[sum_weirdo]

I know I've seen a diagram for this somewhere on the forum but I can't seem to find it. I need a dedicated switched 12 volt source for my methanol pump. Is there a port in the main fuse box where I can put an add-a-circuit?

 

[GTchris]

Could you splice into the fuel pump?

 

[sum_weirdo]

Think that would be counterproductive. I'm pushing the stock limits of the fuel pump with the amount of boost I'm about to run, even a small power drain might be problematic.

 

[GTchris]

There should be extra relay slots in the power distribution box under the hood. You could run you own wire and switch. You would probably either have to run it to the ignition of another source of install your own switch.

 

[KlrStng]

I would use the noise reducer line as a trigger, then use a relay to bump it to a dedicated line.

Just tap the wire going to the noise reducer on the passenger side, run that to a regular bosch SPDT relay, pin 85. Then ground pin 86. Now tap the big battery terminal on the fuse box with a fused wire (put a ring connector on one end and screw it to the 10mm terminal). Connect that to pin 30 on the relay. Now Pin 87 is your 12v switched with whatever size circuit you want. It can easily handle a 40a load, just put the fuse in you want and make sure your wire gauge from the 12v terminal to the relay and from the relay to your device is sized for the amp load. You can mount the relay on the wheel well next to the fuse box and tie the wires up and hide them under the fuse box if you want a nice clean look. Loom them with 1/4" black split loom to protect the wires and keep it looking clean.

First image is the location to grab 12v switched off the noise reducer, second image is a relay with what wires to attach where.

BE SURE TO FUSE THE 12V BATTERY SOURCE.

 

[TheKurgan]

I would use the noise reducer line as a trigger, then use a relay to bump it to a dedicated line.

Just tap the wire going to the noise reducer on the passenger side, run that to a regular bosch SPDT relay, pin 85. Then ground pin 86. Now tap the big battery terminal on the fuse box with a fused wire (put a ring connector on one end and screw it to the 10mm terminal). Connect that to pin 30 on the relay. Now Pin 87 is your 12v switched with whatever size circuit you want. It can easily handle a 40a load, just put the fuse in you want and make sure your wire gauge from the 12v terminal to the relay and from the relay to your device is sized for the amp load. You can mount the relay on the wheel well next to the fuse box and tie the wires up and hide them under the fuse box if you want a nice clean look. Loom them with 1/4" black split loom to protect the wires and keep it looking clean.

First image is the location to grab 12v switched off the noise reducer, second image is a relay with what wires to attach where.

BE SURE TO FUSE THE 12V BATTERY SOURCE.

This is exactly what I have done and then ran it to a seperate fuse panel under the glove box. I used the ignition wire for my switched source is the only thing different, but mine was for inside the car so it was easier. Works very well. I'll try to take some pics later....camera battery is dead.

 

[sum_weirdo]

Yeah I'll probably use the 12 volt battery source but I don't see that noise reducer on my v6. If anyone can point out a wire in the bundle that will be a good trigger that'd be great.

 

[stlwagon]

Tap right off the pos lead on the fusebox.

 

[truckguy]

Right next to the ecm is a large plug that is clipped down to the ecm mount towards the motor that has a red wire with a yellow tracer on it. It goes into one side of the plug but does not come out the other and it is on the top outer edge of the plug towards the motor as well. This wire is ignition activated and should work to trigger your relay.