No power to the idle solenoid

[jefftobrocke]

I've just replaced the carb on my 1977 Spider with a Weber 32/36 DFEV and there's no power going through the idle solenoid circuit that's now connected to the electric choke. Anyone have any advice where to start the chase?

[So Cal Mark]

fuse box

[jefftobrocke]

Yep checked, adjusted, cleaned. No power. Is there a relay between the fuse box and the solenoid?

[spider2081]

I've just replaced the carb on my 1977 Spider

Just checking on the year of your car is it a 1977 or a 1975?? ON the left side under your name it states a 1975.

I looked at the wire posted on Mirafiori. It shows the power for the solenoid coming from the ignition switch on a pink wire that then goes to the fuse panel. The fuses are not labeled so I am not sure of which fuse. It does not pass through the fuse it is power to that fuse. At the fuse panel it appears to be in the same spade connector and the light blue/black wire that powers the battery warning light. Does your battery warning light when you turn on the ignition?? This light/blue wire goes to C25 a 6 pin connector behind the instrument cluster. It combines with a Pink wire at that connector and the pink wire goes back through the fire wall to the ignition mode control switch. At the ignition control switch it combines with a grey wire that powers the idle solenoid valve. If your car was converted from dual points and the ignition mode system rewired I think that is where the pink and grey wires got separated.

[jefftobrocke]

I've a 1977 spider. Yes, the red battery warning light comes on when I turn the key to on and shuts off when the car starts. I'm baffled by this one. I rewired the ignition switch this past weekend with no change and all of the fuses are intact. Maybe I should ensure that there's continuity across each fuse?

[spider2081]

The wire diagram shows the solenoid should have voltage on it when the ignition switch is in the Start and Run positions. The fact that you battery warning light comes on should mean the wiring through the ignition switch up to the fuse panel is ok. Th wire to the solenoid is not fused it uses the fuse panel as a tie point to power a fuse and the solenoid. It then goes to C25 behind the instrument panel. C25 is usually on the left side of the steering column and has 6 contacts.
Does your car have the dual points still installed?? If not When that conversion was done I think that is when the connection was lost for the solenoid. Let us know if you still have the dual ignition points in your distributor and We can give you more assistance.

[jefftobrocke]

Just checked and the distributor is a single point system. What advice can you give me?

[spider2081]

originally the car had a dual point transfer relay that was controlled by a thermostatically controlled switch. At that switch there was a pink wire and a gray wire that came together on a single terminal. The pink wire is the voltage from the fuse panel it connected to the gray wire and powered the idle solenoid. I am not sure where this switch would have been mounted on the engine but I assume somewhere in the water jacket. Hopefully someone knows and can help you locate it. I think you need to see if the Pink and gray wire are attached to each other at that point.

[jefftobrocke]

Thanks, this gives me more direction to chase down the problem.