Fuse & relays required for L92/LS3 harness

[rickardss]

Hi,

I have an L92/LS3 with modified harness I bought from a member here. I'm preparing to start the engine for the first time and need some help on what relays and fuses I need. It appears I have everything except what would have been part of the OEM underhood fuse block.

I'm a real beginner with electrics but looking for guidance on what to do in terms of ignition, fuel pump, powertrain relays & associated fuses.

The unconnected wires I have coming from the PCM are labelled as below:

• 12 v+ feed to fuel pump
• battery & Fuse @ 20 amps
• Starter feed from neutral safety switch (purple)
• Engine harness 12 v+ key on fuse @ 25 amps (pink)
• Unlabelled wire grouped with above wire (orange)

Two of the above wires are already on a relay. (grey and pink). And that is not the engine harness wire.

I have an areomotive stealth tank that came with a wiring kit that included an extra relay so I assume only a single relay for the fuel pump is required?


There is also:

• Fan 1 relay control
• Fan 2 relay control
• Tach
• Speedo
• Tap shift module control for auto trans
• Brake light switch
• Check engine light
• OBD2 port

Any help would be much appreciated.