D3 blower motor into d2?

[Stromaluski]

I actually did this on my car just last month. The squeaking of the original fan was driving me mad, so I bought a replacement D3 blower and swapped the plug.

This is the one I bought.
https://www.ebay.com/itm/4E0959101A-...72.m2749.l2649

Originally Posted by MikkiJayne

Polarity of the wires is not obvious, and on replacement factory motors for the D2 actually wrong, so replacement motors spin backwards and don't work.

I would suggest checking that old and new motors spin in the same direction once you've grafted the plug on (possibly hook it up using terminal blocks to test), and don't simply trust the wire colours even if they appear to match.

If you get the polarity wrong, then wouldn't the fan suck air from inside the car and push it into the engine compartment? I didn't check polarity at all when splicing the connector, but I get air from the vents, so I'm assuming it's running in the correct direction?