Fuse box (+B wire) bypass question?

spawntaker

1jz lover
Nov 15, 2008
150
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36
Conroe,Tx
i bought a na shell and dropped a 7mgte in. and for some reason the supra wouldn't start. the engine wasn't getting power. so i figured it was a wiring issue. after 1 month of looking into the wires and swapping three different sets of harnesses (other then the engine harness itself) i decided to bypass the fuse box and connect the +B wire straight to the battery and what do you know the damn thing starts. my question is is there any way i could just run the +B wire straight to the battery on a fuse or relay or maybe should i run a second set of EFI fuse and relay for just the +B wire to the battery? what would be the easiest solution to get it running without problems later into the future? the reason i ask this is because i was going to run it on just a fuse but i didn't want to do anything that would screw up the supra but on the other hand i don't want to go through the wiring because i'm to damn lazy. lol. just let me know what you guys think.
 

Heavy D

New Member
Jun 3, 2009
358
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worcester, ma
i had the same problem, what i did was i took a 7.5 fuse and wired it to the battery and then to the +B, but if you dont have a good working battery it will kill the battery, but that was just for temporary.
 

spawntaker

1jz lover
Nov 15, 2008
150
0
0
36
Conroe,Tx
well after all the battery dose kinda go to the +B. it goes from the battery to a 15a fuse to the main EFI relay to the +B but i think i might just run a new 15a fuse and relay just for the +B itself.