relay, and switch output duration by using NC contacts. Might go that route. 3 relays to control LED headlights. Sheesh!

If I had a tech2, might be able to do something with BCM, but I don't and my 2012 requires CANdi and subscription. At least is what I am told...by dealer...that doesn't want to 'break the law'. Jury is out if a Tech2 would benefit me overall. I know functionality I want is there, truck starts remotely without turning on headlights.

I did try a voltage level triggered relay (smart relay) off alternator output. Worked well until truck decided to be stupid and stop charging while sitting at a light. No more headlights yesterday at 1am.

 

[j91z28d1]

delay on relay is very common. should be easy to find.

I have a clone tech 2. good to have when troubleshooting any fault codes and worth the 300$ if you're a DIY guy but it will not adjust anything in the bcm like you're thinking. you will need the candi box but it comes with the China ones and there's no subscription needed. you used to and may still be able to program moduals as a pass thru, and that will cost you money since you're using a laptop to connect and download software from gm website, and it just passes thru the tech 2. but I'm not even sure that works anymore and I have a separate dongle for that.


for a known name brand you can try Hella. they have 3 options, I believe you want HELLA DELAY ON Operate. but worth sending an email to double check. the wording can be weird.


Hella Time Delay on Operate Relay - 12V DC https://share.google/oZ0gphezWKzvydL3X

 

[mikez71]

Neat relay! I'm looking to do something with my washer/wiper. To delay the wiper action until the washer has begun spraying.
Might try a relay like that after the actual wiper relay which is implanted in the fusebox. Only drawback is, hitting the wipers normally will have the same delay. 1 - 2 seconds seems liveable..

I like Doub's suggestion. That way you have manual control!

But I'd get this either way, because it's useful for a few things...

 

[Doubeleive]

Anybody use time delay relays on their vehicles?

Looking for a way to introduce a delay for Headlights turning on. Currently, headlights come on when I insert key and rotate to 'run'. Can see them 'pulse' as starter motor rotates.

Want the headlights to remain off for maybe 5 seconds as engine starts.

Thinking that a delay relay triggered by starter solenoid coil wire would work. Normally off, time delay started when triggered, then relay remains on. Would be inserted after headlight relay and before Headlights so when vehicle is off, relay is off as well.

Problem is I can't seem to find any viable delays. All I have come across will trigger like I want, but then will turn off.

Suggestions? Local dealer said is "impossible" and if possible, would be illegal to modify the intent of operation set by GMC. What a crock!

when mine is turned to start the headlights go off, then come back on when the key is returned to run.
and no a tech2 will not change that but could be used to troubleshoot why it is happening.

 

[Marky Dissod]

... looking to do something with my washer/wiper. To delay the wiper action until the washer has begun spraying.
Might try a relay like that after the actual wiper relay which is implanted in the fusebox.
Only drawback is, hitting the wipers normally will have the same delay. 1-2sec seems livable ...

It takes so long for the washer to start spraying,
because the fluid takes that long to get from the reservoir to the nozzles.

 

[j91z28d1]

small push button to prime it. not auto but easy

 

[krbjmpr]

Think I am going to shelve this for a while. Dual battery setup should accomplish same goal.

The only delay relays that seem to fulfill the niche are based on 555 timers. While is an IC that I have a lot of experience with, and tolerates voltage fluctuations extremely well, another project may solve issue. Was looking for a drop in relay preferably to replace existing headlight relay(s).

 

[mikez71]

when mine is turned to start the headlights go off, then come back on when the key is returned to run.
and no a tech2 will not change that but could be used to troubleshoot why it is happening.

Yep.. That sounds about right. So there will still be one "pulse" as you crank it.
If you want your lights on during cranking because you have plenty of juice, autosync programming can do that also.

 

[krbjmpr]

Ah shoot, I am dumb this week.
No delay needed.
Wire Headlights through NC pole of a 5pin relay, tie coil to starter solenoid engage wire, relay turns off headlights when starter turns.

Much easier.

 

[yellowcj7]

Have an 02 Yukon XL. If I have the parking brake on, the headlights won't come on until I release the parking brake.

 

[ZKWBQD]

Anybody use time delay relays on their vehicles?

