All good advice - I would definitely try doing those steps. Also try to measure the voltage getting to the motor while the motor is running - how much voltage drop (eg, reading < 12v) do you find? Perhaps there is resistance in the fuse/switch/connector.before just ordering a new expensive motor, I'd first remove the cowl in front of the screen (which you need to do in any case if replacing the motor) and clean and grease the wiper linkages....you could maybe even try a separate ground wire to see if the ground contact is poor.
right on, this approach works, this is an appropriate place to use fresh di-electric greaseThe grease inside the motor gearbox can become stiff with age. I have improved wiper operation by cleaning out the old grease and replacing it with new grease. It comes apart easily and goes back together easily provided that you don't pull the motor armature out. Then you have to avoid damaging the brushes.
Good result! I might try that myself now!Then, I took apart the motor gearbox and the the grease was a pure gunk.....
That's my experience too and it is not just switches. Connectors in the harness, fuse connections and of course grounds all cause volt drops and when you add them up they can be enough to cause poor operation. I had relays in the trunk for the rear lights in a GTV with a trunk mounted battery. I was losing 2 volts at the bulbs before I installed the relays.Fiats, and I believe Alfas also, suffer from power loss in circuits that go through ignition and other switches, particularly as the cars age. Power running through the switches also causes switch failure.
Not that I'm disagreeing that switches and connectors add resistance, or that this is a problem in X1 9's, but...I believe Alfas also, suffer from power loss in circuits that go through ignition and other switches, particularly as the cars age. Power running through the switches also causes switch failure.
They don't go through the ignition switch but they all go through other switches, fuses and multi-pin connectors in the harness. The column light switch is often problematic.most Alfa electrical components (heater fan, lights, windshield wipers) are driven directly from the battery.
All true, but what can be done to eliminate those switches, fuses, connectors? Converting to blade style fuses helps a lot - the original, pointy-ended fuses have a lot of resistance - but that is not a simple conversion. However, it's pretty hard to eliminate switches and connectors!They don't go through the ignition switch but they all go through other switches, fuses and multi-pin connectors in the harness.
True, Alfa light switches seem to be undersized for the amount of current they have to carry. And they're so darned expensive to replace that people look for work-arounds, such as adding relays.The column light switch is often problematic.
I'm not sure how a '91 Alfa is wired. On earlier spiders, the headlight current does not go through the ignition switch. Try turning on your headlights with the ignition switch turned off, and see whether they come on.AlfaMe said:The way I've had it explained to me is that there is more current going through the ignition switch than it can handle or pass efficiently as the electrical system ages, which is what causes the ignition switches to fail. Are Alfas wired differently? I was planning to at least add the headlight relay system to my Alfa, but if there's no need for it, I have other things to spend my time and money on
What if the insulation on that wire gets chafed through and it shorts to ground? I don't see why a fuse at the battery end wouldn't protect the wiring. Sure, the fuse would be sized for the load (say 3 amps) and not the big wire (say 20 amps) - but so what? The fuse would still blow before the whole harness melted down.I don't fuse this big wire as it will carry much more current than the bulb filament. Fuses are primarily to protect wiring.....
That's what the Director of the CDC is saying about an Ebola outbreak in the US. Let's hope you're both right!The wires are of sufficient quality and the runs are such that there is virtually no possibility of a ground short to the conductor. The risk is trivial.