I installed an EWP but Im a retard at wiring. Ive read about adding a relay but dont understand how it works or where I would put it on my vette. Does anyone have any detailed insight on this and maybe a few pics? Thanks.

 

Wow not a lot of help on this one. I found a solution but need to confirm the color of the fuel pump wire coming out of the fuse block. Ive read that its Grey or Gray. Does anybody have a 100 percent on this.

 

i tried the zip harness but it almost burnt up my car. had to get a new fuse box b/c it melted the fuses inside. glad i caught it when i happened. when nitro daves installed my nitrous they rewired it all for me so i don't have to use the fuse box and that harness. wish i could tell you how they did it.

 

i have had the zip harness for 2 years no problems i dont like the way it spreads the factory fuse clips with the piggyback, you would think it could plug in and empty fuse or acc spot, or they would have a fuse plug in and an extented or added fuse spot for a real piggyback

 

i thought the fuel pump wire was pink

 

http://www.ls1howto.com/index.php?article=27

I got this link it says the wire is grey but its for an LS1. I know chevy likes to keep a lot of things the same so Im hoping the wire is too.

 

you might be right, put a tester on it.

 

I cant believe nobody actually knows which wire it is. We have some super geniuses in here with tons of vette knowlege and not one person has a definite answer on which wire it is.

 

I wired my EWP to a relay and added a switch to turn it on while the car is off. I used a 4-wire 40amp relay for my EWP. The relay has four terminals. ground/power/signal/acc. There are two wires coming out of the EWP (gray & black) I think. The black got grounded to the chasis. The other wire went to the acc on the relay.

I then grounded the the relay to the chassis and then gave it 12V from that power post in the fuse box. The signal wire can come from anything that turns on while the ignition is on and stays on. I found some like that in the psgr side fuse box in the cabin. Other people use a wire from the injectors or something like that, but since I couldn't find it or figure that out I just used this one.

MISC...
My switch is wired just like a normal switch but the "acc" wire is sliced into the signal wire that goes to the relay.

Hope this helps.

BTW... Anytime you're using a relay, always install the relay as close to the item you're powering. This way the power wire you're feeding to the EWP stays as short as possible with less resistance.

 

I'm also running an EWP (Meziere). I installed it and temporarily ran the power directly to the battery, then drove the car to a friends shop. Here we wired the pump, through a 40 amp relay from the passenger foot well fuse box. We found a location on the fuse box that was a switched power source, as well as one that is powered in the accessory mode. The acc mode will power the pump for up to 20 minutes, they turn itself off. This is a great feature on 100+ days, as I can lock the car with the ignition in the acc mode and run inside to take care of an errand, and while I'm gone, the coolant continues to circulate through the engine and radiator. In 10 minutes it will cool the engine 80 degrees. Great for track days, too.

I wish I could remember which fuse we tapped into, but, any competent mechanic should be able to identify the circuit.

I love my Meziere. It pumps a constant 55 gph, vs the stock mechanical pump that puts out a weak 22 ghp @ 5000 rpm. I also run a Ron Davis radiator and LPE oil cooler. I never have cooling issues, even on 100+ days with full ac. Coolant temps in the 190's and oil around 200.

 

I remember this and that is not all of the facts. If my memory serves me right your friend was installing this for you and the fuse holder in your fuse box was spread to wide as to where there was not a good contact.
I explained to you how to fix this, if a contact is loose it will generate allot of heat and this is what your issue was, not our harness. I have sold hundreds of these, Meziere has been trying to get us to make them for all the makes of cars because they do work well. You are the only one that an issue that did not involve just now knowing how to plug it in.

I would like another way to tap into the lines also, but as of now nothing exists. We can't just use another "pwr" in the fuse box because of the way the harness is designed to work. It is designed to blow the fuel pump fuse if the pump shorts out so that you don't overheat the car. I have been trying to work on a solution for it, but so far I have not found one that works better then what we have now. There are some better ways to tap into the fuse, the problem is that it would increase the price of the parts by about $40. I have been looking into this and will probably push forward with it in the next 6 months.
Thanks
Justin