Forgot to unhook battery, I know amateur mistake. So I was installing a fuel cut switch at the b/w center wire of the fuel pump relay under the dash. Now It won't run the pump even with the switch removed and the wire re joined. What have I shorted while soldering or have I melted something. Simply blown a fuse? I'm going to check the 15a enginefuse, would that be the one affected? I should point out ihsd the plug unplugged from the relay

 

Ok it is the fuse but the switch is what is blowing it. Am I supposed to run it through relay even though it comes from one? Or because I grounded the switch for the light on theswitch to work should I instead add an independent power source?

 

should be a fuel fuse,
Check the FAQs and you can get an idea where the fuse is,They have a pic of the cover for the interior fuse block in one of the threads.
I guess I do not have to tell you do I?..anything,ANYTHING Electrical,Disconnect your Battery!

 

also, to be sure, recheck the relay.

If you have one with a diode, make 100% sure the current is going the right way. If you did not, you prolly blown your diode and that is causing the blown fuse.

 

You simply might have grounded a wrong connector of the switch so the switch itself is grounded and not the light.

 

I think I had the two wires from the relay round the wrong way on the switch so when I turned it of it was grounding and blowing or something to that effect. I swapped them round and it's working sweet as.

 

Nothing like going down the road and having smoke come out from between your legs Ben...lol!

 

Haha yeah dont want my car to smoke in my car. It's a no smoking area, part of the reason why I didn't mind modding my cigarette lighter into a starter switch. Lol