Switched 12V to Boot for fuel Pump
Posted: Fri Nov 20, 2015 11:32 pm
Recently installed an electric fuel pump in my rhd S4 dhc. The loom has the wiring for the interior lights fitted on the pillars of the fhc so we picked up that cable (purple/white) adjacent to/behind the passenger seat and soldered in (and suitably insulated) an extension cable to the boot to power the fuel pump. As it is switched off the ignition it's perfect.
Everything was fine for a few days until the car died on me with what turned out to be a lack of fuel to the carbs. Diagnosis quickly proved that the pump wasn't running. As the cable was showing 12V I suspected the new pump. Jumped the pump off the battery and it roared into life. Rechecked the cable for the pump - multimeter showed 12V but it couldn't power a test lamp.
I'm assuming I have a poor connection somewhere with resultant voltage drop.
What I'm looking to know is where does the purple/white cable terminate up front?
The wiring diagram shows it runs to a connector strip/block?
So where's that? behind the dash on the bulkhead somewhere?
Everything was fine for a few days until the car died on me with what turned out to be a lack of fuel to the carbs. Diagnosis quickly proved that the pump wasn't running. As the cable was showing 12V I suspected the new pump. Jumped the pump off the battery and it roared into life. Rechecked the cable for the pump - multimeter showed 12V but it couldn't power a test lamp.
I'm assuming I have a poor connection somewhere with resultant voltage drop.
What I'm looking to know is where does the purple/white cable terminate up front?
The wiring diagram shows it runs to a connector strip/block?
So where's that? behind the dash on the bulkhead somewhere?