Technical 1980 Spider 2000 with ignition switch issue

[gtderpic]

Afternoon

I'm new to the forum. I just picked up a 1980 Fiat Spider 2000 - had been sitting around for a bit - would not start. Replaced the starter relay and now it cranks, but I'm not getting power to the fuel pump - pump worked if i jump from brown to green on the relay. I have 12v at the brown wire a the fuel pump/injector relay but only getting 8-9 volts on the red/black wire - I checked and only getting 8-9 volts at the red wire at the ignition switch.....bad ignition switch?....corroded contact inside?

 

[ZaphodB]

Hopefully I've got the right diagram, but 12v feed to the relay comes in on 88y (brown/white and then via an inline fuse 04524) and then out to the pump on 88d (green/black) ?

(I've marked with red arrows)

 

[Twink80]

Afternoon

I'm new to the forum. I just picked up a 1980 Fiat Spider 2000 - had been sitting around for a bit - would not start. Replaced the starter relay and now it cranks, but I'm not getting power to the fuel pump - pump worked if i jump from brown to green on the relay. I have 12v at the brown wire a the fuel pump/injector relay but only getting 8-9 volts on the red/black wire - I checked and only getting 8-9 volts at the red wire at the ignition switch.....bad ignition switch?....corroded contact inside?

Hi The best solution is a wiring diagram and a multimeter to measure voltage
If yours is a fuel injected car it runs on an ECU and if you start guessing and crossing wires together you could do a lot of unintended damage
The wiring is pretty crude by modern standards, the connectors are basic and pins readily oxidise and several circuits especially those on the ignition switch carry high current (10-15Amps) which will do a lot of damage very quickly!

 

[Twink80]

Hi The best solution is a wiring diagram and a multimeter to measure voltage
If yours is a fuel injected car it runs on an ECU and if you start guessing and crossing wires together you could do a lot of unintended damage
The wiring is pretty crude by modern standards, the connectors are basic and pins readily oxidise and several circuits especially those on the ignition switch carry high current (10-15Amps) which will do a lot of damage very quickly!

I forgot to say work your way through each circuit methodically confirming its function