I am wiring up my Hobbs switch and getting ready to solder up the PCM wire on the relay. My question is, what pin on the PCM is it and or what color is it?

 

To make it easier I may just pull from the factory fuel pump harness if possible. In that case I am still curious what color the wire is?

 

Light green i think

 

Noted, I have seen a few references to R9 on the PCM too, but not sure if that applies to the trucks as well.

 

Well I failed at finding the wire last night when I briefly looked.

I looked for a light green wire on the fuel pump harness with no luck. I was wondering though, this wire is just essentially acting as a 12v switched correct? If so it could be a lot easier. Such as just tapping off the factory fuel pump fuse in the fusebox, etc.

 

The fuel pump harness is post fuel pump relay. A signal wire is the one that activates the relay. The positive wire actually going to the pump is purple or grey I think. The light green wire I was referring to is from the PCM to the fuel pump relay in the fuse box.

 

OK, that makes sense. So basically find the fuel pump relay in the fuse box and tap off the green wire on that. I am terrible with figuring this kind of stuff out which I bet is very obvious. That line is just a 12v switched in effect then it sounds?

 

Yea, if you look at the relay, 85 is a ground, 86 would be the light green one from the pcm, 30 would be to battery, and 87 would be to pump.

 

Nevermind, I found Atomic's picture in another thread. I was looking for a lime green, now I see which one it is.