fog light supervision

i have a viper 350 hv and was wondering if it would be a good idea to wire the fog lights into the dome light supervision output, that way when i disarm the alarm or turn off the ignition my fog ligths will come on. is the relay wiring the same?

-------------
gcorrea

Bad idea . . .

why?

-------------
gcorrea

yeah why not? the 350 probably has 2 batteries..

the wiring is BASICALLY the same,I dunno how good you are with relays,but it is very simple,you could probably use a couple diodes as well,but you SHOULD already have a relay,it just depends on how the relay for the fog lts are wired now..anytime? switched on only? parking lights,head,& high beams? just high+just low? if the lights are a prerequisite for the fogs,then you might need another relay as well,to retain what they do already,+do what you want them to do..
I haven't thought it through,so b4 you do it,maybe you should see what Teken has to say..
otherwise,if you want to discuss it,and brainstorm about it,pm me..I live to help others!..and rest assured if you ask me,I will think about why or why not more than the next guy..the proverbial next guy..
I haven't been posed with that exact situation b4,but that is my car audio life defined..haven't done more than I have!(exactly,anyway!)you know what I mean!!!
L8r People..

-------------
'Stereo' Mike
The Audio CARtist,LLC
9600 Balt. Ave.
College Park,MD 20740
301-474-6260

gcorrea wrote:

---

why?

---

1. How old is the vehicle?

2. How old is the battery?

3. Is the alternator the original?

4. What is the current draw / watts of the fog lamps?

5. What is the output duration (time) of the supervision?


Regards

EVIL Teken . . .

1.88 chevy silverado

2.optima red top about six months

3.no, high output at 145amps

4.two 55 watt xenon blue bulbs

5.one minute

 i have them on with ignition control, via a relay of course, with a 15 amp fuse so basically the lights are on when the engine is running, something like daylight running lights.

-------------
gcorrea

You will need a seperate relay (20-30 ampere is fine)and diode isolate to ensure there is no problems.

Ensure the proper guage wire and fusing is done. Realize that 9.17 continous amperes will be drawn for the whole one minute duration. This does not take into account the 1-2 amps from the dome light.

If the vehicle is not driven very long, or inclement weather conditions should arrise.

You will experience a no start situation. Please consider the pro's and con's for doing so.


Regards

EVIL Teken . . .

at work tonight i noiced DEI made a module for this application. well... for headlights that is. illuminated path or something. its something like 545T but i think thats the central locking module... ill look again and write the number down. its probably just 2 high current relays, maybe with a built in timer or something. its worth a look.

-------------
MECP certified installer

cool guys, but i wont have the domelight come on just the foglights so that would be minus 1-2 amp. would a 1 amp diode like for the shock sensors work fine.

-------------
gcorrea

gcorrea wrote:

---

would a 1 amp diode like for the shock sensors work fine.

---

I would opt for a 6 ampere diode if it was being used as the primary feed. But since it is only using the output from the alarm output to activate the coil of the relay, all you need is a one ampere diode.

Regards

EVIL Teken . . .

so wiring the fog lights instead of the domelight is basically the same configuration, meaning relay wise.

-------------
gcorrea

You wont really have a problem with it draining your battery. I have mine light up for 30 seconds after i turn offf the ignition. Thats all my running lights, 2x55 watt fogs, and my HID's. 92 explorer, red top optima, and 160amp alt. Just gotta figure the wireing. Your alarm might have an aux output with a timer and just use a relay at that point.

I think he was figuring on using the dome supervision..
correct?
if you will be activating a few relays(3 or more) i would activate 1,then have that activate the rest..that way you wont overload the output..@ 200 ma a relay,thats a little over 1/2 amp,which is a low limit on some transistors..
better not to take the chance..i think..
i would use a few relays anyway..they can be overloaded too..more surge than constant,i dunno how the lights act @ startup? i would kick on the system with an ammeter/mm just to check,hopefully it can 'record'(max/min) the readings..graphing would be better,because if its for like 50 ms or less,i dont think tahts a big deal,but get up into 200+,use a couple relays at least..nitrogen/argon filled would prevent carbon buildup on the contacts,but 3 bosch regular relays would be alot cheaper!
sometimes surge on fog lights can be 3x or more than the running current..

-------------
'Stereo' Mike
The Audio CARtist,LLC
9600 Balt. Ave.
College Park,MD 20740
301-474-6260