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Need help rewiring following fire damage

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Need help rewiring following fire damage

Postby ciaran88 » Wed, 10 Aug 2016 9:59 +0000

Following an accidental welding fire, I've had to rewire a complete section of the wiring loom along the drivers seat.

I was able to repair all wires until I came across two wires with the exact same colour and size, blue with a thin red stripe.

Front#1: 12V on ignition, no markings
Front#2: No power on ignition, gold text marking

Rear#1: Leads to fuel pump, no markings
Rear#2: Leads to ???, gold text marking

So going with my best judgement, I joined Front#1>Rear#1 and Front#2>Rear#2, and tried starting it up.

Unfortunately I had been charging the battery and manged to put it back in the wrong way round :oops: After the bit of smoke at the terminals, nothing much went bang and only the main 80A fuse was blown.

So I replaced the fuse and tried again. On ignition, a yellow light above the fuel gauge came on, seems it a rear window demister (Car doesn't have one :? )

When Front#1>Rear#1 is disconnected, the light goes out. Either way the engine will crank strongly, but not start. I can't hear the fuel coming on on ignition, ever with a stethoscope, although I don't recall ever hearing it in the past.

Any ideas?
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Re: Need help rewiring following fire damage

Postby MX5Spares » Wed, 10 Aug 2016 10:35 +0000

Pump needs to be running when ignition is on anyway.You can easily hear it by ear.

I have automatic car for scrapping here and I can sell you bit of the loom to pump, rear lamps etc
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Re: Need help rewiring following fire damage

Postby ciaran88 » Wed, 10 Aug 2016 11:23 +0000

Thanks, if the fuel pump should obviously be audible, I think I'll probe it a bit further first
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Re: Need help rewiring following fire damage

Postby ciaran88 » Sat, 27 Aug 2016 10:35 +0000

Got it sorted anyway, my first guess at the wiring was wrong, it was the opposite way round, the fuel pump only primes on ignition
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