Wiring the brake booster
This is how we use a Scorpio booster on our XR4Ti's here in the states, your wire colors might be the same.
Very easy to wire in with a standard four pin relay.. just take a 12+ feed to pin 30 of the relay, then wire pin 87 of the relay to the abs pump motor red + wire...and ground the other pump motor brown wire directly to the chassis.
pin 86 on the relay goes to a switched ignition live from the fusebox.
pin 85 is wired to the brown/black wire from the 5 wire pressure switch on the master cylinder.
find the brown wire on the pressure switch and ground it directly to the chassis.
This will allow the accumulator to build up the 2650 psi pressure required and will cut the feed to the pump motor when the pressure switch is tripped.
You can also wire in warning lights when the pressure is not up.
Last edited by NZWINRZ; 23-05-2014 at 05:34 PM.