electrical Mechanical

Rain on the Windscreen

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When we got the RV, another one of the projects we had to work on was the windscreen wipers.  There were wiper arms,  something which may once have been wiper blades crumbling on the windscreen, a broken wiper motor and a few loose wires hanging behind the dash.  Exactly where the switch went I don’t know.

wipermotor

This was a fairly minor project.  We purchased a new wiper motor online, somehow only paying $5 for shipping.  No idea how companies price shipping.  Seems to be entirely arbitrary.  Anyway, fitting the new motor involved little more than removing a grill and and 4 bolts holding the old motor in place, and replacing it.  This was all great – I could wipe the windscreen clear any time I felt like tapping a wire on one of the battery terminals, but you can probably get a ticket if you try do that kind of thing while you’re driving.

3wayWiring the switch into the dash was a little more complicated.  Really we needed a 4-state switch – off, low speed, high speed and washer jets.  We opted to just get a 3-state switch, and forget low-speed mode.  The resistor required for low-speed operation was missing anyway, which is why you can see the two wires twisted together in front of the wiper motor.  I wasn’t responsible for this, and it’s a minor example of the lazy hack-jobs that have been done throughout the vehicle’s wiring.  Wiring the switch took a while of staring at the circuit diagrams in the maintenance manual to work out.  And despite being absolutely, mostly, fairly..somewhat sure I wired it right, the windscreen wipers don’t park themselves when the switch is set to the off position.  I’ll have to pull the switch and fix that, but at least for now, we can drive in the rain without having to guess where we are going.

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