Please HELP me find a IGNITION source

[BigSix 10+ year member]

I have a 2000 cadillac deville and im trying to find a TRUE ignition source, the wires coming out of my radio harness are dead and im trying to hook up a battery iso relay for a 2nd battery .....i been looking under the steering column for an ignition wire but cant seem to find any luck can anyone steer me in the right direction? any input is greatly appreciated!

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[abrhino 10+ year member]

cig lighter

 

[Jh8909 10+ year member]

fuse box.

 

[BigSix 10+ year member]

cig lighter

i think i tried that and got 12 volts with the igntion off

 

[BigSix 10+ year member]

fuse box.

i wouldnt even know what to look for

 

[thormxkid 10+ year member]

wipers at the fuse box

 

[Jh8909 10+ year member]

haha get a dmm, put it on dc voltage, take a fuse out with the car off, put one lead to one side of the fuse and the other lead to the other side of the fuse. now have someone turn the key to ignition on without turning the car on and see if you get a 12 v reading the fuse tap it there.

 

[BigSix 10+ year member]

haha get a dmm, put it on dc voltage, take a fuse out with the car off, put one lead to one side of the fuse and the other lead to the other side of the fuse. now have someone turn the key to ignition on without turning the car on and see if you get a 12 v reading the fuse tap it there.

so it doesnt really matter which fuse as long as it turns on with the ignition?

 

[Jh8909 10+ year member]

yes. and ONLY if it has 12 volts at ignition. if it has 12v when the cars off stay away. you dont want any parasitc draw in your system. oh and for each time you test a fuse with the dmm, switch the sides that you have the leads on and check again. fyi

 

[BigSix 10+ year member]

k...koo thanks bro! i give it a shot tommorrow when the sun is out....

 

[Jh8909 10+ year member]

yep np

 

[x1le 10+ year member]

or you can just tag the thick orange wire @ the ignition harness....

 

[BigSix 10+ year member]

or you can just tag the thick orange wire @ the ignition harness....[/QUOT
there wasnt a thick orange one...only a thick yellow one and it read 6.0 volts on the dmm

 

[x1le 10+ year member]

no, it's there...

 

[BigSix 10+ year member]

Just wanted to say thanks to all the guys that helped me....I tapped into the fusebox and it works....thanks again