Immobiliser issue with old Subaru

[Zead]

My 1999 Forester turbo just cranks and won't fire. I have sparks but no fuel. I strongly suspect the immobiliser has not disarmed and cut fuel supply/pump. I've had an 'auto electrician' out who told me the car is a 'classic' so basically beyond his diagnostics machines capability! But agrees im probably right. Needless to say he wasn't paid nor expected it to be fair.
Does anyone one reading this, know a good auto spark who knows Sigma alarms on Subaru that could come out to Cheam in Surrey and help me. It's an auto so I can't even tow it to a garage!
Posted in the Subaru section too. Sorry for the repeat but need to be noticed 🙄
Thanks, Colin

[InitialDave]

Trace the wiring from the pump to find where they interrupted it and rejoin the cut?

[anonymous-user]

Have you checked both fuse boxes?

[Zead]

Thanks for replies.
I have checked fuses. Although there is not a 'fuel pump' fuse. I think it's one of the master fuses that looks like a relay. Internet not that helpful for this.
Wiring under dash is like spaghetti. Dealer alarm fitting, subsequent replacement and bypassing keypad and previous owner had a telephone just to mess things up too. Very hard to figure lying upside down in the footwell, what goes where.
When I crank the hazards flash once which is a sign the immobiliser is active.
Cheers

[InitialDave]

If you run a new ignition switched supply to the pump, does it work?

[Zead]

I'm reading lots about these alarms and it seems they don't cut fuel they just interrupt the starter circuit so don't crank at all. So the fuel pump or relay could well be at fault. I will run a feed direct to pump then work my way back. Doesn't explain the hazard flashing once but maybe it always did that and I never noticed

[Zead]

Many thanks to you guys for pushing me to think fuel pump. Hot wired pump and nothing. Pulled out pump and ran it on bench. It spat fuel out so I dropped it back in and got car to run for a short while but engine cut out trying to rev it. Pump then died. Got a Walbro delivered next day. Wired it up and put that in, problem solved.
Pistonheads I salute you, Z