Hey guys I'm in need of a switched power source for a secondary fuel pump.
The stock pump is still in place and functional.


I was looking over page Z-28 (sounds like a Chevy:-)) in the electrical manual and it looks like a good source would be JB-03 right after the fuse.
I plan to have the source run a relay and the power wire will be directly off the positive terminal on the battery, fused of course.


I'm looking for the easiest, shortest, fused source that will run the pump when the stocker runs.


Any concerns with the fuel pump fuse blowing with the small additional load from the relay? The stock pump just pumps to a reservoir, the additional pump supplies pressure to the engine.

 

Why don't you just run two new wires, and use the existing wire to trigger the relays?

 

That is exactly what I'm planning on doing.

Power wire from battery to pump w/in line fuse.

JB-03 intersection to switch new fuel pump relay.

I was just wondering if some of the electrically gifted individuals had any easier/alternate options for the relay switching.

 

I think that's about as easy and clean as you could get. The fuel pump(s) will switch on with the stock ECU switch-on signal. Relays don't use a lot of current to stay switched on, so it shouldn't be a problem for the circuit.

I would also bypass the 9/12v fuel pump resistor relay by the brake booster so the circuit always sees 12v.

Dale

 

For another vote i would just piggyback the stock fp power wire to one side of the relay coil. run a ground wire to the other side of the relay coil. put the fused power wire from the battery to one of the relay switch posts. put the wire from the new fuel pump to the other relay switch side. the relay has >.5 amp draw to stay closed so it should not have any effect on the stock pump. and it will be turn key? Jeff i thought you were a little more stock than this?

 

I don't think this is for Jeff's FD. :-) He is helping the competition!!