need some help cleaning up my wiring

kyle2002stang! · Apr 30, 2015

i want to run all my aftermarket accessories (boost controller, wideband, other gauges, line lock, trans cooler, fuel pump, etc.) off of a distribution block(s) like this.

6 Position 20 Amp Terminal Blocks | WiringProducts

i want to mount it in the trunk by the battery. how would i get this to have a switched 12V power though? i dont want all the gauges on all the time for obvious reasons. any better suggestions? also, the one in the link isnt the exact one i want, im just using it as an example.

mustanginky · Apr 30, 2015

Never even thought about this. Actually sounds like a way to clean it up.

dallashopps · Apr 30, 2015

Use relays. If you get a power distribution block with relay slots it would be clean, and the relays and fuses are pocket parts at the junkyard.

dallashopps · Apr 30, 2015

something like this...

kyle2002stang! · May 1, 2015

yes! something like that.

kyle2002stang! · May 1, 2015

so i found this.
Painless CirKit Boss Auxiliary Fuse Blocks | JEG'S High Performance

looks like what i need. can power 7 circuits and its ignition switched. but would i be able to run a big external fuel pump off of it?

kyle2002stang! · May 1, 2015

anyone have experience with something like this?

dallashopps · May 2, 2015

without looking at the specific item you linked, I'd say to defer to the amperage rating of the loads you intend to use. If your pump has installation instructions, it'll recommend a fuse size if you can't find the actual design current draw. The most common and readily available relays (generic 5 pin relays that I use for everything because they're awesome) are usually of the 30 amp variety, but without looking for specifics I'm almost certain there are larger relays that could also be sourced from junkyard power distribution blocks.

---------- Post added at 08:10 PM ---------- Previous post was at 08:05 PM ----------

Also, I know the Painless brand usually comes with a hefty price compared to some of the generic enclosures like the one from Bussman (or even a repurposed complete power distribution block from a junkyard). Any of the circuits can be made to operate with the ignition; the ones you want to be switched will be the ones running with relays. You can daisy-chain a small gauge switched power source wire from relay to relay as the signal to 'turn on' the relay- exactly like running multiple audio amps off of the 18-20 gauge remote turn-on lead from a stereo.

kyle2002stang! · May 3, 2015

the fuel pump im looking at is 14amps at 45psi.

dallashopps · May 4, 2015

You'd be more than safe with a standard 30 amp relay then. Figure out how many circuits you want total, add 3-6 to that number to leave options open, and go from there. If you're unsure about the wiring portion I can help (or lots of members I bet).
This is a project I've considered as well; probably doing it in conjunction with a battery relocation.

kyle2002stang! · May 4, 2015

so would the one i linked above be good then? its got 7 ignition hot circuits and two 40amp relays. im a wiring noob.

dallashopps · May 4, 2015

The link took me to the jegs home page, but I believe I found the part you're looking at. It uses the 2 relays to provide switched power to the circuits; check out the install instructions tab for specifics. You'll need to provide a switched power input, but it looks easy enough for beginner level. As long as you're not going to exceed the 40 amp rating of the relay per side, which from what you listed seems safe, it looks like a good fit.

need some help cleaning up my wiring

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