Looking for a way to introduce a delay for Headlights turning on. Currently, headlights come on when I insert key and rotate to 'run'. Can see them 'pulse' as starter motor rotates.

Want the headlights to remain off for maybe 5 seconds as engine starts.

Thinking that a delay relay triggered by starter solenoid coil wire would work. Normally off, time delay started when triggered, then relay remains on. Would be inserted after headlight relay and before Headlights so when vehicle is off, relay is off as well.

Problem is I can't seem to find any viable delays. All I have come across will trigger like I want, but then will turn off.

Suggestions? Local dealer said is "impossible" and if possible, would be illegal to modify the intent of operation set by GMC. What a crock!

Perhaps someday in the future Detroit will UPGRADE the lighting so that the driver has definite control of the lights. You know, like people did 30 years ago.

 

[Marky Dissod]

Perhaps, someday, in the future, Detroit will UPGRADE the lighting so that the driver has definite control of the lights.
You know, like people did 30 years ago.

In 30 years most people won't know how to drive at all. People have less & less control every day, at every level;
we're being taught to WANT less & less control of finer details.

That's why it's not rude to assume that people are too dumb to be able to talk on a cellphone & drive at the same time,
even though I remember talking on a push-to-talk radio to my dispatcher without being inattentive to my driving.

On a vaguely related note, my mid 90s Caprice & Fleetwood would light up ADDITIONAL turning lights to help me see around corners.
Why does it seem like when I watch other vehicles turn these days, they shut lights OFF during turns?

 

[redman2025]

Timer WiFi 10 AMP 6V 12V 18V 24V TIME ON Off DELAY CONFIGURABLE, Cycling and Optional Trigger

Timer WiFi 10 AMP 6V 12V 18V 24V TIME ON Off DELAY CONFIGURABLE, Cycling and Optional Trigger - Amazon.com

Timer WiFi 10 AMP 6V 12V 18V 24V TIME ON Off DELAY CONFIGURABLE, Cycling and Optional Trigger - Amazon.com

www.amazon.com

 

[BigDogYJ]

on my rig being a diesel i have a habit of turning the key to run and waiting a few seconds which is plenty for the wait to start light to do its thing then I crank it. In the gmt800 series, the headlights turn off during crank. I got tired of headlights turning on immediately. Then off while cranking and back on again. So I bought a relay harness usually used for HID installs. It uses a relay to pull power directly from battery, and has two 9006 outputs for the two headlights. Also has a single 9006 input which one of the factory headlight harnesses plugs into. The other headlight harness gets filled with dialectic grease, heat shrinked and taped to keep out water etc since it’s no longer used now that you use the relay harness.

Then I replaced the relay in the relay harness with a 10sec delay on relay like this:
Time Delay Relay 10 Seconds 5 pin... https://www.amazon.com/dp/B0744HSF8P?ref=ppx_pop_mob_ap_share

 

[j91z28d1]

In 30 years most people won't know how to drive at all. People have less & less control every day, at every level;
we're being taught to WANT less & less control of finer details.

That's why it's not rude to assume that people are too dumb to be able to talk on a cellphone & drive at the same time,
even though I remember talking on a push-to-talk radio to my dispatcher without being inattentive to my driving.

On a vaguely related note, my mid 90s Caprice & Fleetwood would light up ADDITIONAL turning lights to help me see around corners.
Why does it seem like when I watch other vehicles turn these days, they shut lights OFF during turns?

they turn off the accent lighting so you can see the turn signals. at least on gm stuff.

something else we didn't have to deal with. 1000$ fancy headlights lol. I remember those ditch lights I think they called it. when your turned on the turn signal, a white side marker light came on. I would like this in today's cars.



I personally blame the IPhone for showing or atleast making it acceptable for people to know absolutely nothing about tech and still be about to use it. even a windows pc made you know a little to do basics stuff. like at least understand a fileing system structure.

 

[krbjmpr]

I would love to have 'ditch' lights back!

Project #5842.

My wife's 2020 Tundra has auto and manual control of headlights. On auto, damn things stay on for 3 minutes. On manual, they stay on all night. Pickup will still start.

Maybe I should just buy an old 3/4t 1980s model 'burb. Pre-fuel injection. Bolt on Holley Pro-Jection.I am done with this electronics b.s. that can't be altered easily.