which fuses in our dash box comes on with the ignition source? i gotta run some toggles for my nitrous selonoid, and fuel pump relay. which ones can i tie into? also is the heater fuse an ignition source? i dont have a heater so might be able to use that?

 

The blower motor fuse is on the switched circuit.

You can use that one.

 

There are three blank ignition source spaces(keyed) in the lower left corner of the fuse block, and there are three blank battery source spaces(hot always) near the lower right corner of the fuse block(by the circuit breakers and stop/hazard fuse).

They're there for adding accessories, because car makers know that no one is ever satisfied... people always want more! They're even labeled appropriately, or, at least, they were when they were new... might've worn-off over the years: "ign" and "bat," and they each have tiny arrows pointing to them.

 

i tried puttin a fuse in it but the prongs dnt spread for the fuse to fit. do i gotta use different fuses? also i can use the heater fuse?

 

They might be tight if they've never been used, but they should open-up.

But those spaces aren't for fuses. They're for accessories' hot wires, so they only hold a single, spade-type(flat) male connector on the end of the hot wire. The hot wire for the accessory will usually have its own fuse within an inline fuse holder.

 

o cause i went down and the center that goes between the two prongs on the block isnt "cut out" the middle of the fuse bottoms out on it before touching the fuse connections
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i prob jus use the heater fuse and bump up the amp fuse size for two toggle switches. will that work?

 

how many amps do you need to run through them and what guage is the wire? i have a factory diagram for a 90 camaro, with color coding and i can look it up for you.

 

im not sure its gna be for my fuel pump relay and a switch for my nitrous selinoids/microswitch