positive 12 volt source when engine run - Toyota Nation Forum : Toyota Car and Truck Forums

yanlapanic · 07-01-2010, 12:25 PM

All is in the tittle , I search a place where there is 12 volt power source but only when engine is running , It only to place a relay to power something .

A picture would be nice If you want

Thanks you!

glow-plug · 07-01-2010, 02:47 PM

Do you want power when the key is in the postion or only when the engine is running?

yanlapanic · 07-01-2010, 04:19 PM

Quote:

Originally Posted by glow-plug

Do you want power when the key is in the postion or only when the engine is running?

Only when engine is running ,

glow-plug · 07-01-2010, 05:16 PM

You going to have to build some kind of logic circuit if you only want power when running.

yanlapanic · 07-01-2010, 05:18 PM

Quote:

Originally Posted by glow-plug

You going to have to build some kind of logic circuit if you only want power when running.

Im sure I can find a 12 volt source which will turn on my circuit

what do you think about fuel pump?

DjiNN · 07-01-2010, 10:09 PM

Is the device going to be in or outside the car.

Bitter · 07-01-2010, 11:04 PM

you may need to use a ground trigger on the relay and find something that the PCM grounds only when the engine is spinning.

yanlapanic · 07-02-2010, 03:28 PM

Quote:

Originally Posted by DjiNN

Is the device going to be in or outside the car.

Onboard ,
I dont understand what mean pcm ground and everything

Bitter · 07-02-2010, 07:14 PM

then you should read a good auto electronics text book before embarking on this venture, not trying to be an ass...just trying to save you some headaches. if you understand what you're doing vs just following directions then you'll be able solve your own problems instead of waiting for answers.

yanlapanic · 07-02-2010, 07:36 PM

Quote:

Originally Posted by Bitter

then you should read a good auto electronics text book before embarking on this venture, not trying to be an ass...just trying to save you some headaches. if you understand what you're doing vs just following directions then you'll be able solve your own problems instead of waiting for answers.

I think i'll put the relay after the relay of the hid , It seem that my hid start only when I start running ... and they stop when I close the engine (on DRL) .

Anyways It would be ok for the moment like this .