Scotty Dont Posted June 20, 2012 Report Share Posted June 20, 2012 I have searched for a while and can not seem to find a place in the cab to tie in the switched 12v for the fuel pump. My stock ecu wiring harness is long gone otherwise I would use the test port. Thanks in advance for the help! Link to comment Share on other sites More sharing options...
CaliConquestAlex Posted June 20, 2012 Report Share Posted June 20, 2012 Why not connect it to the the stock ignition wires or just setup a toggle switch for it? Link to comment Share on other sites More sharing options...
badazzquest Posted June 20, 2012 Report Share Posted June 20, 2012 I was looking for a switched source to hook up a relay. I used the cig lighter hot wire. It is switched. I used that to trigger the relay. A round male terminal fits nicely into the stock harness with a little snugging. Pull the HVAC controller and computer out to access it unless you can get the lighter socket out. Link to comment Share on other sites More sharing options...
CaliConquestAlex Posted June 20, 2012 Report Share Posted June 20, 2012 I was looking for a switched source to hook up a relay. I used the cig lighter hot wire. It is switched. I used that to trigger the relay. A round male terminal fits nicely into the stock harness with a little snugging. Pull the HVAC controller and computer out to access it unless you can get the lighter socket out. That sounds like a good idea. Link to comment Share on other sites More sharing options...
BuGG Posted June 20, 2012 Report Share Posted June 20, 2012 Just like badazz said the cig lighter is a great place to get switched positive for gauges or anything you need switched 12v for. You just need one of these.http://www.ecolightled.com/images/uploads/bullet_connectors_male_red_500.jpg Link to comment Share on other sites More sharing options...
Technology Posted June 20, 2012 Report Share Posted June 20, 2012 You can use the stock main relay, triggered by the ecu, to run the fuel pump. Link to comment Share on other sites More sharing options...
CaliConquestAlex Posted June 20, 2012 Report Share Posted June 20, 2012 I have searched for a while and can not seem to find a place in the cab to tie in the switched 12v for the fuel pump. My stock ecu wiring harness is long gone otherwise I would use the test port. Thanks in advance for the help! You can use the stock main relay, triggered by the ecu, to run the fuel pump. Someone didn't read the complete post... Link to comment Share on other sites More sharing options...
Scotty Dont Posted June 20, 2012 Author Report Share Posted June 20, 2012 Guys I am looking to send power to the fuel pump via my computer but I found it, there is a black wire with a white strip on the passenger side wiring harness that runs along the door seal up the firewall. Link to comment Share on other sites More sharing options...
CaliConquestAlex Posted June 20, 2012 Report Share Posted June 20, 2012 (edited) You should add a switched "SPDT" relay from that source to your fuel pump to avoid adding any significant additional load on that circuit. The switched relays only draw about half an amp and the current is only used to trigger the relay to send power through the circuit, which would come from a direct battery connection or equivalent. Edited June 20, 2012 by CaliConquestAlex Link to comment Share on other sites More sharing options...
Scotty Dont Posted June 20, 2012 Author Report Share Posted June 20, 2012 Yah this setup is already on a relay, I was just looking for the place to send the power to closest to the ecu so I didn't have to run a wire all the way to the pump. Link to comment Share on other sites More sharing options...
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