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post #1 of 4 (permalink) Old 07-30-2019, 05:58 PM Thread Starter
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2 electrical issues

With engine running, 0 volts at fuel vapor recovery solenoid. If I apply voltage by jumping solenoid it makes a noise, but not a click and I still cannot blow air through it. I was thinking of replacing solenoid but maybe I have another problem, or maybe the solenoid is only powered intermittently.

13v at windshield washer, which I don't really need but my ocd makes me want to get it to work. Pump doesn't run. If I use jumper wires, 13v makes pump run. I tried a different ground and bypassing plug, but still no good. I'm thinking not enough current through switch/wire but my meter only goes up to 5 amps. Any ideas?

Thank you
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post #2 of 4 (permalink) Old 07-30-2019, 06:19 PM
But Mad North-Northwest
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I'm assuming this is a 1990? Purge solenoid is triggered by the ECU based on...some specific running conditions, I don't know. It's not always open when the car's running. Don't worry about it.

Yes, I would assume dirty terminals at the switch limiting current to the washer pump.


1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
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post #3 of 4 (permalink) Old 07-31-2019, 02:40 AM
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Originally Posted by TJ1 View Post
13v at windshield washer....Pump doesn't run.
If I use jumper wires, 13v makes pump run
Is your washer bottle under the front of car, drivers side, like on S4 spiders?

so you have voltage at the washer motor...correct?
but the motor won't run?

just how are you measuring that? IGN on and someone pulling the wiper column arm back whilst you measure voltage at the black/white wire connector on the little pump?
OR, are you measuring voltage at steering column stalk?

yet when you power the pump direct it runs....correct?

a thread on getting inside the column stalk (sounds like your problem, depending):

and a schematic:
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File Type: pdf wipe wash schematic.pdf (143.1 KB, 16 views)

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.

Last edited by spiderserie4; 07-31-2019 at 02:44 AM.
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post #4 of 4 (permalink) Old 07-31-2019, 04:56 AM Thread Starter
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Yes, it's a 1990. The reason I was checking the solenoid is because of the occasional fuel smell. I thought maybe it is a result of the charcoal canister not being purged. Alfa Parts Exchange is checking if they have one, $25.00. I considered just buying a $10.00 solenoid, but I am concerned of damaging the ECU. Hate to damage the ECU by trying to save $15.00. The washer bottle is under car, left front. I checked voltage there, by someone pulling wiper arm.
Thanks for the great info in your responses.
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