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  #1  
Old 12-06-2009, 07:25 PM
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Underhood fuse boxes, which is a good switched power?

I'm getting LED project ready to go for install over the xmas break.

I want to hook up the LEDs and tap into a blade fuse under the hood for power. Has anyone with a 08 WK found a particular fuse that is on with the headlights or daytime running lights? I suppose another option is just a blade fuse that has power whenever the key is on.
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Old 12-06-2009, 08:05 PM
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Re: Underhood fuse boxes, which is a good switched power?

escape did a halo hookup directly to the relay for the parking lights. try a search on him and relay.
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Old 12-13-2009, 01:25 AM
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Re: Underhood fuse boxes, which is a good switched power?

Robpp informed me about a simple piggy back type fuse holder they sell, can go off of the headlight fuse and has the ground and power power wire you would need that work with the headlights.
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Old 12-13-2009, 01:00 PM
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Re: Underhood fuse boxes, which is a good switched power?

I have not found a good start/run circuit yet on the newer vehicles. At least not one that you can actually run something from.

ALWAYS stay away from any Auto Shutdown (ASD) circuits. The ECU and associated modules are very sensitive to circuit draw and resistance.

Best thing to do is on any circuit used, use a 30 AMP 5 pin automotive relay and simply let the circuit trigger the relay and then run the load through the 30/87 relay pins.

There will be an 87A pin in the middle that would be hot all the time until the relay triggers, then it goes dead and the 87 pin becomes hot.

Your 12v+ goes into pin 30 from the battery.

Pin 85 goes to ground, and pin 86 is connected to the vehicle trigger circuit.
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Old 12-13-2009, 06:56 PM
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Re: Underhood fuse boxes, which is a good switched power?

im on the same rt as tim, use relays to do anything that has to do with any type of lighting. thats how some shops do alarms and fog lights. they tap into the parking lights and if its running fogs or other types of lights, a relay is used as a trigger and the battery is the main sourse of the lights. here is how the wiring should be like. http://www.weendoggy.com/images/relay_wiring.jpg
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Old 12-13-2009, 09:54 PM
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Re: Underhood fuse boxes, which is a good switched power?

thanks guys!
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Old 12-14-2009, 12:25 AM
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Re: Underhood fuse boxes, which is a good switched power?

^^^^over my head. Relays and how to actually tap into them are confusing to me. So you find an open/not used relay, then what? Have to run a power wire to the part being installed, with a ground or is the relay already grounded in the box?
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Old 12-14-2009, 05:58 AM
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Re: Underhood fuse boxes, which is a good switched power?

Quote:
Originally Posted by Tim@NCTSLLC View Post
I have not found a good start/run circuit yet on the newer vehicles. At least not one that you can actually run something from.

ALWAYS stay away from any Auto Shutdown (ASD) circuits. The ECU and associated modules are very sensitive to circuit draw and resistance.

Best thing to do is on any circuit used, use a 30 AMP 5 pin automotive relay and simply let the circuit trigger the relay and then run the load through the 30/87 relay pins.

There will be an 87A pin in the middle that would be hot all the time until the relay triggers, then it goes dead and the 87 pin becomes hot.

Your 12v+ goes into pin 30 from the battery.

Pin 85 goes to ground, and pin 86 is connected to the vehicle trigger circuit.

in english please???
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Old 12-14-2009, 01:00 PM
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Re: Underhood fuse boxes, which is a good switched power?

http://www.the12volt.com/relays/relays.asp
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Old 01-14-2010, 05:26 PM
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Re: Underhood fuse boxes, which is a good switched power?

can anyone elaborate on how to use a relay? i want to add led's to my truck in the front and want to wire in a fuse(10amps) at most
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Old 01-17-2010, 08:26 PM
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Re: Underhood fuse boxes, which is a good switched power?

Quote:
Originally Posted by B.P.O.D View Post
can anyone elaborate on how to use a relay? i want to add led's to my truck in the front and want to wire in a fuse(10amps) at most

What type of leds do you want to add to the front?
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Old 01-21-2010, 03:35 PM
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Re: Underhood fuse boxes, which is a good switched power?

you will see timmy i'm actually doing it sat no lie either and a few other spots but those will be later on. waiting for delivery on my new leds...
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