Constant 12V Power Source

[soontobefastfox]

I am wiring up a black magic xtreme fan (and installing many other go fast parts) and I am unable to turn the car on and test with a voltmeter. I need a constant 12V source for my manual switch, is there any in the engine compartment or the interior?

I was thinking the cigerette lighter, but I am not sure if that is a constant 12V source, and if it is which wire is the +, I found there was not one wire red in it's pig tail.

thanks,
Matt

 

[jtfairlane]

In situations like this I like to use an auxiliary Fuse Block. Painless Wiring sells a couple types, one 3-circuit another 7-circuit. Either one offers at least one constant hot circuit (the 7-circuit block has 3 constant hot), so that way not only do you not have to patch into OEM wiring, but you know exactly what is constant hot and what is switched 12v.

 

[savegoodautonfg]

You can't just get a test light?

 

[HISSIN50]

There are many, but folks won't tell you without more info (and probably trying to get you to change your fan switching method ). You have left this pretty open - there are a zillion sources.

Under the hood, a constant source is the battery. Please don't switch a fan with only a toggle switch (and no relay).

Good luck.