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Gary, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 795
Experience:  Senior Technician
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Im in Australia, HSV Maloo :) 2011 HSV Maloo, installing an

Customer Question

im in Australia, HSV Maloo :)
JA: What is the model/year of your Pontiac?
Customer: 2011 HSV Maloo
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: installing an after market fuel pump
JA: Have you ever replaced the fuel pump, or is this the original?
Customer: currently its original, ive installed a supercharger and now want to install a dual pump intak setup
JA: Anything else you think the mechanic should know?
Customer: I want to know how to use the wires
Submitted: 5 months ago.
Category: Pontiac
Expert:  Gary replied 5 months ago.

Hi there,

Have you got the fuel tank out?

Can you see the connector with four wires on the MRA (top of the fuel pump assembly)?


Customer: replied 5 months ago.
Yep, 2 thick, grey and black, 2 thin purple and brown
Expert:  Gary replied 5 months ago.

Ok, Grey is pump positive, Black is pump negative (ground), Purple is sender positive, Brown or maybe brown/yellow is sender negative (ground).

You only need the Grey and Black for your pump upgrade.


Expert:  Gary replied 5 months ago.

If you feel the factory wiring might not be up to the task, you can use the grey wire to operate another relay.

Then run a new positive feed (and ground lead if you like) from your battery through the rear firewall.

I hope this helps you.


Expert:  Gary replied 5 months ago.

Hi again,

I hope my advice has been of assistance to you.

Kind regards